• 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:
    A method for nitriding materials using a glow discharge in an atmosphere of nitrogen or gas mixture at a pressure between 1 . . . 100 mtorr (0.13 . . . 13.3 Pa). Nitriding treatment can be combined with a plasma aided coating process and the temperature control during both processes can be achieved with the aid of separate filament. Nitriding unit can be a separate rig or a part of the coating unit. The method can be used to increase the wear resistance of a work piece by increasing the hardness of its surface. Because of the low pressure used in the nitriding process the same equipment can be used to produce a separate hard and wear resistant compound or alloy coating on the nitrided surface to further increase the hardness of the uppermost surface. The main field of the method is in increasing the wear and corrosion resistance of machine parts and tools.
    公开号:SU1373326A3
    申请号:SU823494861
    申请日:1982-09-28
    公开日:1988-02-07
    发明作者:Самули Корхонен Антти；Хейкки Сирвио Эро；Сеппо Сулонен Мартти；Антеро Сундквист Хейкки
    申请人:Кюми Кюммене Ой (Фирма)；
    IPC主号:
    专利说明:

    00

    with so
    YU
    Oi

    cm
    The invention relates to metallurgy, namely chemical heat treatment in a glow discharge plasma, and can be used in mechanical engineering for surface strengthening of machine parts.
    The aim of the invention is to intensify the nitriding process and increase the microhardness of the diffusion layer.
    Figure 1 is a diagram of the device used by the method; Figures 2 and 3 show a comparative distribution of microhardness over the thickness of a non-diffusion layer on samples of 34KhM5Y steel and high-strength low-alloy steel containing 0.05% C and 4.4% Cg after nitriding in a nitrogen hydrogen plasma at 450 ° C for 4 h; Fig. 4 is a diagram of the microhardness distribution over the layer thickness after nitriding at 400, 500 for 5 hours.
    The vacuum chamber 1, in which the treatment is carried out, is evacuated by means of a pump 2. The workpiece 3 is connected with a bolt 4 to a cathode
    The cathode is insulated from the walls of the chamber by means of an insulating sleeve 6 and separated from the surrounding space by a spark-proof coating.
    The cathode is negatively polarized through the conductor 7 from the voltage source 8. The walls of the chamber are attached to the positive pole of the source by conductor 9.
    The temperature of the treated product is regulated using thermocouple 10.
    The recording device 11 is placed in a separate casing 12 in isolation from the surrounding space.
    The cathode is surrounded by a screen 13, which limits the glow around the workpiece 3. The gas mixture in the collector 14 is directed to the vacuum chamber I. The intensity of the glow discharge is regulated by means of a hot filament 15, which is connected by means of an independent voltage source 17 . The conductors are insulated from the housing. Negative voltage is fed through conductor 18 to the filament from source 19. To obtain a negative potential on the filament, a vacuum chamber 1 is attached
    0
    five
    five
    0
    thirty
    .
    to the positive pole 20 of the source 19.
    The method is carried out as follows.
    The hydrogen-hydrogen mixture is introduced into the working chamber up to a pressure of 0.13–13.3 Pa, ignited between the cathode product and the anode working chamber, a glow discharge when the source voltage is 9–4 kV and leads to heating the cathode product to 450 ... 580 ° C, after which they are aged at this temperature.
    The temperature of the product in the process of heating and holding is controlled by means of a negative voltage of up to -200V applied to the thread 15.
    In the process of plasma nitriding at pressures O, 13 ... 13.3 Pa, by increasing the intensity of the full bombardment, the diffusion time is reduced, and the possibility of arcing is reduced, which improves the stability of the process. Samples of high-strength low-alloyed steel containing 0.05% С and 4.4% Сg (steel 1), and steel 34ХМ5Ю (steel 2). Nitriding is carried out in a nitrogen-hydrogen mixture with the addition of argon at 450 ° C for 4 h.
    The results are shown in the table.
    权利要求:
    Claims (1)
    [1]
    From the analysis of the experimental data given in the table, it follows that the thickness of the hardened layer ((, 600) after processing by the proposed method increases by 1.5–3 times on high-strength low-alloyed steel containing 0.05 / sC and 4.4% Cr , 40 and 1.2-1.5 times on steel 34XM5Y. Formula of invention
    The method of nitriding steel products in glow discharge, including heating the product of a cathode placed in a working chamber-anode d5, in a nitrogen-hydrogen plasma up to 450 ... and subsequent exposure at this temperature, characterized in that, in order to intensify the nitriding process and increase microhardness of the diffusion layer, nitriding is carried out at a pressure of O, 13 ... 13, ZPa, while during the treatment process additional glow plasma is ionized by heating a helix attached to a separate negative electrode with a potential of up to 200 V relative to the working anode chamber.
    five
    1 80 20
    55 20 25
    30 20 50
    16 74
    80 20
    55 20
    25
    1350 800
    30 20 50
    1280,620
    16 74
    480
    Note. In the numerator - after processing on the proposed
    the way in the denominator is by the known.
    A80
    400
    390
    420
    400
    380
    400
    350
    340
    340
    tjeo
    O.IO.Z0.3
    Distance from no6epjrnocmu, mm
    Pu. 2
    HIGH - STRENGTH LOW - ALLOY STEEL PLASMA NITRIDiD AT 450 ° C
    a / Q.I0.3
    Dissolving from the surface, mm Fig.Z
    KHN 0.5
    PP NITRIDING IN PLA SMA FOR S / i
    t 0, 10.20.30.4
    Distance from the surface, mm Fig. four
    HIGH STRENGTH LOW ALLOW STEEL
    X
    D 500 C
    类似技术:
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    同族专利:
    公开号 | 公开日
    DE3235670A1|1983-04-21|
    SE449877B|1987-05-25|
    GB2109419B|1985-04-17|
    DE3235670C2|1984-08-02|
    FR2513660A1|1983-04-01|
    FI63783B|1983-04-29|
    GB2109419A|1983-06-02|
    JPS5867862A|1983-04-22|
    SE8205582D0|1982-09-30|
    SE8205582L|1983-03-31|
    FI63783C|1983-08-10|
    FR2513660B1|1987-07-03|
    US4460415A|1984-07-17|
    引用文献:
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    WO1992021787A1|1991-05-31|1992-12-10|Kharkovsky Fiziko-Tekhnichesky Institut|Method and device for thermochemical treatment of articles|
    RU2751348C2|2019-12-19|2021-07-13|Федеральное государственное бюджетное образовательное учреждение высшего образования "Восточно-Сибирский государственный университет технологий и управления"|Installation for polymer surface modification in low-temperature smoldering discharge plasma|NL91406C|1950-08-03|
    FR1316654A|1961-12-21|1963-02-01|New way of attaching solid lubricants to metal surfaces|
    DE1621268B1|1967-10-26|1971-06-09|Berghaus Elektrophysik Anst|Process and device for ionitriding high-alloy steels|
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    NL7302515A|1973-02-22|1973-04-25|Cutting edge hardening - esp for safety razor blades using ion plasma|
    JPS52111891A|1976-03-18|1977-09-19|Honda Motor Co Ltd|Method of surface treatment of metal|
    GB1555467A|1976-07-12|1979-11-14|Lucas Industries Ltd|Method of suface treating a component formed of an iron-based olloy|
    JPS53141133A|1977-05-16|1978-12-08|Hitachi Ltd|Ion surface treating process|
    DE2842407C2|1978-09-29|1984-01-12|Norbert 7122 Besigheim Stauder|Device for the surface treatment of workpieces by discharging ionized gases and method for operating the device|
    JPS5597466A|1979-01-16|1980-07-24|Citizen Watch Co Ltd|Ion nitride-production unit|
    JPS5612197A|1979-07-10|1981-02-06|Toshiba Corp|Diaphragm for loudspeaker|
    US4297387A|1980-06-04|1981-10-27|Battelle Development Corporation|Cubic boron nitride preparation|DE3615425C2|1986-05-07|1988-03-31|Thyssen Edelstahlwerke Ag, 4000 Duesseldorf, De|
    CH671407A5|1986-06-13|1989-08-31|Balzers Hochvakuum|
    DE3742317A1|1987-12-14|1989-06-22|Repenning Detlev|METHOD FOR PRODUCING CORROSION, WEAR AND PRESSURE-RESISTANT LAYERS|
    US4878570A|1988-01-25|1989-11-07|Dana Corporation|Surface hardened sprags and rollers|
    FR2630133B1|1988-04-18|1993-09-24|Siderurgie Fse Inst Rech|PROCESS FOR IMPROVING THE CORROSION RESISTANCE OF METAL MATERIALS|
    GB2261227B|1991-11-08|1995-01-11|Univ Hull|Surface treatment of metals|
    US5380547A|1991-12-06|1995-01-10|Higgins; Joel C.|Method for manufacturing titanium-containing orthopedic implant devices|
    DE4416525B4|1993-05-27|2008-06-05|Oerlikon Trading Ag, Trübbach|Method for producing a coating of increased wear resistance on workpiece surfaces, and its use|
    WO1995029269A1|1994-04-22|1995-11-02|Innovatique S.A.|Method of low pressure nitriding a metal workpiece and oven for carrying out said method|
    FR2719057B1|1994-04-22|1996-08-23|Innovatique Sa|Process for the nitriding at low pressure of a metallic part and oven for the implementation of said process.|
    JP2989746B2|1994-07-19|1999-12-13|株式会社ライムズ|Steel-based composite surface-treated product and its manufacturing method|
    FR2747398B1|1996-04-12|1998-05-15|Nitruvid|METHOD FOR THE SURFACE TREATMENT OF A METAL PART|
    US6605160B2|2000-08-21|2003-08-12|Robert Frank Hoskin|Repair of coatings and surfaces using reactive metals coating processes|
    WO2002019379A1|2000-08-28|2002-03-07|Institute For Plasma Research|Device and process for producing dc glow discharge|
    US7137190B2|2002-10-03|2006-11-21|Hitachi Global Storage Technologies Netherlands B.V.|Method for fabricating a magnetic transducer with a corrosion resistant layer on metallic thin films by nitrogen exposure|
    EP2351869A1|2002-12-20|2011-08-03|COPPE/UFRJ - Coordenação dos Programas de Pós Graduação de Engenharia da Universidade Federal do Rio de Janeiro|Hydrogen diffusion barrier on steel by means of a pulsed-plasma ion-nitriding process|
    EP1612290A1|2004-07-02|2006-01-04|METAPLAS IONON Oberflächenveredelungstechnik GmbH|Process and apparatus for gaseous nitriding of a workpiece and workpiece.|
    US7347136B2|2005-12-08|2008-03-25|Diversified Dynamics Corporation|Airless sprayer with hardened cylinder|
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    JP5944797B2|2012-09-03|2016-07-05|株式会社結城高周波|Iron-based alloy material and method for producing the same|
    WO2017122044A1|2016-01-13|2017-07-20|Ion Heat S.A.S|Equipment for ion nitriding/nitrocarburizing treatment comprising two furnace chambers with shared resources, able to run glow discharge treatment continuously between the two chambers|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FI813032A|FI63783C|1981-09-30|1981-09-30|FOERFARANDE FOER NITRERING VID LAOGT TRYCK MED HJAELP AV GLIMURLADDNING|
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