• 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:
    1452697 Hard facing layers by exothermic reaction USS ENGS & CONSULTANTS Inc 6 Feb 1974 [15 Feb 1973] 05505/74 Heading C7F A hard facing layer is formed by igniting on the substrate an exothermic reaction powder mixture comprising an exothermic fuel, a reducible metal oxide and a boron component which or the boron of which forms a boron compound with the reduced metal. The exothermic mixture preferably contains 65-85 parts wt. Fe 2 O 3 or Fe 3 O 4 minus 35 mesh, 15-35 parts wt. Al minus 20 plus 325 mesh and sufficient ferraboron to provide 2-8% boron. The preferred hard facing composition contains 20-90% volume Fe 2 B and is at least 0À1" thick. The boron source may be B 2 O 3 or FeB or Fe 2 B; the fuel may be Al, Mg, Ca, Si, CaSi or mixtures of these and Cr 2 O 4 may be added to the iron oxide to form a stainless steel matrix. The substrates may be Fe, Cu, Sn, Ni, Cr, Co, Mo, steels, brasses or bronzes and is preferably pre-heated to 1400-2000‹F prior to igniting the powder charge.
    公开号:SU784798A3
    申请号:SU1999140
    申请日:1974-02-14
    公开日:1980-11-30
    发明作者:Генри Качик Роберт；Джон Пигнокко Артур
    申请人:Юсс Инджинирз Энд Консалтантс, Инк (Фирма)；
    IPC主号:
    专利说明:

    (54) METHOD OF OBTAINING WEAR RESISTANT
    COATINGS ON THE METAL SURFACE
    one
    The invention relates to the field of chemical-heat treatment of metal products and can be used in the preparation of wear-resistant coatings on the details of crushing machines, balers, grooves of screens, operating under abrasion conditions at 500-890 ° C.
    A known method of producing a wear-resistant coating on a metal surface, the provision of ignition on the surface of an exothermic mixture containing reducing oxide of at least one metal forming the base, and a saturating component, which can be used as boron.
    The disadvantage of the known method is that boronization takes place at a shallow depth, since boron in the paste diffuses into the surface of the base, eliminating the use of a layer of paste for saturation with boron and the base layer to form an additional reinforcement coating.
    There is also known a method of obtaining a wear-resistant coating on a metal surface, including
    application of a single layer on the surface of the energy release of the paste of iron and aluminum oxide in a mixture with a diffusion-active boron-containing component, ignition of the paste and borization during the combustion process 2J.
    The method allows to intensify diffusion processes, however, it does not provide a sufficiently high
    10 wear resistance of parts operating under abrasion and impact conditions at 500-8900s.
    The known method is closest to the invention in its technical essence and the effect achieved.
    The aim of the invention is to increase wear resistance at elevated temperatures.
    20 To achieve this goal, a method has been proposed, including applying an energy-releasing paste made of iron oxide and aluminum in a mixture with a diffusion-active boron-containing component onto the surface, igniting the paste, and boroning in the combustion process, in which one of the compounds is taken as boron-containing selected from the group: boron ferro3Q, boric oxide, and the compound
     are introduced into the paste: the calculation of the calculation 0.914, 8 weight.h. boron in the mixture; boron oxide is introduced in the amount of 2.9-15.3 parts by weight. and ferrobor is introduced into the paste in the amount of 6.4-60.0 parts by weight.
    The essence of the method consists in the fact that when applied to a metal surface crushing decks or other products experiencing intense wear at elevated temperature and enhanced abrasive action, a layer of paste containing ferroboron or boric oxide at the rate of 0.9-4.8 weight.h . boron mixed with iron oxide and aluminum, and ignition of the paste, accompanied by aluminothermic reduction, leads to the formation of a metallurgically bound to the base of the ferroboric coating. The surface to be covered can be formed from ferrous metal of any desired configuration. Upon receiving the coating, a screen of refractory material is placed around the perimeter of the surface to be treated, and an energy release paste is usually placed between the surface and the screen of at least about 12 mm thick.
    FIG. Figure 1 shows schematically a refractory-lined screen and the necessary materials, respectively, p & folded for the implementation of the method, a vertical section, FIG. 2 — assembly after aluminothermal recovery; in fig. 3 - product, section; in fig. 4 shows a screen with a modified configuration, section / in FIG. 5 is a graph of wear resistance versus boron content in a hard coating.
    The steel base 1 is placed on the sand bed 2 and the level of sand is raised above the level of the upper surface of the base. The refractory-lined screen consisting of a steel outer part 3 with a flange and a refractory lining 4, which in the particular case is made of graphite, has an internal dimension corresponding to the outer dimensions of the steel base. The screen is set on the sand lodge. An aluminothermic reducing charge of energy releasing paste 5 containing iron oxide, ferroboron or boron oxide and aluminum is placed inside the screen on a base, which is a coating, which is coated on KOTOR9J. The thickness of the layer is chosen in the range of 12-260 mm.
    In a number of cases, graphite plates 6 are placed on top of the screen, in one of which a hole 7 is made to introduce a charge. The plates serve to prevent the charge from spilling out, to retain the heat of charge reaction and to make it more fully used for ootjasoBaHHsi coating. Dawn vosg-: lame yu ordinary sioobggshi
    Other fuels besides aluminum may be magnesium, calcium, silicon, or calcium alloy with silicon. This fuel can be replaced with a piece of aluminum powder. The charge consists of approximately three parts of iron oxide, preferably (another iron oxide Fe-jjO having a particle size of at least 35 mesh) can be taken, one part of aluminum powder with a particle size of (-20) - (+ 325) mesh and ferroboron at the rate of 0.9-4.8 weight.h. boron in the mixture. Ferroboron is introduced in the form of -20 mesh pellets.
    The result of the exothermic reaction is the formation of a dense metal layer of coating 8 metallurgically bonded to the base. A less dense layer of slag 9 is collected on top of the metal layer. After completion of the reaction, the graphite plates 6 are removed from the refractory screen. A layer of sand or other material is added to the crust of the slag to facilitate the separation of the coated base. The coating material hardens from the bottom, and this contributes to the formation of a durable non-porous layer. The surface of the product can be cooled before the solid surface layer hardens. The slag is removed by sabotage and the surface of the product is coated with a boron-rich surface.
    As can be seen from the graph in FIG. 5, the addition of boron to the hardened surface improves wear resistance until the maximum wear resistance is reached, which occurs at a boron content of about 5.5%, and with a boron content of up to 7-8%, no improvement in wear resistance is observed. A further increase in the boron content leads to the preservation of wear resistance by ne-emaina, however this increase leads to embrittlement of the surface.
    Thus, to achieve the goal, the boron content should correspond to 0.9-4.8 parts by weight of it in the mixture.
    By the proposed method, a ferroborne coating is obtained, which in the bulk is iron containing 20-90 vol.% FejB, preferably 45-80 vol% Fe / j, B, with an optimal range of 60-80 vol% Fei2B. The coating has a thickness of 2.5-6.2 r / iM.
    The coating can be obtained not only on the steel surface, but also on copper, tin, nickel, chrome, cobalt, molybdenum, brass, bronze, razk1-Chy x ferroalloys and alloyed steel.
    The surface to be coated may be heated before being placed on a sand bed to 780-1100 ° C.
    The coatings obtained by the proposed method on parts intended for sintering plants (fencing, crushing decks, coke pushers) show high wear resistance of working surfaces under operating conditions at and above.
    权利要求:
    Claims (3)
    [1]
    Invention Formula
    A method for producing a wear resistant coating on a metal surface, comprising applying to the surface an energizing paste made of iron oxide and aluminum in a mixture with a diffusively active boron-containing component, igniting the paste and boiling during the combustion process, which is different in that with the aim of increasing the wear resistance at elevated temperatures, as a bleach-containing component, one of the compounds selected from the group of ferroboron, boric oxide is taken, and the compound is introduced into the pas: from the calculation of 0.95 4.8 parts by weight boron in the mixture.
    [2]
    2. Method POP1, characterized in that the boron oxide is introduced in an amount of 2.9-15.3 parts by weight.
    [3]
    3. Method POP.1, distinguishes 0 y and p. the fact that the ferroboron introduced
    to the paste in the amount of 6.4-60.0 parts by weight
    Sources of information taken into account in the examination of 5 The structure and properties of metal alloys. Issue 136, Riga, 1969, p. 88-110.
    2. USSR author's certificate 171876, cl. C 23 C 17/00, 1964.
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    同族专利:
    公开号 | 公开日
    CS212742B2|1982-03-26|
    FR2217433B1|1980-11-28|
    JPS597787B2|1984-02-21|
    FR2217433A1|1974-09-06|
    JPS57174460A|1982-10-27|
    BE810989A|1974-08-13|
    DE2406579A1|1974-08-29|
    GB1452697A|1976-10-13|
    US3963451A|1976-06-15|
    IT1004966B|1976-07-20|
    CA1042321A|1978-11-14|
    JPS50110938A|1975-09-01|
    JPS5756552B2|1982-11-30|
    ES423234A1|1976-12-16|
    US4131473A|1978-12-26|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US1596888A|1922-11-07|1926-08-24|Pacz Aladar|Process and composition of matter for increasing the fluidity of molten metal|
    US2337314A|1943-04-08|1943-12-21|Metal & Thermit Corp|Aluminothermic method and articles of manufacture|
    GB673605A|1950-08-29|1952-06-11|K & L Steelfounders And Engine|Improvements in or relating to casting or moulding processes and to heat producing materials for use in such processes|
    US2798818A|1954-03-15|1957-07-09|Exomet|Moldable exothermic compositions|
    US3222228A|1962-06-28|1965-12-07|Crucible Steel Co America|Method of boronizing steel|
    US3151001A|1962-12-04|1964-09-29|United States Steel Corp|Method of treating boron coated steel to eliminate luders' bands|
    US3428442A|1966-09-22|1969-02-18|Eutectic Welding Alloys|Coated spray-weld alloy powders|
    US3579415A|1967-06-29|1971-05-18|Nat Res Corp|Structural laminates|
    US3622402A|1969-02-04|1971-11-23|Avco Corp|Erosion-corrosion resistant coating|
    DE2006540A1|1970-02-13|1971-08-26|Inst Haerterei Technik|Brake and / or clutch|
    US3743533A|1971-10-28|1973-07-03|G Yurasko|Flame spraying|
    US3867155A|1973-10-31|1975-02-18|Cons Ceramic Products|Smokeless exothermic hot topping compositions|US4285640A|1978-08-03|1981-08-25|Kabushiki Kaisha Toyoda Jidoshokki Seisakusho|Swash plate type compressor|
    JPH0115458Y2|1984-09-27|1989-05-09|
    WO1990011154A1|1989-03-21|1990-10-04|Institut Strukturnoi Makrokinetiki Akademii Nauk Sssr|Method of making a laminated article with wear-resistant surface|
    IL96311A†|1989-12-01|1995-05-26|Abbott Lab|Sustained-release drug dosage units|
    US5112654A|1990-06-25|1992-05-12|Lanxide Technology Company, Lp|Method for forming a surface coating|
    US5376421A|1991-08-30|1994-12-27|University Of Cincinnati|Combustible slurry for joining metallic or ceramic surfaces or for coating metallic, ceramic and refractory surfaces|
    WO1994016859A1|1993-01-25|1994-08-04|University Of Cincinnati|Combustible slurry for joining metallic or ceramic surfaces or for coating metallic, ceramic and refractory surfaces|
    US6156443A|1998-03-24|2000-12-05|National Research Council Of Canada|Method of producing improved erosion resistant coatings and the coatings produced thereby|
    US6602550B1|2001-09-26|2003-08-05|Arapahoe Holdings, Llc|Method for localized surface treatment of metal component by diffusion alloying|
    AU2003225753A1|2002-03-12|2003-09-29|Jerry N. Mcmicken|Extending the life of an amorphous hardface by introduction of pellets|
    DE102007058472B3|2007-12-04|2009-05-07|Uhde Gmbh|Apparatus and method for low-heat expressing coke oven ovens|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US05/332,987|US3963451A|1973-02-15|1973-02-15|Method of forming a high-temperature abrasion-resistant coating on a ferrous metal substrate, and resulting article|
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