• 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 flame spray powder mix is provided for producing coatings on metal substrates, such as substrates of steel, cast iron, non-ferrous metals, among other substrates, the powder mix comprising agglomerates of a metallo-thermic heat generating composition (i.e., a thermit composition, such as an alumino-thermic composition) mixed with at least one coating material, such as metal and/or non-metal coating materials.
    公开号:SU1704634A3
    申请号:SU792842702
    申请日:1979-11-21
    公开日:1992-01-07
    发明作者:Юраско Джордж
    申请人:Ютектик Корпорейшн (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to the field of coating on a metal base of steel, cast iron and non-ferrous metals and can be used in mechanical engineering and other industries.
    The purpose of the invention is to increase coating adhesion.
    Metal-thermal powdered mixture for gas-flame spraying contains particles of sprayed material that are uniformly mixed with agglomerates of an exothermic mixture of recoverable metal oxide bound by a strong reducing agent with a strong reducing agent, and the oxide metal has a negative free oxidation energy not exceeding 60 kcal / g-atom at 25 ° C, and the metal-reducing agent has a negative oxidation free energy of not less than 90 kcal / g-oxygen atom, the particles, which enter into the agglomerate, have the size is 1–20 µm, and the size of the agglomerates and the coating material is 30–150 µm, the content of the agglomerates in the mixture is (by weight) 10–80%, and the coating material is 20–90%, the coating material is selected from the group containing metals , gp-kshy, refractory oxides, as well as ffida, silicides, nitrides, refractory borides
    X |
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    metals of the IV, V, and VI groups of the Periodic Table.
    An element from the group comprising iron, nickel, cobalt, copper and alloys based on them can be selected as the coating material.
    The agglomerates of the metalthermal composition can consist of particles of at least one recoverable metal oxide selected from the group of iron and copper oxide, and aluminum can be used as a reducing agent.
    The following metal oxides can be taken as reducing oxides: FeO, Ke2 (e, CoO, NiO, CuzO, Cu () Sb203, Mo () 2, Mo) 3, WOZ, WU3.
    Si, Al, Zr, Be can be used as reducing metals.
    When spraying coatings using the specified metallothermic composition, a flame is formed with an elevated temperature at the sprayed substrate, therefore, the substrate material is overheated to higher temperatures than the flame produced by spraying the mixture according to the prototype. Improved flame performance is achieved due to the spontaneous explosion of each agglomerate with the release of large quantities of heat from the exothermic reaction. Since each agglomerate is evenly mixed with the coating material, particles of the coating material that are also heated to higher temperatures fall on the superheated substrate. All this contributes to a dense coating with good adhesion to the base.
    To form an exothermic agglomerate, finely ground powder -g of a reducible metal oxide is mixed with a reducing metal and with an appropriate amount of an unstable binding agent, such as a resin, or other active substance, such as an alkali metal silicate. One example of a non-stable binding agent is methyl methacrylate dissolved in methyl ethyl ketone.
    The amount of resin used in relation to the total weight of the ingredients is 1-5% (dry matter).
    Other examples of resins that may be used for these purposes are lycrylates, for example methyl 0.
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    methylcrylates, polyvinyl chloride, polyurethane, polyvinyl alcohol, etc.
    The resins are applied as solutions, they are dissolved in compatible volatile organic solutions, such as alcohols, methyl ethyl ketone, xylene, etc., the predetermined amount of the solution is compared with the powdered ingredients and the solvent is evaporated to form bound agglomerates. The resulting agglomerates are sieved through a sieve to isolate a mixture of agglomerates of 5 required sizes (30-150 µm).
    The exothermic mixture can be used in a relatively wide range of compositions. It is desirable that the particles of the metal oxide to be reduced and the reducing agent in the agglomerate have an average size in the range up to 20 µm, most often 2-10 i µm, while the average size of the agglomerate is in the range 30-150 µm.
    In the composition of the heat-forming agglomerate, 30-70 wt.% Of the reduced metal oxide and from 70 to 30 wt.% Of the metallic reducing agent are present, and the content of 40-60 wt.% Of the reduced metal oxide and from 60 to 40 wt.% Of the metallic reducing agent is optimal.
    The content of heat-forming agglomerates in the powder mixture may be in the range of 10-80 wt.%, And the content of the coating material - from 90 to. 20 wt.%, While the optimum is the content of agglomerates 20 - 60 wt. X and from 80 to 40 wt.% Of the coating material.
    When a nickel-aluminum composite is used as part of the sprayed material with a flame of a composition or mixture, it may contain about 75-98 wt.% Nickel and 2-25 wt.% Aluminum, or another cladding metal. It is preferable to use nickel or a nickel alloy powder clad with aluminum in the form of an agglomerate, wherein the two metals are bonded to each other by means of an unstable binder, as described.
    The agglomerate may contain up to 15 wt.% Of refractory substances, such as carbides, borides, silicides and nitrides of metals IV, V and; VI groups of the Periodic system.
    0
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    517046 Agglomerate, along with many other materials, coatings can be mixed with substances such as nickel, cobalt, iron, and copper based alloys. five
    It is preferable to use self-thinning alloys having a melting point of 870-1288 ° C. Self-thinning alloys in their composition g have either 0.5-6% by weight of silicon or 0.5-5% by weight of boron.
    Nickel-based alloy contains, wt%:
    Silicon 1.5-5.0 Boron 1.5-5.0 Chromium 0-20 Molybdenum 0-7 Nickel Else In this alloy, nickel can be replaced by cobalt or iron. Refractory carbides, such as WC, can be added to alloys of this type in the form of fine particles to provide an additional increase in abrasive wear resistance.
    The cobalt-based alloy contains wt.%:
    Nickel1.0-5.0 Chromium 20.0-32.0 Silicon 0.5-3.0 Bor Bor 1.0-3.0 Carbon 0.8-2.0. Tungsten 3.5-7.5 Molybdenum 0-5.0 Cobalt Rest A copper-based alloy contains, in wt.%:
    Nickel15.0-40.0 Silicon 1.0-5.0 Boron 0.15-2.50 Magnesium 0.2-2.0 Copper Else Example 1. A binder powder was formed containing three ingredients: 50 mCo% sinter Ni-Al containing 95% Ni and 5% Al, bonded to each other by unstable bondings that are phenolic resin (2% of the dry weight of the total nickel and aluminum content); 25 wt.% Agglomerated, formed by spraying a mixture of 50% NiO — 50% AI (with particles of 2-10 microns in size) using sodium silicate as a binder; 25% by weight nickel based alloy.
    The average particle size of the agglomerates is 30-150 microns, alloy 3 is 1-105 microns.
    five
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    346
    . The steel surface was sandblasted.
    Example 2o Kila is formed by the following powder mixture, wt%: spray dried NiO-Al agglomerates (50% NiO and 50% A1) 25; Ni-Si alloy containing 93% Ni and 7% Si, a pre-reacted alloy consisting of 95% Ni and 5% A1, 50.
    The average particle size of the powder mixture is 30-150 microns.
    Example 3. The following powder mixture was formed, wt%: a 95% Ni composite — 5% Al (agglomerate) clad with a TiSis compound by means of an adhesive, 50; spray-dried NiO-Al agglomerates (50% NiO and 50% Al) 50.
    The average particle size of the powder mixture is 30-150 microns. |
    The highest quality coatings are obtained by spraying on a steel substrate. However, such a coating can be sprayed onto a base of nickel, cobalt, aluminum alloys, copper, some non-metallic bases.
    权利要求:
    Claims (6)
    [1]
    1. Metal-thermal powder mixture for gas-sprayed coatings containing particles of sprayed material, characterized in that, in order to increase adhesion of the coating, it additionally contains agglomerates of an exo-1-thermal mixture, reduced by a metal oxide bonded through a heat-resistant bonded particle containing a strong reducing agent, the oxide metal having a negative oxidation free energy not higher than 60 kcal / g-atom at 25 ° C, and the reducing metal having a negative free energy oxide Not less than 90 kcal / g oxygen atom, particles entering the agglomerate have a size of 1-20 microns, and the size of the agglomerates and coating material is from 30 to 150 microns, the content of agglomerates in the mixture being (by mass) 10- 80%, and the coating material - 20-90%, the coating material is selected from the group containing, metals, alloys, refractory oxides, as well as carbides, silicides, nitrides
    and On op iv IN the refractory metapont V, V, VI groups of the Periodic Table.
    [2]
    2. A mixture according to i.1, about tl and hl p - y and with the fact that the agglomerate contains wt.% Metapla oxide and 70-30 wt.% Reducing agent.
    [3]
    3. The mixture according to claim 1, in which the content of agglomerates in it is 60 May. /, and the content of the approved material is 80-40 wt.X.
    [4]
    4. The mixture according to claim 1, characterized by the fact that the reduced metal oxide of the agglomerate is selected from
    groups containing an oxide of a metal of an iron group and copper oxide, the reducing agent in the agglomerate is aluminum.
    [5]
    5. The mixture according to claim 1, wherein the metal oxide in the agglomerate is nickel oxide and the reducing agent is aluminum.
    [6]
    6. The mixture according to claim 1, wherein the average size of the coating material in the powder mixture is in the range of from 30 to 150 microns. .
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    同族专利:
    公开号 | 公开日
    BR7907328A|1980-07-08|
    GB2036805A|1980-07-02|
    US4202691A|1980-05-13|
    FR2442279A1|1980-06-20|
    FR2442279B1|1983-09-16|
    DE2946282A1|1980-06-26|
    GB2036805B|1983-04-13|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2904449A|1955-07-26|1959-09-15|Armour Res Found|Method and compositions for flame spraying|
    US2943951A|1956-03-23|1960-07-05|Kanthal Ab|Flame spraying method and composition|
    DE1020506B|1956-07-09|1957-12-05|Metallizing Engineering Co., Inc., Westbury, N. Y. |Process for spraying on fusible, ceramic materials|
    US3050409A|1959-11-30|1962-08-21|Owens Illinois Glass Co|Manufacture of refractory oxide coatings|
    US3322515A|1965-03-25|1967-05-30|Metco Inc|Flame spraying exothermically reacting intermetallic compound forming composites|
    US3617358A|1967-09-29|1971-11-02|Metco Inc|Flame spray powder and process|
    GB1436561A|1973-01-18|1976-05-19|Foseco Int|Repair of ingot mould bottom plates|
    DE2363520C2|1973-12-20|1975-07-17|Th. Goldschmidt Ag, 4300 Essen|Aluminothermic reaction mixture based on copper oxide|
    US4031278A|1975-08-18|1977-06-21|Eutectic Corporation|High hardness flame spray nickel-base alloy coating material|
    US4039318A|1976-07-19|1977-08-02|Eutectic Corporation|Metaliferous flame spray material for producing machinable coatings|JPH0217621B2|1980-05-29|1990-04-23|Nippon Pisutonringu Kk|
    DE3221230A1|1982-06-04|1983-12-08|Central'nyj naučno-issledovatel'skij dizel'nyj institut CNIDI, Leningrad|Powder for applying coatings by gas thermal dust deposition|
    WO1993014044A1|1992-01-16|1993-07-22|University Of Cincinnati|Electrical heating element, related composites, and composition and method for producing such products using dieless micropyretic synthesis|
    US6001236A|1992-04-01|1999-12-14|Moltech Invent S.A.|Application of refractory borides to protect carbon-containing components of aluminium production cells|
    US5310476A|1992-04-01|1994-05-10|Moltech Invent S.A.|Application of refractory protective coatings, particularly on the surface of electrolytic cell components|
    US5651874A|1993-05-28|1997-07-29|Moltech Invent S.A.|Method for production of aluminum utilizing protected carbon-containing components|
    US5449886A|1993-03-09|1995-09-12|University Of Cincinnati|Electric heating element assembly|
    AU2464595A|1994-05-13|1995-12-05|Micropyretics Heaters International|Sinter-homogenized heating products|
    EP0782636B1|1994-09-08|1999-05-06|MOLTECH Invent S.A.|Aluminium electrowinning cell with improved carbon cathode blocks|
    US5753163A|1995-08-28|1998-05-19|Moltech. Invent S.A.|Production of bodies of refractory borides|
    US6494259B2|2001-03-30|2002-12-17|Halliburton Energy Services, Inc.|Downhole flame spray welding tool system and method|
    SE527338C2|2004-06-08|2006-02-14|Totalfoersvarets Forskningsins|Modified Metal Powder Fuel and Ways to Increase Burning Speed and Flammability of Metal Powder Fuel|
    US20090098002A1|2005-09-20|2009-04-16|Kudu Industries Inc.|Process for hardfacing a metal body|
    US8613808B2|2006-02-14|2013-12-24|Surface Treatment Technologies, Inc.|Thermal deposition of reactive metal oxide/aluminum layers and dispersion strengthened aluminides made therefrom|
    CN103952701A|2007-04-17|2014-07-30|苏舍美特科（美国）公司|Protective coatings and methods of forming same|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US05/962,673|US4202691A|1978-11-21|1978-11-21|Metallo-thermic powder|
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