Non-tempered steel for mechanical structure
    11.
    发明授权
    Non-tempered steel for mechanical structure 失效
    用于机械结构的非回火钢

    公开(公告)号:US6036790A

    公开(公告)日:2000-03-14

    申请号:US230403

    申请日:1999-01-25

    CPC分类号: C22C38/12 C22C38/60

    摘要: The medium carbon, microalloyed forging steel for machine structural use has a small deformation upon fracture in a hot-rolled, hot-forged, or any other hot-worked state, has an inexpensive ferrite-pearlitic microstructure and consists of C: 0.3 to 0.6 wt %, Si: 0.1 to 2.0 wt %, Mn: 0.1 wt % or more and less than 0.4 wt %, P: 0.01 to 0.1 wt %, S: 0.01 to 0.2 wt %, V: more than 0.15 wt % and up to 0.4 wt %, and the balance: Fe and unavoidable impurities, in which the unavoidable impurities include less than 0.005 wt % N. The microalloyed forging steel for machine structural use may further contain Al: 0.005 to 0.05 wt %, one or both of Ti: 0.005 to 0.05 wt % and Nb: 0.05 to 0.2 wt %, and/or one or both of Cr: 0.1 to 0.5 wt % and Mo: 0.1 to 0.5 wt %.

    摘要翻译: PCT No.PCT / JP98 / 02306 Sec。 371日期1999年1月25日 102(e)日期1999年1月25日PCT提交1998年5月26日PCT公布。 出版物WO98 / 54372 日期1998年12月3日机械结构用中碳微合金锻造钢在热轧,热锻或其他热加工状态下的断裂变形小,具有廉价的铁素体 - 珠光体组织,由 C:0.3〜0.6重量%,Si:0.1〜2.0重量%,Mn:0.1重量%以上且小于0.4重量%,P:0.01〜0.1重量%,S:0.01〜0.2重量%,V: 0.15重量%以上0.4重量%以下,余量为不可避免的杂质含有小于0.005重量%N的Fe和不可避免的杂质。机械结构用微合金化锻钢可以进一步含有Al:0.005〜0.05重量% ,Ti:0.005〜0.05重量%,Nb:0.05〜0.2重量%,Cr:0.1〜0.5重量%,Mo:0.1〜0.5重量%的一个或两个。

    Carburized and quenched member and method for production thereof
    14.
    发明申请
    Carburized and quenched member and method for production thereof 审中-公开
    渗碳淬火件及其制造方法

    公开(公告)号:US20050173026A1

    公开(公告)日:2005-08-11

    申请号:US10473716

    申请日:2002-12-25

    IPC分类号: C23C8/22 C23C8/80

    CPC分类号: C23C8/22 C23C8/80

    摘要: A carburizing and hardening method enhances strength while sufficiently reducing hardening strain, without increasing the production cost, and a carburized and hardened member produced thereby. The raw material is an alloy steel which contains Fe as a main component, 0.10 to 0.50 wt. % C and 0.50 to 1.50 wt. % Si and having a hardenability J, based on an end quenching test, in a range of 35 to 50 (at 12.5 mm). After the raw material is formed into the desired shape, a carburized layer is formed by carburizing in an oxidation inhibiting atmosphere. After the carburizing, quenching is performed with cooling, uninterrupted by temperature rise, from a pearlite transformation point (A1 point) to a martensite transformation start point (Ms point), and with a severity of quenching H in a range of 0.01 to 0.08 (cm−1).

    摘要翻译: 渗碳硬化方法提高强度,同时充分降低硬化应变,而不增加生产成本,并且由此生产的渗碳硬化构件。 原料是含有Fe作为主要成分的合金钢,0.10〜0.50重量% %C和0.50〜1.50wt。 %Si,并且基于终止淬火试验具有淬透性J,在35〜50(12.5mm)的范围内。 在原料形成所需形状之后,通过在氧化抑制气氛中渗碳形成渗碳层。 渗碳后,从珠光体相变点(A1点)到马氏体相变开始点(Ms点)的冷却不间断地进行淬火淬火,淬火强度H在0.01〜0.08的范围内( cm -1)。

    Carburized and induction-hardened component
    18.
    发明申请
    Carburized and induction-hardened component 有权
    渗碳和感应淬火组分

    公开(公告)号:US20090301608A1

    公开(公告)日:2009-12-10

    申请号:US11919068

    申请日:2006-04-28

    IPC分类号: C23C8/22

    摘要: A steel component formed by carburizing and then induction-hardening of a steel consisting essentially of, by mass, C: minimum 0.08% and less than 0.3%; Si: maximum 2.0%; Mn: from 0.2% to 3.0%; P: maximum 0.03%; S: from 0.005% to 0.05%; Ni: maximum 1.5%; Cr: maximum 3.0%; Mo: maximum 1.0%; O: maximum 0.0025%; and N: from 0.005% to 0.03%; and further including either or both of, by mass, Al: from 0.005% to 0.05%, and Ti: from 0.005% to 0.05%; and still further including either or both of, by mass, V: maximum 0.3%, and Nb: maximum 0.3%; and a balance including Fe and unavoidable impurities. The hardness of the surface layer is at least 55 HRC and the hardness of the core portion is from 20 to 50 HRC. The core portion does not include a martensite structure.

    摘要翻译: 通过基本上以质量计C:最小0.08%且小于0.3%的钢渗碳然后感应硬化而形成的钢部件; Si:最大2.0%; Mn:0.2〜3.0% P:最大0.03%; S:0.005〜0.05% 镍:最高1.5%; Cr:最高3.0%; Mo:最大1.0%; O:最大0.0025%; 和N:0.005〜0.03%。 并且进一步包括以质量计Al,0.005%至0.05%,Ti:0.005%至0.05%中的一种或两种; 并且还进一步包括以下两种或两种:V:最大0.3%,Nb:最大0.3%; 余量包括Fe和不可避免的杂质。 表面层的硬度至少为55HRC,芯部的硬度为20〜50HRC。 核心部分不包括马氏体结构。

    Steels for cold forging and process for producing the same
    19.
    发明授权
    Steels for cold forging and process for producing the same 有权
    用于冷锻的钢和生产相同的工艺

    公开(公告)号:US06419761B1

    公开(公告)日:2002-07-16

    申请号:US09403238

    申请日:1999-10-15

    IPC分类号: C21D800

    CPC分类号: C22C38/02 C22C38/04

    摘要: This invention provides a steel for cold forging, excellent in surface layer hardness and softening properties by annealing, which contains, in terms of wt %, C: 0.1 to 1.0%, Si: 0.1 to 2.0%, Mn: 0.01 to 1.50%, P: not greater than 0.100%, S: not greater than 0.500%, sol. N: not greater than 0.005% and the balance consisting of Fe and unavoidable impurities, wherein a pearlite ratio in the steel structure is not greater than 120×(C %) % and the outermost surface layer hardness is at least 450×(C %)+90 in terms of the Vickers hardness HV, and a production method thereof. The invention provides also a steel for cold forging, which has a structure wherein a ratio of graphite amount to the carbon content in the steel exceeds 20%, a mean grain diameter of graphite is not greater than 10×(C %)⅓ &mgr;m and a maximum grain diameter is not greater than 20 &mgr;m.

    摘要翻译: 本发明提供一种冷锻用钢,表面硬度和退火软化性优异,其含有以C:0.1〜1.0%,Si:0.1〜2.0%,Mn:0.01〜1.50%的重量% P:不大于0.100%,S:不大于0.500%,溶胶。 N:不大于0.005%,余量由Fe和不可避免的杂质组成,其中钢结构中的珠光体比不大于120×(C%)%,最外表层硬度至少为450×(C%)+ 在维氏硬度HV方面为90°,其制造方法。 本发明还提供一种用于冷锻钢的结构,其中石墨量与钢中碳含量的比例超过20%,石墨的平均粒径不大于10x(C%)1/3,而且 最大粒径不大于20um。