Gears and its process of manufacture
    4.
    发明申请
    Gears and its process of manufacture 有权
    齿轮及其制造工艺

    公开(公告)号:US20120247249A1

    公开(公告)日:2012-10-04

    申请号:US13064685

    申请日:2011-04-08

    IPC分类号: F16H55/17 C23C8/80

    CPC分类号: H01L51/107 H01L51/052

    摘要: A method of manufacturing a gear, and the resulting gear, the method resulting such that the surface layer portions of the tooth portions and a tooth root portion are made to be a carburized layer, the remaining portion of the tooth portions and a portion of a disk portion lying below the carburized layer be a quench-hardened layer, and a region of the disk portion lying deeper than the quench-hardened layer be an unquenched layer. The gear is manufactured using raw material steel having the following chemical composition: C: 0.1% to 0.40% (% by mass), Si: 0.35% to 3.0%, Mn: 0.1% to 3.0%, Cr: less than 0.2%, Mo: 0.1% or less, P: 0.03% or less, S: 0.15% or less, Al: 0.05% or less, N: 0.03% or less, and Fe and unavoidable impurities.

    摘要翻译: 一种制造齿轮的方法以及所得到的齿轮,使得齿部的表层部分和齿根部分成为渗碳层,其余​​部分和一部分 位于渗碳层下方的圆盘部分是淬火硬化层,并且位于比淬火硬化层更深的盘部分的区域是非淬火层。 使用具有以下化学组成的原料钢制造齿轮:C:0.1〜0.40%(质量%),Si:0.35〜3.0%,Mn:0.1〜3.0%,Cr:小于0.2% Mo:0.1%以下,P:0.03%以下,S:0.15%以下,Al:0.05%以下,N:0.03%以下,Fe和不可避免的杂质。

    STEEL PART EXCELLENT IN TEMPER SOFTENING RESISTANCE
    7.
    发明申请
    STEEL PART EXCELLENT IN TEMPER SOFTENING RESISTANCE 审中-公开
    钢部件优秀的耐温耐受性

    公开(公告)号:US20120318408A1

    公开(公告)日:2012-12-20

    申请号:US13581636

    申请日:2011-04-14

    摘要: The present invention relates to a steel part securing temper softening resistance at 300° C. characterized by (a) the content of Si in the steel being made 0.7% or more, (b) the content of C in the carburized layer being made 0.9 to 1.1% for a hyper eutectic content of C by carburization, (c) the carbides with an outside diameter of 0.1 μm or more (proeutectoid cementite or spherical carbides) not being allowed to be present after carburization, and (d) the amount of residual austenite after carburization, quenching, and tempering being made less than 30%.The gist lies in a steel part excellent in temper softening resistance which is comprised of steel containing predetermined ingredients, has a total content of Mn and Cr of 2.5% or less, and is carburized, quenched, and tempered on its surface, which has a content of C at a part at a 50 μm depth from the surface of 0.9 to 1.1%, does not contain proeutectoid cementite or spherical carbides of an average diameter of 0.1 μm or more or even if containing it, has an area ratio of it of less than 1%, and, further, does not containing residual austenite or even if containing it, has an area ratio of it of less than 30%.

    摘要翻译: 本发明涉及在300℃下确保回火软化阻力的钢部件,其特征在于:(a)钢中的Si含量为0.7%以上,(b)渗碳层中的C含量为0.9 至c%的超共晶含量为1.1%,(c)渗碳后不允许存在外径为0.1μm以上的碳化物(先共析渗碳体或球形碳化物),(d) 渗碳,淬火和回火后的残余奥氏体不到30%。 要点在于具有优良的耐回火软化性的钢部件,其由含有预定成分的钢组成,Mn和Cr的总含量为2.5%以下,并在其表面上渗碳,淬火和回火,其表面具有 从0.9至1.1%的表面的深度为50μm的部分的C的含量不包含平均直径为0.1μm以上的先共析渗碳体或球形碳化物,或者即使含有它们的面积比, 小于1%,另外不含有残留奥氏体,即使含有残留奥氏体,面积比也小于30%。

    STEEL MATERIAL FOR HARDENING AND METHOD FOR PRODUCING THE SAME
    8.
    发明申请
    STEEL MATERIAL FOR HARDENING AND METHOD FOR PRODUCING THE SAME 有权
    用于硬化的钢材及其制造方法

    公开(公告)号:US20120279616A1

    公开(公告)日:2012-11-08

    申请号:US13520633

    申请日:2011-05-17

    摘要: The present invention provides a steel material for hardening, including chemical components, by mass %, of: C: 0.15 to 0.60%; Si: 0.01 to 1.5%; Mn: 0.05 to 2.5%; P: 0.005 to 0.20%; S: 0.001 to 0.35%; Al: over 0.06 to 0.3%; and total N: 0.006 to 0.03%, with a balance including Fe and inevitable impurities including B of not more than 0.0004%, in which a hardness R at a position 5 mm away from a quenching end measured through a Jominy-type end-quenching method specified in JIS G 0561, and a calculation hardness H at a position 4.763 mm away from the quenching end satisfy the following Equation (1). H×0.948≦R≦H×1.05  Equation (1)

    摘要翻译: 本发明提供一种用于硬化的钢材,包括以质量%计的化学成分:C:0.15至0.60%; Si:0.01〜1.5% Mn:0.05〜2.5% P:0.005〜0.20% S:0.001〜0.35%; Al:0.06〜0.3%以上; 总计N:0.006〜0.03%,余量包括Fe和不可避免的杂质,B含量不大于0.0004%,其中通过Jominy型末端淬火测定的淬火端5mm处的硬度R JIS G 0561规定的方法以及距离淬火端4.763mm位置的计算硬度H满足下式(1)。 H×0.948≦̸ R≦̸ H×1.05等式(1)