• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    ABSTRACT CVD coated cutting tools are provided. A coated cutting tool described herein, insome embodiments, comprises a PcBN substrate and a polished coating adhered to thesubstrate including one or more layers of Al2O3 deposited by chemical vapor deposition,Wherein the coating has a surface roughness (Ra) less than about 600 nm in an area of the cutting tool for contacting a Workpiece. 29
    公开号:SE1450016A1
    申请号:SE1450016
    申请日:2014-01-10
    公开日:2014-07-12
    发明作者:Frank Battaglia；Crystal Nestor；Peter Leicht；Kent Reiner；Charles Mcnemy
    申请人:Kennametal Inc；
    IPC主号:
    专利说明:

    CVD COATED POLYCRYSTALLINE c-BN CUTTING TOOLS FIELD The present invention relates to cutting tools having coatings applied by chemicalvapor deposition (CVD) and, in particular, to CVD coated polycrystalline cubic boronnitride (PcBN) cutting tools.
    BACKGROUND Cutting tools have been used in both coated and uncoated conditions formachining metals and alloys. In order to increase cutting tool Wear resistance andlifetime, one or more layers of refractory materials have been applied to cutting toolsurfaces. TiC, TiCN, TiOCN, TiN and Al2O3, for example, have been applied tocemented carbide substrates by CVD.
    Further, cutting tools based on polycrystalline cubic boron nitride (PcBN)substrates continue to gain importance in the metal Working industry given the highhardness and thermal stability (up to about 980°C) of cBN. Similar to cemented carbides,cutting tools based on PcBN substrates can also benefit from the application of refractorycoatings for various cutting applications including, machining of case-hardened andthrough-hardened steels, superalloys and cast iron. HoWever, While being generallyeffective for inhibiting Wear and extending PcBN tool life, refractory coatings havestruggled in applications involving materials having poor machinability, such as unaged cast iron.
    SUMMARY In one aspect, PcBN cutting tools are described having coatings adhered theretoWhich, in some embodiments, demonstrate desirable Wear resistance and increasedcutting lifetimes. In some embodiments, for example, coated PcBN cutting toolsdescribed herein demonstrate enhanced lifetime over prior cutting tools in applicationsemploying materials With poor machinability, such as unaged cast iron.
    A coated cutting tool described herein, in some embodiments, comprises a PcBNsubstrate and a polished coating adhered to the substrate including one or more layers of Al2O3 deposited by chemical vapor deposition, Wherein the coating has a surface l roughness (Ra) less than about 600 nm in an area of the cutting tool for contacting aWorkpiece. The substrate, in some embodiments, comprises greater than 85 Weightpercent PcBN. Further, the coating surface roughness (Ra) in a Workpiece contact area iscan be less than 250 nm or less than 200 nm.
    In another aspect, a coated cutting tool described herein comprises a PcBNsubstrate and a polished coating adhered to the substrate comprising a first AlgOg layerdeposited directly on the PcBN substrate and a second AlzOg layer deposited on a layer ofthe coating comprising one or more metallic elements selected from the group consistingof aluminum and metallic elements of Groups IVB, VB and VIB of the Periodic Tableand one or more non-metallic elements selected from the group consisting of non-metallic elements of Groups IIIA, IVA, VA and VIA of the Periodic Table, Wherein thecoating has a surface roughness (Ra) less than about 600 nm in an area of the cutting toolfor contacting a Workpiece.
    In another aspect, methods of making coated cutting tools are described herein. Amethod of making a coated cutting tool, in some embodiments, comprises providing aPcBN substrate and depo siting over the substrate by chemical vapor deposition a coatingcomprising one or more layers of AlzOg. The deposited coating is polished to a surfaceroughness (Ra) less than 600 nm in an area of the cutting tool for contacting a Workpiece.The deposited coating, in some embodiments, is polished to a surface roughness (Ra) lessthan 250 nm or less than 200 nm in a Workpiece contact area. Additionally, in someembodiments, polishing the deposited coating does not alter or substantially alter thestress condition of the coating. Further, the substrate can comprise greater than 85 Weightpercent PcBN.
    In a further aspect, methods of machining unaged cast iron workpieces aredescribed herein. A method of machining an unaged cast iron Workpiece comprisesproviding a coated cutting tool comprising a substrate of PcBN and a polished coatingadhered thereto including one or more layers of Al2O3 deposited by chemical vapordeposition, Wherein the polished coating has a surface roughness (Ra) less than about 600nm in an area for contacting the Workpiece. The unaged cast iron Workpiece is machinedWith the coated PcBN cutting tool, Wherein the coated cutting tool demonstrates an increase in cutting lifetime of at least 30% in comparison to a substantially identical CVD coated PcBN cutting tool wherein the coating is not polished in the workpiece contactarea.These and other embodiments are described further in the detailed description which follows.
    BRIEF DESCRIPTION OF THE DRAWINGS Figure I illustrates a substrate of a coated cutting tool according to oneembodiment described herein.
    Figure 2 illustrates a substrate of a coated cutting tool according to oneembodiment described herein.
    Figure 3 illustrates a substrate of a coated cutting tool according to oneembodiment described herein.
    Figure 4 illustrates a substrate of a coated cutting tool according to one embodiment described herein.
    DETAILED DESCRIPTION Embodiments described herein can be understood more readily by reference to thefollowing detailed description and examples and their previous and followingdescriptions. Elements, apparatus and methods described herein, however, are notlimited to the specific embodiments presented in the detailed description and examples.It should be recognized that these embodiments are merely illustrative of the principles ofthe present invention. Numerous modifications and adaptations will be readily apparent to those of skill in the art without departing from the spirit and scope of the invention.
    I. Coated Cutting Tools In one aspect, PcBN cutting tools are described having coatings adhered theretowhich, in some embodiments, demonstrate desirable wear resistance and increasedcutting lifetimes. A coated cutting tool described herein can comprise a PcBN substratecomprising greater than 85 weight percent PcBN and a polished coating adhered to thesubstrate including one or more layers of Al2O3 deposited by chemical vapor deposition, wherein the coating has a surface roughness (Ra) less than about 600 nm in an area of the cutting tool for contacting a Workpiece. In some embodiments, the coating surfaceroughness (Ra) in a Workpiece contact area is less than 250 nm or less than 200 nm.
    In another aspect, a coated cutting tool described herein comprises a PcBNsubstrate and a polished coating adhered to the substrate comprising a first Al2O3 layerdeposited directly on the PcBN substrate and a second AlzOg layer deposited on a layer ofthe coating comprising one or more metallic elements selected from the group consistingof aluminum and metallic elements of Groups IVB, VB and VIB of the Periodic Tableand one or more non-metallic elements selected from the group consisting of non-metallic elements of Groups IIIA, IVA, VA and VIA of the Periodic Table, Wherein thecoating has a surface roughness (Ra) less than about 600 nm in an area of the cutting toolfor contacting a Workpiece.
    Tuming noW to specific components, a coated cutting tool described hereincomprises a PcBN substrate. PcBN substrates can include any amount of PcBN notinconsistent With the objectives of the present invention. For example, PcBN substratescan comprise greater than 85 Weight percent PcBN. In some embodiments, a cutting tool substrate described herein cornprises PcBN in an amount selected from Table I.
    Table I - Weight Percent PcBN of Cutting Tool Substrate Substrate Wt.% PcBN260270>80>8529070-9586-9790-9792-95 Further, PcBN substrates of cutting tools described herein can also compriseceramic or metallic binder. Suitable ceramic binders for PcBN substrates can comprisenitrides, carbonitrides, carbides and/or borides of titanium, tungsten, cobalt or aluminum.
    In some embodiments, for example, a PcBN substrate comprises a binder of AlN, AlBg or mixtures thereof. Moreover, in some embodiments, a binder comprises solid solutions ofany of the foregoing ceramic or metallic binders.
    Compositional determination of a PcBN substrate described herein can beconducted by X-ray diffraction (XRD). The cutting tool substrate rake face or flank facecan be analyzed depending on cutting tool geometry. For compositional phase analysisof a PcBN substrate described herein, a PANalytical X”pert MRD diffraction systemfitted With a Eulerean cradle and microfocus optics for PcBN compacts and tips or aPANalytical X”pert MPD fitted With programmable optics for analysis of a monolithicsolid piece of PcBN can be used.
    Both x-ray diffraction systems are configured With focusing beam optics andfitted With a copper X-ray tube and operating parameters of 45 KV and 40 MA. Foranalysis of the monolithic solid piece, the PANalytical MRD is fitted With programmabledivergence slit and pro grammable antiscatter slit. The X-ray beam width is controlled byan appropriate mask size and X-ray beam length is fixed at 2mm using the programmableoptics. The PANalytical MPD is fitted With a linear strip solid state x-ray detector andnickel beta filter.
    The PANalytical X”pert MRD system is configured With a microfocusmonocapillary optics of either 100 u or SOOu focal spot depending on size of PcBNcompact. The PANalytical MRD is fitted With a linear strip solid state X-ray detector andnickel beta filter.
    Analysis scan range, counting times, and scan rate are selected to provide optimaldata for Rietveld analysis. A background profile is fitted and peak search is performed onthe PcBN substrate diffraction data to identify all peak positions and peak intensities.The peak position and intensity data is used to identify the crystal phase composition ofthe PcBN substrate using any of the commercially available crystal phase databases.
    Crystal structure data is input for each of the crystalline phases present in thesubstrate. Typical Rietveld refinement parameters settings are: Sample Geometry: Flat PlateLinear Absorption Coefficient: Calculated from average specimen compositionWeighting Scheme: Against Iobs Profile Function: Pseudo-Voigt Profile Base Width: Chosen per specimen Least Squares Type: Newton-RaphsonPolarization Coefficient: 1.0 The Rietveld refinement typically includes:Specimen Displacement: shift of specimen from X-ray alignment Background profile selected to best describe the background profile of the diffraction data Scale Function: scale function of each phase B overall: displacement parameter applied to all atoms in phaseCell parameters: a, b, c and alpha, beta, and gammaW parameter: describes peak FWHM Any additional parameter to achieve an acceptable Weighted R-value.
    PcBN substrates having compositional parameters described herein can beprovided in various constructions. For example, a coated cutting tool can comprise astand-alone monolithic solid piece PcBN substrate. Altematively, a PcBN substrate isprovided as a compact or insert attached to a support by brazing or other joiningtechnique. Further, a PcBN substrate can be a full top or full top/full bottom cuttinginsert on a support.
    Figure 1 illustrates a monolithic solid piece PcBN substrate of a coated cuttingtool according to one embodiment described herein. The PcBN substrate (10) comprisesa flank surface (12) and a rake surface (14), Wherein the flank (12) and rake (14) surfacesintersect to provide a cutting edge (16). The substrate also comprises an aperture (18)operable to secure the substrate (10) to a tool holder.
    Figure 2 illustrates a PcBN substrate of a coated cutting tool according to anotherembodiment Wherein the PcBN substrate is provided as a compact or insert joined to asupport by brazing or other technique. As illustrated in Figure 2, the cutting tool (20)comprises a support (22) having notches (24, 26) in opposing comers of the support (22).In some embodiments, the support (22) comprises cemented metal carbide, such astungsten carbide With a cobalt binder. A PcBN substrate (28) is provided as a compact orinsert Which affixes by brazing or other technique Within each of the notches (24, 26).
    The PcBN substrate (28) has a rake surface (30) and at least one flank surface (32). Acutting edge (34) is formed at the juncture of the rake surface (30) and at least one flank surface (32). The cuttin g tool in the embodiment of Figure 2 further comprises anaperture (36), which can assist the connection of the cutting tool (20) to a tool holder.
    Figure 3 illustrates a PcBN substrate of a coated cutting tool according to oneembodiment Wherein the PcBN substrate is provided as an ínsert on the top surface of asupport. As illustrated in Figure 3, the cutting tool (50) comprises a support (52) havinga top surface (54) and a bottom surface (53). In some embodiments, for example, thesupport (52) comprises cemented metal carbide such as a tungsten carbide with a cobaltbinder. The PcBN substrate (58) couples to the top surface (54) of the support (52) bybrazing or other joining technique. The PcBN substrate (58) comprises a rake surface(62) and at least one flank surface (64), Wherein a cutting edge (66) is formed at thejuncture of the rake surface (62) and at least one flank surface (64).
    Additionally, in some embodiments, a second PcBN substrate couples to the bottom surface of the support by brazing or other joining technique to provide a configuration wherein the support is sandwiched between top and bottom layers of PcBN.
    Figure 4 illustrates an embodiment Wherein the support (52) is sandwiched between top(58) and bottom (59) substrates of PcBN. As illustrated in Figure 4, the bottom PcBNsubstrate (59) also comprises a rake surface (not shown) and at least one flank surface(67), Wherein a cutting edge (68) is formed at the juncture of the rake surface and at leastone flank surface (67).
    As described herein, a polished coating adhered to the PcBN substrate comprisesone or more layers of AlgOg deposited by chemical vapor deposition, Wherein the coatinghas a surface roughness (Ra) less than about 600 nm in an area of the cutting tool forcontacting a workpiece. In some embodiments, an AlzOg layer of the polished coating isdeposited directly on a surface of the PcBN substrate. Altematively, an Al2O3 layer isdeposited on an inner layer of the coating comprising one or more metallic elementsselected from the group consisting of aluminum and metallic elements of Groups IVB,VB and VIB of the Periodic Table and one or more non-metallic elements selected fromthe group consisting of non-metallic elements of Groups IIIA, IVA, VA and VIA of thePeriodic Table. For example, an AlgOg layer can be deposited on a TiN, TiC or TiCN inner layer of the coating.
    Further, an inner layer on Which an Al2O3 layer can be deposited is bonding ormodification layer. Bonding or modification layers can be used to increase adhesionbetween an AlzOg layer and underlying layer, such as TiCN, and/or nucleate the desiredmorphology of the Al2O3 layer. Suitable bonding/modification layers comprise TiOCN,TiAlOCN or miXtures thereof (TiOCN/TiAlOCN). Bonding/modification layers, in someembodiments, are of sufficient thickness to remain part of the coating architecture afterAl2O3 deposition. In other embodiments, bonding/modification layers are consumedduring Al2O3 deposition and do not have a discernable presence in the final coatingarchitecture.
    In some embodiments, a first AlgOg layer is deposited directly on the PcBNsubstrate and a second Al2O3 layer is deposited on an inner layer of the coatingcomprising one or more metallic elements selected from the group consisting ofaluminum and metallic elements of Groups IVB, VB and VIB of the Periodic Table andone or more non-metallic elements selected from the group consisting of non-metallicelements of Groups IIIA, IVA, VA and VIA of the Periodic Table. The second Al2O3layer, in some embodiments, is deposited over a TiN, TiC or TiCN layer of the coating.A bonding or modification layer can be used during deposition of the second Al2O3 layerover the TiN, TiC or TiCN layer.
    An Al2O3 layer of a polished coating described herein can include one or morecrystalline phases. An Al2O3 layer, in some embodiments, is ot-Al2O3, K-AlzOg or an ot/K-AlgOg mixture. Additionally, individual AlgOg layers of a coating can each demonstratethe same crystalline phase or different crystalline phases. In one embodiment, forexample, a first Al2O3 layer of a coating is ot-Al2O3 While a second Al2O3 layer is K-Al2O3. In another embodiment, both first and second Al2O3 layers of a coating are singlephase ot-AlgOg.
    Further, an AlzOg layer of a polished coating described herein can have anydesired thickness not inconsistent With the objectives of the present invention. In some embodiments, an Al2O3 layer of the coating has a thickness selected from Table II.
    Table II - Al2O3 Layer Thickness (pm) AlzOg Layer Thickness (pm) 0.1-150.5-121-105-1510-20 In some coating embodiments Wherein multiple Al2O3 layers are present, the thickness ofan Al2O3 layer can be selected according to the position of the layer in the coating. Aninitial AlgOg layer deposited directly on the PcBN substrate, for example, can have athickness less than 1 pm While subsequent AlzOg layer(s) deposited over the initial layerare of thickness greater than 1 pm, such as 3-15 pm. Alternatively, an initial A12O3 layerdeposited directly on the PcBN substrate can have a thickness of at least about 5 pm or atleast about 10 pm. In some embodiments, a layer of AlgOg layer deposited directly onthe PcBN substrate has a thickness ranging from 5 pm to 20 pm.
    An AlzOg layer can be the outermost layer of the coating. In some embodiments,for example, one or more coating layers can be removed during polishing, therebypartially or fully exposing an underlying Al2O3 layer. Altematively, an Al2O3 layer is notthe outermost layer of the coating. In some embodiments, one or more outer layersremain over AlgO3 layer(s) of the coating after polishing. In such embodiments, a coatingouter layer can comprise one or more metallic elements selected from the groupconsisting of aluminum and metallic elements of Groups IVB, VB and VIB of thePeriodic Table and one or more non-metallic elements selected from the group consistingof non-metallic elements of Groups IIIA, VIA, VA and VIA of the Periodic Table, Forexample, in some embodiments, an outer layer of a polished coating is TiN, TiC or TiCN.Further, an outer layer construction can comprise a combination of TiN and TiCN layers(TiN/TiCN).
    Inner and outer layers of coatings described herein can have any thickness notinconsistent With the objectives of the present invention. An inner and/or outer layer of acoating, in some embodiments, can have a thickness ranging from 0.5 pm to 5 pm.
    Additionally, a polished coating described herein can have a total thickness (summation of all coating layers) less than 12 pm. In some embodiments, a polished coating has atotal thickness less than 10 pm or less than 3 pm. A polished coating described hereincan have a total thickness ranging from l- 12 pm or from 2-10 pm.
    Further, a polished coating adhered to a PcBN sub strate can have anyarrangement or architecture of Al2O3 layer(s), inner layer(s) and/or outer layer(s)described herein. In some embodiments, a coated cutting tool described herein has anarchitecture selected from Table III. Coating structures provided in Table III begin With the innerrnost layer adj acent to the substrate and continue to the outermost layer. 10 Table III - Coated Cutting Tool Architectures Substrate CVD Coating Structure PcBN Aizog PcBN Al2O3-TiN-TiCN- A12O3 -TiNPcBN Al2O3-TiN-TiCN- Al2O3 -TiN/TiCNPcBN Al2O3-TiN-TiCN- A12O3 PcBN Al2O3 -TiN PcBN Al2O3 -TiNfTiCN PcBN Al2O3-TiCN-TiN PcBN A12O3-TiCN-TiN/TiCN PcBN Al2O3-TiCN A polished CVD coating having a structure described herein displays a surfaceroughness (Ra) less than 600 nm in an area of the PcBN cutting tool for contacting aWorkpiece. A Workpiece contact area of a cutting tool can include one or more cuttingedges of the tool. In some embodiments, for example, a Workpiece contact area is ahoned region of the cutting tool. In embodiments, a polished coating described herein has a surface roughness (Ra) in a Workpiece contact area selected from Table IV.
    Table IV - Polished Coating Surface Roughness (Ra) Polished Coating Surface Roughness (Ra) - nm S500S250<200 10-250 50-175 25-150 Coating surface roughness can be deterrnined by optical profilometry using WYKO®NT-Series Optical Profilers commercially available from Veeco Instruments, Inc. ofPlainview, New York.
    As discussed further herein, coatings can be polished to obtain the desired surfaceroughness under sufficiently mild conditions so as not to alter the stress condition of thecoating in the polished area. In some embodiments, for example, polishing does notreduce levels of residual tensile stress and/or increase levels of residual compressivestress in the coating. In some embodiments wherein the outer layer is removed bypolishing, the polishing does not alter or substantíally alter the stress condition of theremaining layer(s) of the coating. Further, coatings described herein can demonstratesurface morphologies and structures consistent with being polished, such as striations and/or directionally dependent polishing lines.
    II. Methods of Making Coated Cutting Tools In another aspect, methods of making coated cutting tools are described herein. Amethod of making a coated cutting tool, in some embodiments, comprises providing aPcBN substrate and depo siting over the substrate by chemical vapor deposition a coatingcomprising one or more layers of A120; The deposited coating is polished to a surfaceroughness (Ra) less than 600 nm in an area of the cutting tool for contacting a workpiece.
    Tuming now to specific steps, a method described herein comprises providing asubstrate comprising PcBN. Any PcBN substrate recited in Section I hereinabove can beused. A substrate, for example, can have a PcBN content selected from Table I herein.For example, in one embodiment, the PcBN substrate can comprise greater than 85weight percent PcBN. In some embodiments, a rough shaped PcBN substrate isprovided, and the top/bottom/periphery/T-land of the substrate are ground with adiamond grinding wheel. Hone is added with a Gerber process employing a flat brushwith loose diamond media of the appropriate particle size to achieve the target hone size.Further, the PcBN substrate can be subjected to a precoat treatment of wet blasting withceramic particles such as alumina particles. The wet blasting treatment cleans and prepares PcBN substrate surfaces for CVD deposition of a coating described herein. The 11 blasted PcBN substrate may be Washed in an ultrasonic Water bath to remove any foreignparticles and films from the Wet blasting treatment.
    A coating comprising one or more layers of Al2O3 is deposited by chemical vapordeposition on surfaces of the PcBN substrate. The coating can have any construction,compositional parameters and/or properties described in Section Iherein. In someembodiments, for example, a coating deposited by CVD according to a method describedherein has a structure selected from Table III above. Further, individual layers ofcoatings described herein can be deposited from reactant gas mixtures having components provided in Table V.
    Table V - Coating Layer Reactant Gas Mixtures Coating Layer Reactant Gas Mixture Al2O3 H2, AlCl3, CO2, HCl, H2STiN H2, N2, TiCl4 TiCN H2, N2, TiCl4, CH3CNTiOCN* H2, N2, TiCl4, CH4, COTiAlOCN* H2, N2, TiCl4, CH4, CO, AlCl3 * Bonding/Modification Layer As known to one of skill in the art, structural parameters specific to individual coatinglayers listed in Table V, such as desired thickness, grain size and/or crystalline phase, canbe achieved by varyin g CVD process parameters of deposition time, temperature andpressure as Well as compositional percentages of reactant gas species in the mixture.
    FolloWing deposition, the CVD coating is polished to a surface roughness (Ra)less than about 600 nm in an area of the cutting tool for contacting a Workpiece. In someembodiments, the CVD coating is polished in a Workpiece contact area to a surfaceroughness (Ra) having a value selected from Table IV hereinabove.
    A Workpiece contact area of a cutting tool can include one or more cutting edgesof the tool. In some embodiments, for example, a Workpiece contact area is a honedregion of the cutting tool. Polishing can be administered With paste of appropriatediamond or ceramic grit size. Grit size of the paste, in some embodiments, ranges from 1um to 10 um. In one embodiment, a 5-10 um diamond grit paste is used to polish the coating. Further, grit paste can be applied to the CVD coating by any apparatus not 12 inconsistent With the objectives of the present invention, such as brushes. In oneembodiment, for example, a flat brush is used to apply grit paste to the CVD coating in aWorkpiece contact area of the PcBN cutting tool.
    The coating is polished for a time period sufficient to achieve the desired surfaceroughness (Ra) in a Workpiece contact area of the cutting tool. As described herein,polishing conditions can be selected so as not to alter or substantially alter the stresscondition of the coating in the polished area. In some embodiments, for example,polishing does not reduce levels of residual tensile stress and/or increase levels ofresidual compressive stress in the coating. As known to one of skill in the art, pre- andpost-polishing stress conditions of layer(s) of the coating can be determined by XRDusing the Sinzxy method With reference to reflection from the appropriate crystallographicplane (hkl) of the layer being analyzed.
    Polishing, in some embodiments, does not remove one or more outer layers of thecoating. With reference to Table III hereinabove, polishing does not remove one or moreouter layers of TiN, TiCN, TiN/TiCN and/or AlzOg. Alternatively, in someembodiments, polishing does remove or partially remove one or more outer layers of thecoating. Outer layer(s) of TiN and/or TiCN can be partially or fully removed, therebyexposing an underlying AlgOg layer. In some embodiments Wherein one or more outerlayers are removed by polishing, the polishing does not alter or substantially alter thestress condition of the remaining layer(s) of the coating.
    In being polished, a CVD coating described herein is not subjected to post coatblasting or shot techniques, such as Wet or dry blasting With ceramic or other particletypes. Further, the coated cutting tool can be cleaned in an ultrasonic Water bath to remove any residual paste or grit from the polishing process.
    III. Methods of Machining Unaged Cast Iron In a further aspect, methods of machining unaged cast iron workpieces aredescribed herein. A method of machining an unaged cast iron Workpiece comprisesproviding a coated cutting tool comprising a substrate of PcBN and a polished coatingadhered thereto including one or more layers of A12O3 deposited by chemical vapor deposition, Wherein the polished coating has a surface roughness (Ra) less than about 600 13 nm in an area for Contacting the cast iron Workpiece. The unaged cast iron Workpiece ismachined With the coated PcBN cutting tool, Wherein the coated cutting tooldemonstrates an increase in cutting lifetime of at least 30% in comparison to asubstantially identical CVD coated PcBN cutting tool Wherein the coating is not polishedin the Workpiece contact area. Unaged cast iron Workpieces, as used herein, refer to castiron Workpieces less than 3 days old from pour.
    The coated cutting tool comprising a PcBN substrate and a polished coatingadhered thereto can have any construction, compositional parameters and/or propertiesdescribed in Section I hereinabove. In some embodiments, for example, the coated PcBNcutting tool comprises a substrate having a PcBN content selected from Table I hereinand coating architecture selected from Table III herein. Further, the coating can have asurface roughness (Ra) in a Workpiece contact area selected from Table IV herein.
    The coated cutting tool comprising a PcBN substrate and a polished coatingadhered thereto, in some embodiments, demonstrates an increase in cutting lifetime forunaged cast iron according to Table VI in comparison to a substantially identical coated cutting tool Wherein the coating is not polished in the Workpiece contact area.
    Table VI ~ Increase in Cutting Lifetime When Machining Unaged Cast Iron Percent Increase in Cutting Lifetime vs. PcBN CuttingTool Having Unpolished CVD Coating25027029050-9970-9990-99 Additionally, a coated cutting tool comprising a PcBN substrate and a polishedcoating adhered thereto, in some embodiments, demonstrates an increase in cuttinglifetime for unaged cast iron of at least 10% in comparison to a substantially identicalcoated PcBN cutting tool Wherein the coating is particle blasted in the Workpiece contactarea.
    As provided in the following Examples, coated PcBN cutting tools described herein having a polished CVD coating and comparative cutting tools of unpolished CVD 14 coatings are subjected to identical cutting conditions for lifetime evaluation. Further, theunaged cast iron Workpieces machined With coated PcBN cutting tools described hereinare grey (gray) cast iron.
    These and other embodiments are further illustrated by the following non-limiting 5 examples.EXAMPLE 1Coated Cutting Tool BodyCoated PcBN cutting tool (A) having a constructions described herein Was 10 produced by placing a PcBN cutting insert substrate [ANSI geometry CNM433S0820]into an axíal flow hot-Wall CVD reactor. Prior to placing in the CVD reactor, the PcBNsubstrate Was prepared and cleaned as described in Section II hereinabove. The substratecomprised 90 Weight percent PcBN With the balance AlN and AlB2 binder. A coatinghaving an architecture described herein Was deposited on PcBN substrate (A) according 15 to the CVD process parameters provided in Table VII.
    Table VII - CVD Deposition of Coating Process Step Temp. Pressure Time Gases Utilized°C mbar min.(1) ot-Al2O3 950-1000 60-200 60-120 H2, AlCl3, CO2, HCl , H2S(2) TiN 850-920 60-200 20-40 H2, N2, TiC14 The resulting multilayered CVD coating demonstrated the properties provided in Table20 VIII.
    Table VIII - Properties of CVD Coating Coating Layer Thickness (pm)ot-Al2O3 1 -2TiN 0.8- 1 .2 The CVD coating Was subsequently polished in the hone area of PcBN cutting tool (A) to25 a surface roughness (Ra) less than 250 nm using 5-10 um diamond grit paste applied via aflat brush. Polishing of the CVD coating removed the outer TiN layer at the cutting edge.Coated PcBN cutting tool (A) Was then Washed in an ultrasonic Water bath to remove any residual grit or paste.
    EXAMPLE 2Coated Cutting Tool BodyCoated PcBN cutting tool (B) having a construction described herein Was5 produced by placing a PcBN cutting insert substrate [ANSI geometry CNMA433S0820] into an axial flow hot-Wall CVD reactor. Prior to placing the in the CVD reactor, thePcBN substrate Was prepared and cleaned as described in Section II hereinabove. Thesubstrate comprised 90 Weight percent PcBN With the balance AlN and AlB2 binder. Acoating having an architecture described herein Was deposited on the PcBN substrate 10 according to the CVD process parameters provided in Table IX.
    Table IX - CVD Deposition of Coating Process Step Temp. Pressure Time Gases Utilized°C mbar min.( 1) oL-Al2O2, 950-1000 60-200 45-90 H2, AlCl3, CO2, HCl , H2S(2) TiN 800-920 60-200 30-60 H2, N2, TiCl4(3) MT*-TiCN 800-940 60-200 45-90 H2, N2, TiC14, CH3CN(4) TiCN 900-980 60-200 15-30 H2, N2, TiCl4, CH3CN(5) TiOCN/TiAlOCN** 900-980 60-200 10-20 H2, N2, TiC14, CH4, CO, AlC13(5) o.-Al2O3 950-1000 60-200 450-520 H2, AlCl3, C02, HCl , H2S(6) TiN 800-920 60-200 20-40 H2, N2, TiC14 * Medium Temperature** Modification Layer The resulting multilayered CVD coating demonstrated the properties provided inTable X.
    Table X - Properties of CVD Coating Coating Layer Thickness (um)(1) a-AI2O3 0.3-1.0(2) TiN 0.2-0.5(3) MT-TiCN 1.2-2(4) TiCN 0.1-0.3(5)oL-A12O2, 38-5(6) TiN 1.5-3 The CVD coating Was subsequently polished in the hone area of PcBN cutting tool (B) toa surface roughness (Ra) less than 250 nm using 5-10 um diamond grit paste applied via a flat brush. Polishing of the CVD coating removed the outer TiN layer at the cutting edge. 16 Coated PcBN cutting tool (B) Was then Washed in an ultrasonic Water bath to remove any residual grit or paste.
    EXAMPLE 35 Coated Cutting Tool Bodies Coated PcBN cutting tools (C-E) having constructions described herein Were produced as follows. PcBN substrates of cutting tools C-E Were provided according to Table XI.1 0Table XI - PcBN SubstratesCutting Tool PcBN Substrate Composition ANSI GeometryC 90% PcBN; Bal. AlN, AlB2 binder CNM433S0820D 92% PcBN; Bal. AlN, AlB2 binder CNM433S0820E 70% PcBN; Bal. TiCN binder CNM433S0820 Prior to placing the in an axial flow hot-Wall CVD reactor, PcBN substrates (C-E) Wereprepared and cleaned as described in Section II hereinabove. A coating having an15 architecture described herein Was deposited on each of PcBN substrates (C-E) according to the CVD process parameters provided in Table XII.
    Table XII- CVD Deposition of Coating Process Step Temp. Pressure Time Gases Utilized°C mbar min.(l) a-Al2O3 800-900 60-200 400-520 H2, AlCl3, CO2, HCl , H2S(2) TiN 800-920 60-200 20-40 H2, N2, TiCl4, HCl 20 The resulting CVD multilayered coatings demonstrated the properties provided in TableXIII.
    Table XIII - Properties of CVD Coating Coating Layer Thickness (um)(X-Alzog, IÛ- 1 1TiN 0.5-1 17 The CVD coating Was subsequently polished in the hone area of each PcBN cutting tool(C-E) to a surface roughness (Ra) less than 250 nm using 5-10 um diamond grit pasteapplied via a flat brush. Polishing of the CVD coating removed the outer TiN layer at thecutting edge. until the outer TiN layer Was removed. The coated PcBN cutting tool Was 5 then Washed in an ultrasonic Water bath to remove any residual grit or paste.
    EXAMPLE 4Coated Cutting Tool Bodies10 Coated PcBN cutting tools (F and G) Were each provided a polished CVD coatingas set forth in Example 2 above. PcBN substrates of coated cutting tools (F and G) Were provided according to Table XIV.
    Table XIV - PcBN SubstratesCutting Tool PcBN Substrate Composition ANSI GeometryF 90% PcBN; Bal. AlN, AlBz binder CNM433S0820G 92% PcBN; Bal. AlN, AIBZ binder CNM433S0820 EXAMPLE 5Coated Cutting Tool Bodies 20 Coated PcBN cutting tools (H and I) having constructions described herein Were produced as follows. PcBN substrates of cutting tools (H and I) Were provided according to Table XV.
    Table XV - PcBN SubstratesCutting Tool PcBN Substrate Composition ANSI GeometryH 90% PcBN; Bal. AlN, AlBz binder CNM433S0820I 92% PcBN; Bal. AlN, AlBz binder CNM433S0820 Prior to placing the in an axial flow hot-Wall CVD reactor, PcBN substrates (H and I)Were prepared and cleaned as described in Section II hereinabove. A coating having anarchitecture described herein Was deposited on each of PcBN substrates (H and I) according to the CVD process parameters provided in Table XVI. 18 5 Table XVI - CVD Deposition of Coating Process Step Temp. Pressure Time Gases Utilized°C mbar min.(1) ot-Al2O2 800-900 60-200 400-520 H2, AlCl3, CO2, HC1 , H2S(2) TiCN 900-980 60-200 20-50 H2, N2, TiCl4, CH3CN(3) TiN 800-920 60-200 20-40 H2, N2, TiCl4 The resulting multilayered CVD coating demonstrated the properties provided in TableXVII.
    Table XVII - Properties of CVD Coating Coating Layer Thickness (um)ot-Al2O3 6-7TiCN 2-3TiN 0.3-1 The CVD coating Was subsequently polished in the hone area of each PcBN cutting tool(H and I) to a surface roughness (Ra) less than 250 nm using 5-10 um diamond grit pasteapplied via a flat brush. Polishing of the CVD coating removed the outer TiN layer at thecutting edge. Coated PcBN cutting tools (H and I) Were then Washed in an ultrasonic Water bath to remove any residual grit or paste.
    EXAMPLE 6Cutting Tool Lifetime CVD coated PcBN cutting tool (A) of Example 1 Was subjected to cutting lifetimetesting of aged grey cast iron in comparison to Comparative CVD coated PcBN cuttingtools (J and K). As provided in Table XVIII, Comparative coated PcBN cutting tools (Jand K) share the same substrate and CVD coating architecture as cutting tool (A).HoWever, the CVD coatings of Comparative cutting tools (J and K) Were not polished toa surface roughness (Ra) described herein in a Workpiece contact area of the cutting tool.Further, Comparative cutting tool (J) Was Wet blasted With Al2O3 particle slurry to a surface roughness less than about 250 nm. 19 Table XVIII - Comparative CVD Coated PcBN Cutting Tools Cutting Tool PcBN Substrate Composition ANSI Geometry CVD Coating CVD CoatingTreatmentJ 90% PcBN; Bal. AlN, AlBz CNM433S0820 Same as Nonebinder Example 1K 90% PcBN; Bal. AlN, AlB2 CNM433S0820 Same as Post-coat blastbinder Example 1 With Al2O3 gritslurry to Ra <250nm For lifetime testing, two cutting edges Were tested for each CVD coated PcBN cutting 5 insert (A, J and K) as follows: Workpiece - Aged Class 30 Gray CI Tubes With (W/OD scale) Feed Rate - 0.016 iprDepth of Cut - 0.060 inchLead Angle: -5° 10 Coolant - DRY The mean lifetime in minutes of each CVD coated PcBN cutting insert (A, J and K) is provided in Table XIX. EOL Was registered by one or more failure modes of: Uniform Wear (UW) = 0.012 inchesMax Wear (MW) = 0.012 inches 15 Nose Wear (NW) = 0.012 inchesDepth of Cut Notch Wear (DOCN) = 0.012 inchesTrailing Edge Wear (TW) = 0.012 inches Table XIX ~ Mean Cutting Lifetime (Aged Grey Cast Iron) CVD Coated PcBN Mean Cutting Failure ModeCutting Tool LifetimeA 29.1 NWJ* 10.4 MWK* 25.9 NW 20 * Comparative CVD Coated PcBN Cutting Tools As provided in Table XIX, PcBN cutting tool (A) having the polished CVD coating demonstrated a 180% increase in lifetime relative to Comparative cutting tool (J) and a 12% increase in lifetime over Comparative cutting tool (K) having a particle blastedcoating.
    EXAMPLE 7Cutting Tool Lifetime CVD coated PcBN cutting tools (B-E) of Examples 2 and 3 Were subjected tocutting lifetime testing of unaged grey cast iron in comparison to Comparative CVDcoated PcBN cutting tool (L). As provided in Table XX, the architecture of Comparativecutting tool (L) is the same as coated PcBN cutting tool (B). HoWever, the CVD coatingof Comparative cutting tool (L) Was not polished to a surface roughness (Ra) described herein in a Workpiece contact area of the cutting tool.
    Table XX - Comparative CVD Coated PcBN Cutting Tools Cutting Tool PcBN Substrate Composition ANSI Geometry CVD Coating CVD CoatingTreatmentL 90% PcBN; Bal. AlN, AlBz CNMA433S0820 Same as None binder Example 2 For the lifetime testing, one repetition Was performed for each CVD coated PcBN insert(B-E and L) as follows: Workpiece - Unaged Class 30 Gray CI Tubes With (W/OD scale) Feed Rate - 0.016 ipr Depth of Cut- 0.060 inch Lead Angle: -50 Coolant - DRY The lifetime in minutes of each CVD coated PcBN cutting ínsert (B-E and L) is provided in Table XXI. EOL Was registered by one or more failure modes of:Uniform Wear (UW) = 0.012 inches Max Wear (MW) = 0.012 inches Nose Wear (NW) = 0.012 inches Depth of Cut Notch Wear (DOCN) = 0.012 inches Trailíng Edge Wear (TW) = 0.012 inches 21 Table XXI ~ Mean Cutting Lifetime (Unaged Grey Cast Iron) CVD Coated PcBN Cutting Lifetime Failure ModeCutting ToolB 27.0 NWC 24.2 NWD 26.7 NWE 19. 1 NWL* 1 3.6 NW * Comparative CVD Coated PcBN Cutting Tools As provided in Table XXI, PcBN cutting tools comprising polished CVD coatings (B-E)demonstrated enhanced cutting lifetimes relative to Comparative cutting tool (L). Fordirect comparison, PcBN cutting tool (B) having a polished CVD coating describedherein displayed a 99% increase in cutting lifetime relative to Comparative cutting tool(L)- EXAMPLE 8Cutting Tool Lifetime CVD coated PcBN cutting tools (D and F-I) of Examples 3-5 Were subjected to cutting lifetime testing of unaged grey cast iron as follows: Workpiece - Unaged Class 30 GCI As Cast - Unaged Feed Rate - 0.016 ipr Depth of Cut- 0.060 inch Lead Angle: -5° Coolant - DRY The mean lifetime in minutes over two cutting edges of each CVD coated PcBN insert (D and F-I) is provided in Table XXII. EOL Was registered by one or more failuremodes of: Uniform Wear (UW) = 0.012 inches Max Wear (MW) = 0.012 inches Nose Wear (NW) = 0.012 inches Depth of Cut Notch Wear (DOCN) = 0.012 inches Trailing Edge Wear (TW) = 0.012 inches 22 Table XXII ~ Mean Cutting Lifetime (Unaged Grey Cast Iron) CVD Coated PcBN Cutting Lifetime Failure ModeCutting Tool D 15.7 NW F 17.2 NWG 1 3.5 NW H 1 1.9 NW I 15 . 3 NW Various embodiments of the invention have been described in fulfillment of thevarious objects of the invention. It should be recognized that these embodiments aremerely illustrative of the principles of the present invention. Numerous modifications andadaptations thereof Will be readily apparent to those skilled in the art Without departingfrom the spirit and scope of the invention.
    That Which is claimed is: 23
    权利要求:
    Claims (34)
    [1] 1. A coated cutting tool comprising: a polycrystalline cubic boron nitride (PcBN) substrate comprising greater than 85Weight percent PcBN; and a polished coating adhered to the substrate comprising one or more layers ofAlgOg deposited by chemical vapor deposition, Wherein the coating has a surfaceroughness (Ra) less than about 600 nm in an area of the cutting tool for contacting a Workpiece.
    [2] 2. The coated cutting tool of claim 1, Wherein the surface roughness (Ra) is less than about 250 nm.
    [3] 3. The coated cutting tool of claim 1, Wherein the surface roughness (Ra) ranges from about 25 nm to less than 200 nm.
    [4] 4. The coated cutting tool of claim 1, Wherein an Al2O3 layer of the coating is deposited directly on the PcBN substrate.
    [5] 5. The coated cutting tool of claim 1, Wherein a first Al2O3 layer of the coating isdeposited directly on the PcBN substrate and a second AlzOg layer is deposited on a layerof the coating comprising one or more metallic elements selected from the groupconsisting of aluminum and metallic elements of Groups IVB, VB and VIB of thePeriodic Table and one or more non-metallic elements selected from the group consisting of non-metallic elements of Groups IIIA, IVA, VA and VIA of the Periodic Table.
    [6] 6. The coated cutting tool of claim 5, Wherein the second AlgOg layer is deposited on a TiN, TiC or TiCN layer.
    [7] 7. The coated cutting tool of claim 5, Wherein the first AlzOg layer has thickness less than about 1 um and the second Al2O3 layer has thickness greater than about 3 um. 24
    [8] 8. The coated cutting tool of claim 1 further comprising an outer layer depositedover the one or more Al2O3 layers, the outer layer comprising one or more metallicelements selected from the group consisting of aluminum and metallic elements ofGroups IVB, VB and VIB of the Periodic Table and one or more non-metallic elementsselected from the group consisting of non-metallic elements of Groups IIIA, IVA, VAand VIA of the Periodic Table.
    [9] 9. The coated cutting tool of claim 8, Wherein the outer layer is TiN, TiCN or a combination of TiN and TiCN layers.
    [10] 10. The coated cutting tool of claim 1, Wherein the substrate comprises at least 85Weight percent PcBN.
    [11] 11. ll. The coated cutting tool of claim 1, Wherein the substrate comprises at least 90Weight percent PcBN.
    [12] 12. The coated cutting tool of claim 1, Wherein the one or more AlgOg layers are ot-AlgOg.
    [13] 13. A coated cutting tool comprising: a polycrystalline cubic boron nitiide substrate; and a polished coating adhered to the substrate comprising a first Al2O3 layerdeposited directly on the PcBN substrate and a second AlzOg layer deposited on a layer ofthe coating comprising one or more metallic elements selected from the group consistingof aluminum and metallic elements of Groups IVB, VB and VIB of the Periodic Tableand one or more non-metallic elements selected from the group consisting of non-metallic elements of Groups IIIA, IVA, VA and VIA of the Periodic Table, Wherein thecoating has a surface roughness (Ra) less than about 600 nm in an area of the cutting tool for contacting a Workpiece.
    [14] 14. The coated cutting tool of claim 13, Wherein the surface roughness (Ra) ranges from greater than 200 nm to about 600 nm.
    [15] 15. The coated cutting tool of claim 13, Wherein the surface roughness (Ra) is less than about 250 nm.
    [16] 16. The coated cutting tool of claim 13, Wherein the second Al2O3 layer is depositedon a TiN, TiC or TiCN layer.
    [17] 17. The coated cutting tool of claim 13, Wherein the first AlgOg layer has thickness less than about 1 um and the second AlzOg layer has thickness greater than about 3 um.
    [18] 18. The coated cutting tool of claim 13, Wherein the substrate comprises at least 90Weight percent PcBN.
    [19] 19. A method of making a coated cutting tool comprising: providing a polycrystalline cubic boron nitride substrate (PcBN) substratecomprising greater than 85 Weight percent PcBN; depositing over the substrate by chemical Vapor deposition a coating comprisingone or more layers of Al2O3; and polishing the coating to a surface roughness (Ra) less than 600 nm in an area of the cutting tool for contacting a Workpiece.
    [20] 20. The method of claim 19, Wherein the surface roughness (Ra) is less than about 250 nm.
    [21] 21. The method of claim 19, Wherein the surface roughness (Ra) is from 25 nm to lessthan 200 nm.
    [22] 22. The method of claim 19, Wherein an Al2O3 layer of the coating is depositeddirectly on the PcBN substrate. 26
    [23] 23. The method of claim 19, Wherein a first AlzOg layer of the coating is depositeddirectly on the PcBN substrate and a second AlzOg layer is deposited on a layer of thecoating comprising one or more metallic elements selected from the group consisting ofaluminum and metallic elements of Groups IVB, VB and VIB of the Periodic Table andone or more non-metallic elements selected from the group consisting of non-metallic elements of Groups IIIA, IVA, VA and VIA of the Periodic Table.
    [24] 24. The method of claim 19, Wherein the deposited coating comprises one or more outer layers over the one or more layers of AlgOg.
    [25] 25. The method of claim 24, Wherein the one or more outer layers each comprise oneor more metallic elements selected from the group consisting of aluminum and metallicelements of Groups IVB, VB and VIB of the Periodic Table and one or more non-metallic elements selected from the group consisting of non-metallic elements of Groups IIIA, IVA, VA and VIA of the Periodic Table.
    [26] 26. The method of claim 19, Wherein the one or more AlgOg layers are ot-AlgOg.
    [27] 27. The method of claim 19, Wherein polishing the coating does not substantially alter the stress condition of the coating.
    [28] 28. The method of claim 19, Wherein the substrate comprises at least 90 Weightpercent PcBN.
    [29] 29. A method of machining an unaged cast iron Workpiece comprising: providing a coated cutting tool comprising a substrate of polycrystalline cubicboron nitride (PcBN) and a polished coating adhered to the substrate including one ormore layers of AlzOg deposited by chemical vapor deposition, Wherein the polishedcoating has a surface roughness (Ra) less than about 600 nm in an area of the cutting tool for contacting the Workpiece; and 27 machining the unaged cast iron workpiece with the coated cutting tool, Whereinthe coated cutting tool demonstrates an increase in cutting lifetime of at least 30% incomparison to a substantially identical coated PcBN cutting tool Wherein the coating is not polished in the Workpiece contact area.
    [30] 30. The method of claim 29, Wherein the surface roughness (Ra) is less than about 250 nm
    [31] 31. The method of claim 29, Wherein the surface roughness (Ra) is from 25 nm to lessthan 200 nm.
    [32] 32. The method of claim 29, Wherein the unaged cast iron is grey cast iron.
    [33] 33. The method of claim 29, Wherein the coated cutting tool comprising the polishedcoating demonstrates an increase in cutting lifetime of at least 90% in comparison to the substantially identical cutting tool.
    [34] 34. The method of claim 29, Wherein substrate comprises greater than 85 Weight percent PcBN. 28
    类似技术:
    公开号 | 公开日 | 专利标题
    CN101080295B|2010-08-18|Coated cutting tool
    KR102033188B1|2019-10-16|Surface-coated cutting tool with hard coating that exhibits excellent chipping resistance and abrasion resistance
    CN100418679C|2008-09-17|Composite coatings for finishing of hardened steels
    JP5715570B2|2015-05-07|Coated tool
    US8383200B2|2013-02-26|High hardness nanocomposite coatings on cemented carbide
    JPH0852603A|1996-02-27|Cutting tool insert and manufacture thereof
    US9181620B2|2015-11-10|Coatings for cutting tools
    CN107980013A|2018-05-01|Surface-coated cutting tool and its manufacture method
    JP5904389B1|2016-04-13|Surface-coated cutting tool and manufacturing method thereof
    US10570521B2|2020-02-25|Multilayer structured coatings for cutting tools
    SE1450016A1|2014-07-12|CVD coated cutting tools of polycrystalline c-BN
    JP6507456B2|2019-05-08|Method of manufacturing surface coated cutting tool
    US8507082B2|2013-08-13|CVD coated polycrystalline c-BN cutting tools
    RU2760426C2|2021-11-25|Cutting tool equipped with coating
    US9181621B2|2015-11-10|Coatings for cutting tools
    JP4878808B2|2012-02-15|Replaceable cutting edge
    RU2766604C2|2022-03-15|Coated cutting tool
    US20210123140A1|2021-04-29|Coated cutting tool
    JP4845490B2|2011-12-28|Surface coated cutting tool
    JP6507458B2|2019-05-08|Method of manufacturing surface coated cutting tool
    WO2020250626A1|2020-12-17|Cutting tool
    JP2657235B2|1997-09-24|Coated super hard alloy tool
    JP2006247779A|2006-09-21|Coated cbn base sintered body cutting tool
    WO2019043095A1|2019-03-07|A coated cutting tool and a method for coating the cutting tool
    JPH07108405A|1995-04-25|Surface coated cutting tool
    同族专利:
    公开号 | 公开日
    JP2014133298A|2014-07-24|
    CN103924211A|2014-07-16|
    CN103924211B|2019-03-12|
    US9028953B2|2015-05-12|
    US20140199130A1|2014-07-17|
    DE102013113502A1|2014-07-17|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    SE451730B|1979-03-29|1987-10-26|Sumitomo Electric Industries|SINTRAD PRESS BODY FOR WORKING TOOLS|
    JPS601390B2|1981-06-29|1985-01-14|Mitsubishi Metal Corp|
    EP0102843B1|1982-09-06|1989-08-30|De Beers Industrial Diamond Division Limited|Tool inserts|
    JPH0621312B2|1985-12-28|1994-03-23|住友電気工業株式会社|Sintered body for high hardness tool and manufacturing method thereof|
    US4880755A|1987-05-19|1989-11-14|Kennametal Inc.|Sialon cutting tool composition|
    JPH0725619B2|1987-10-06|1995-03-22|三菱マテリアル株式会社|Surface coated cubic boron nitride based ultra high pressure sintering material for cutting tools|
    JPH0725611B2|1987-10-06|1995-03-22|三菱マテリアル株式会社|Surface coated cubic boron nitride based ultra high pressure sintering material for cutting tools|
    JPH0761902B2|1989-07-11|1995-07-05|住友電気工業株式会社|Cubic boron nitride sintered body and method for producing the same|
    EP0460237B1|1989-12-25|1996-03-06|Sumitomo Electric Industries, Ltd.|Throw-away drill|
    CA2030350C|1989-11-27|1994-08-02|Tetsuo Nakai|Hard sintered compact for tools|
    US5330853A|1991-03-16|1994-07-19|Leybold Ag|Multilayer Ti-Al-N coating for tools|
    US5139537A|1991-06-13|1992-08-18|Julien D Lynn|Titanium-nitride coated grinding wheel and method therefor|
    JP3035797B2|1991-07-04|2000-04-24|三菱マテリアル株式会社|Cutting insert made of cubic boron nitride based ultra-high pressure sintered material with high strength|
    DE4126851A1|1991-08-14|1993-02-18|Krupp Widia Gmbh|TOOL WITH WEAR-RESISTANT CUBIC BORONITRIDE OR POLYCRYSTALLINE CUBIC BORONITRIDE CUTTING, METHOD FOR THE PRODUCTION THEREOF, AND USE THEREOF|
    EP0665308B1|1993-08-16|2000-01-05|Sumitomo Electric Industries, Ltd.|Cemented carbide alloy for cutting tool and coated cemented carbide alloy|
    EP0592986B1|1992-10-12|1998-07-08|Sumitomo Electric Industries, Limited|Ultra-thin film laminate|
    US5372873A|1992-10-22|1994-12-13|Mitsubishi Materials Corporation|Multilayer coated hard alloy cutting tool|
    US5374471A|1992-11-27|1994-12-20|Mitsubishi Materials Corporation|Multilayer coated hard alloy cutting tool|
    SE501527C2|1992-12-18|1995-03-06|Sandvik Ab|Methods and articles when coating a cutting tool with an alumina layer|
    US5382273A|1993-01-15|1995-01-17|Kennametal Inc.|Silicon nitride ceramic and cutting tool made thereof|
    JPH07172919A|1993-12-21|1995-07-11|Kyocera Corp|Titanium-compound sintered material|
    JPH07286229A|1994-04-21|1995-10-31|Nippon Oil & Fats Co Ltd|High pressure phase boron nitride sintered body for cutting tool and its production|
    US5597272A|1994-04-27|1997-01-28|Sumitomo Electric Industries, Ltd.|Coated hard alloy tool|
    US5512235A|1994-05-06|1996-04-30|General Electric Company|Supported polycrystalline compacts having improved physical properties and method for making same|
    JP3257255B2|1994-06-06|2002-02-18|三菱マテリアル株式会社|Cutting tools made of cubic boron nitride based ultra-high pressure sintered material with excellent wear resistance|
    SE509201C2|1994-07-20|1998-12-14|Sandvik Ab|Aluminum oxide coated tool|
    CA2155164C|1994-08-01|2001-07-10|Satoru Kukino|Super hard composite material for tools|
    DE69527236T2|1994-09-16|2003-03-20|Sumitomo Electric Industries|Multi-layer film made of ultra-fine particles and hard composite material for tools that contain this film|
    JP2751873B2|1994-09-22|1998-05-18|住友電気工業株式会社|Indexable insert for milling and milling cutter using the same|
    DE69521410T2|1994-10-04|2001-10-04|Sumitomo Electric Industries|COATED HARD ALLOY|
    JP3866305B2|1994-10-27|2007-01-10|住友電工ハードメタル株式会社|Composite high hardness material for tools|
    JPH08126903A|1994-10-31|1996-05-21|Mitsubishi Materials Corp|Cutting tool made of cubic boron nitride super high pressure sintered material excellent in wear resistance|
    JPH08206902A|1994-12-01|1996-08-13|Sumitomo Electric Ind Ltd|Sintered body tip for cutting and its manufacture|
    US5635247A|1995-02-17|1997-06-03|Seco Tools Ab|Alumina coated cemented carbide body|
    US5643523A|1995-04-18|1997-07-01|Saint-Gobain/Norton Industrial Ceramics Corp.|Method of manufacturing diamond-coated cutting tool inserts|
    ZA963789B|1995-05-22|1997-01-27|Sandvik Ab|Metal cutting inserts having superhard abrasive boedies and methods of making same|
    JPH0911006A|1995-06-22|1997-01-14|Mitsubishi Materials Corp|Cutting tool made of cubic nitride boron group sintered material which provides excellent wear resistance in high-speed cutting|
    SE514177C2|1995-07-14|2001-01-15|Sandvik Ab|Coated cemented carbide inserts for intermittent machining in low alloy steel|
    US5722803A|1995-07-14|1998-03-03|Kennametal Inc.|Cutting tool and method of making the cutting tool|
    US5715030A|1995-11-03|1998-02-03|Vi-Zor Corp.|Anti-glare eye shield|
    US5879823A|1995-12-12|1999-03-09|Kennametal Inc.|Coated cutting tool|
    US5833021A|1996-03-12|1998-11-10|Smith International, Inc.|Surface enhanced polycrystalline diamond composite cutters|
    JPH10114575A|1996-10-04|1998-05-06|Sumitomo Electric Ind Ltd|High hardness sintered compact for tool|
    WO1998024736A1|1996-12-03|1998-06-11|Sumitomo Electric Industries, Ltd.|High-pressure phase boron nitride base sinter|
    SE511211C2|1996-12-20|1999-08-23|Sandvik Ab|A multilayer coated polycrystalline cubic boron nitride cutting tool|
    JPH10182233A|1996-12-25|1998-07-07|Agency Of Ind Science & Technol|Titanium aluminum nitride-base sintered material and its production|
    JPH10182234A|1996-12-25|1998-07-07|Agency Of Ind Science & Technol|Cubic boron nitride-base sintered material and its production|
    US6045440A|1997-11-20|2000-04-04|General Electric Company|Polycrystalline diamond compact PDC cutter with improved cutting capability|
    US20010016273A1|1998-05-08|2001-08-23|Krishnan Narasimhan|Multilayer cvd coated article and process for producing same|
    JP3449222B2|1998-06-23|2003-09-22|株式会社村田製作所|Method of manufacturing bead inductor and bead inductor|
    US6316094B1|1998-07-22|2001-11-13|Sumitomo Electric Industries, Ltd.|Cubic boron nitride sintered body|
    JP3573256B2|1998-07-27|2004-10-06|住友電気工業株式会社|Al2O3-coated cBN-based sintered compact cutting tool|
    US6265337B1|1998-12-04|2001-07-24|Sumitomo Electric Industries, Ltd.|High strength sintered body|
    KR100614177B1|1999-02-12|2006-08-21|스미토모덴키고교가부시키가이샤|High Strength Sintered Impact Having Excellent Resistance to Cratering|
    JP2000247746A|1999-02-26|2000-09-12|Kyocera Corp|Cutting tool of cubic boron nitride-based sintered compact|
    US6599062B1|1999-06-11|2003-07-29|Kennametal Pc Inc.|Coated PCBN cutting inserts|
    US6140262A|1999-07-27|2000-10-31|Smith International, Inc.|Polycrystalline cubic boron nitride cutting tool|
    ZA200007090B|1999-12-03|2001-06-06|Sumitomo Electric Industries|Coated PCBN cutting tools.|
    WO2001066492A1|2000-03-08|2001-09-13|Sumitomo Electric Industries, Ltd.|Coated sinter of cubic-system boron nitride|
    US6884496B2|2001-03-27|2005-04-26|Widia Gmbh|Method for increasing compression stress or reducing internal tension stress of a CVD, PCVD or PVD layer and cutting insert for machining|
    WO2003089172A1|2002-04-19|2003-10-30|Mitsubishi Materials Corporation|Cubic boron nitride base ultra-high pressure sintered material cutting tip|
    JP4344616B2|2002-02-21|2009-10-14|エレメントシックス（プロプライエタリイ）リミテッド|Tool insert|
    EP1553210B1|2002-08-08|2014-05-28|Kabushiki Kaisha Kobe Seiko Sho|PROCESS FOR PRODUCING ALUMINA COATING COMPOSED MAINLY OF a-TYPE CRYSTAL STRUCTURE|
    KR101233617B1|2003-06-03|2013-02-14|산드빅 인터렉츄얼 프로퍼티 에이비|Indexable cutting inserts and methods for producing the same|
    JP4160898B2|2003-12-25|2008-10-08|住友電工ハードメタル株式会社|High strength and high thermal conductivity cubic boron nitride sintered body|
    US7455918B2|2004-03-12|2008-11-25|Kennametal Inc.|Alumina coating, coated product and method of making the same|
    JP4398287B2|2004-03-17|2010-01-13|住友電工ハードメタル株式会社|Surface coated cutting tool|
    JP2005335040A|2004-05-31|2005-12-08|Sumitomo Electric Hardmetal Corp|Surface coating cutting tool|
    JP2006055950A|2004-08-20|2006-03-02|Tungaloy Corp|Coated cutting tool|
    JP5486159B2|2004-10-29|2014-05-07|エレメントシックス（プロダクション）（プロプライエタリィ）リミテッド|Cubic boron nitride compact|
    KR100576321B1|2004-12-14|2006-05-03|한국야금 주식회사|Cutting tool/an abrasion resistance tool with high toughness|
    SE528696C2|2005-02-25|2007-01-23|Sandvik Intellectual Property|CVD-coated carbide, cermet or ceramic cutter and ways of manufacturing the same|
    SE528929C2|2005-04-18|2007-03-20|Sandvik Intellectual Property|Cut coated with a layer system and method of making this|
    US7799413B2|2005-06-17|2010-09-21|Sandvik Intellectual Property Ab|Coated cutting tool insert|
    SE529023C2|2005-06-17|2007-04-10|Sandvik Intellectual Property|Coated carbide cutter|
    JP4853612B2|2005-09-26|2012-01-11|三菱マテリアル株式会社|Manufacturing method of cutting throwaway tip made of surface coated cermet whose hard coating layer exhibits excellent chipping resistance in high speed cutting|
    SE529290C2|2005-10-28|2007-06-19|Sandvik Intellectual Property|Cut off cubic boron nitride resistant to chipping and breaking|
    JP4883389B2|2005-11-04|2012-02-22|三菱マテリアル株式会社|Surface polishing method for throated surface-coated cermet with a hard coating layer that exhibits excellent chipping resistance in high-speed cutting|
    JP4779611B2|2005-12-02|2011-09-28|三菱マテリアル株式会社|Manufacturing method of surface coated cutting insert|
    JP4849376B2|2005-12-14|2012-01-11|三菱マテリアル株式会社|Manufacturing method of surface-coated cermet cutting tool that exhibits excellent chipping resistance in high-speed cutting of difficult-to-cut materials|
    SE530189C2|2006-04-25|2008-03-25|Seco Tools Ab|Thread cutter with full surface of PCBN as well as threading tools and thread forming method|
    SE530735C2|2006-10-18|2008-08-26|Sandvik Intellectual Property|A coated carbide cutter, especially useful for turning steel|
    US8557406B2|2007-06-28|2013-10-15|Kennametal Inc.|Coated PCBN cutting insert, coated PCBN cutting tool using such coated PCBN cutting insert, and method for making the same|
    US8507082B2|2011-03-25|2013-08-13|Kennametal Inc.|CVD coated polycrystalline c-BN cutting tools|USD787578S1|2014-01-22|2017-05-23|Sumitomo Electric Hardmetal Corp.|Throw-away tip for metal cutting tool|
    CN107570772B|2017-09-07|2020-04-28|株洲钻石切削刀具股份有限公司|Cutting insert having a plurality of different coatings on a surface thereof|
    法律状态:
    2015-11-17| NAV| Patent application has lapsed|
    优先权:
    申请号 | 申请日 | 专利标题
    US13/739,876|US9028953B2|2013-01-11|2013-01-11|CVD coated polycrystalline c-BN cutting tools|
    [返回顶部]