• 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 non-alloy steel component is nitrocarburized at 550 to 720°C for up to 4 hours in a nitriding gaseous atmosphere eg. ammonia or ammonia and endothermic or exothermic gas, and is thus exposed to an oxidising atmosphere for 2 to 120 seconds to form an oxide-rich layer thereon before being quenched into an oiltwater emulsion, degreased and a tack-free wax coating applied. Alternatively, the component may be cooled in an oxidising atmosphere and then wax coated or it may be cooled in a non-oxidising atmosphere and then reheated to provide the oxide-rich surface layer before being cooled again and wax coated. As a further alternative, the component may be cooled, lapped to a surface roughness of not more than 0.2 micrometres Ra, reheated to oxidise and then quenched. These techniques give a good corrosion resistance to the component.
    公开号:SU1407404A3
    申请号:SU823504253
    申请日:1982-10-14
    公开日:1988-06-30
    发明作者:Дос Кирилл；Давид Смит Джон
    申请人:Лукас Индастриз Паблик Лимитед Компани (Фирма)；
    IPC主号:
    专利说明:

    four

    s
    The invention relates to methods for machining steel parts, in particular, from unalloyed steels having a high corrosion bone.
    The purpose of the invention is to increase the corrosion resistance of the part.
    The method is carried out as follows.
    The workpieces are heated to 550-720 seconds for 4 hours in a nitrating gaseous medium to obtain a surface layer of nitride iron iron up to 25 microns thick and then held in an oxidizing atmosphere to form a layer of iron oxide Fe, 04 thickness 0 , 2-1 microns. Subsequent cooling (quenching) 1 | is carried out in a water - oil emulsion After being quenched in a water - oil emulsion, the details look like a black surface. Air or another oxidative atmosphere is used as the oxidizing atmosphere.
     In addition, after heating, and you —– in a nitrating medium, are suspended in a non-oxidizing medium. In the oxidizing atmosphere after heating to 350–550 ° C, they are held in an air or other oxidizing atmosphere for 2,120 C.
    Parts processed by the proposed method, have resistance to salt fog at 240 h, in
    ts 96
    while, according to the known, less than an hour. These parts have a low friction coefficient, have high superficial tension.
    0
    five
    0
    five
    0
    five
    0
    权利要求:
    Claims (4)
    [1]
    Formula invented and
    1 "A method of manufacturing a steel part, predominantly corrosion-resistant, from non-alloy steel, including heating and hardening ;. in the nitrogenous atmosphere of the gas medium. To obtain a surface layer of epsilon iron nitride, the surfactant is in an oxidizing atmosphere to form a layer of iron oxide and cooling, characterized in that, in order to improve corrosion resistance, the aging in an oxidizing medium is carried Jelly - for a thickness of 0.2-1 microns,
    [2]
    2, the method according to claim 1, wherein the cooling is carried out in a water-in-oil emulsion,
    [3]
    The method according to claim 1, characterized in that the suspension is carried out with cooling in an air or other oxidizing atmosphere,
    [4]
    4. The method according to claim 1, characterized in that after heating and lashing in a nitrating medium, cooling is carried out in a non-oxidizing medium, and losing in an oxidizing atmosphere is carried out after reheating to 350-550 ° C in an air or other oxidizing atmosphere -120 s
    Priority points:
    15..10.81 under item 1;
    18.12c81 under item 2;
    26.02.82 under item 3;
    15. 07.82 Po 4.
    类似技术:
    公开号 | 公开日 | 专利标题
    SU1407404A3|1988-06-30|Method of manufacturing a steel part
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    DE3484960D1|1991-09-26|METHOD FOR THE PRODUCTION OF RECTIFIED SILICON STEEL SLAMS WITH AN EXCELLENT SURFACE AND EXCELLENT MAGNETIC PROPERTIES.
    JPH05239544A|1993-09-17|Heat treatment for adi parts excellent in corrosion resistance
    JPS61243120A|1986-10-29|Production of steel foil having excellent workability and adhesiveness
    JPH02163397A|1990-06-22|Method for surface-finishing stainless steel sheet
    同族专利:
    公开号 | 公开日
    AU8938382A|1983-04-21|
    US4496401A|1985-01-29|
    DE3277460D1|1987-11-19|
    EP0077627A2|1983-04-27|
    IN157874B|1986-07-12|
    US4596611A|1986-06-24|
    DE3280464T2|1995-05-24|
    PL139312B1|1987-01-31|
    ES516577A0|1984-01-16|
    PL238640A1|1983-05-09|
    ES8402027A1|1984-01-16|
    JPH0699796B2|1994-12-07|
    YU43100B|1989-02-28|
    AU555300B2|1986-09-18|
    EP0077627B1|1987-10-14|
    YU232882A|1985-03-20|
    EP0077627A3|1984-10-10|
    BR8206004A|1983-09-13|
    DE3280464D1|1995-02-16|
    JPS6452054A|1989-02-28|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    GB8131133|1981-10-15|
    GB8138318|1981-12-18|
    GB8205999|1982-02-26|
    GB8220495|1982-07-15|
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