Steel for nitriding and nitrided part
    3.
    发明授权
    Steel for nitriding and nitrided part 有权
    用于氮化和氮化部分的钢

    公开(公告)号:US08876988B2

    公开(公告)日:2014-11-04

    申请号:US13702285

    申请日:2011-11-17

    摘要: The present invention provides a steel for nitriding with a composition including, by mass %: C: 0.10% to 0.20%; Si: 0.01% to 0.7%; Mn: 0.2% to 2.0%; Cr: 0.2% to 2.5%; Al: 0.01% to less than 0.19%; V: over 0.2% to 1.0%; Mo: 0% to 0.54%; N: 0.001% to 0.01%; P limited to not more than 0.05%; S limited to not less than 0.2%; and a balance including Fe and inevitable impurities, the composition satisfying 2≦[V]/[C]≦10, where [V] is an amount of V by mass % and [C] is an amount of C by mass %, in which the steel for nitriding has a microstructure containing bainite of 50% or more in terms of an area percentage.

    摘要翻译: 本发明提供一种氮化组成的钢,其含有质量%:C:0.10〜0.20% Si:0.01〜0.7% Mn:0.2〜2.0% Cr:0.2〜2.5% Al:0.01%〜小于0.19%; V:超过0.2%至1.0%; Mo:0〜0.54% N:0.001〜0.01% P限制在不超过0.05%; S限制在0.2%以上; 余量包括Fe和不可避免的杂质,组成满足2≦̸ [V] / [C]≦̸ 10,其中[V]为质量%V,[C]为质量% 其中用于氮化的钢具有以面积百分比计含有贝氏体为50%以上的微结构。

    Gears and its process of manufacture
    7.
    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。

    High strength spring steel wire and high strength spring and methods of production of the same
    8.
    发明申请
    High strength spring steel wire and high strength spring and methods of production of the same 审中-公开
    高强度弹簧钢丝和高强度弹簧及其生产方法相同

    公开(公告)号:US20110310924A1

    公开(公告)日:2011-12-22

    申请号:US13199203

    申请日:2011-08-22

    IPC分类号: G01K17/00

    摘要: The present invention provides high strength spring and high strength spring steel wire superior in corrosion fatigue characteristics and methods of production of the same, that is, a high strength spring steel wire and high strength spring containing, by mass %, C: 0.35 to 0.50%, Si: 1.00 to 3.00%, and Mn: 0.10 to 2.00%, restricting P to 0.015% or less and S to 0.015% or less, having a balance of Fe and unavoidable impurities, and, when raising the temperature in the range from 50° C. to 600° C. by 0.25° C./s and measuring the differential scanning calories, having the only peak of the exothermic reaction present at 450° C. or more. A method of production of high strength spring characterized by tempering under conditions where the tempering temperature T[K], tempering time t[s], and content Si % [mass %] of Si satisfy the following: 16000≦(T−40×[Si %])×(31.7+log t)≦23000.

    摘要翻译: 本发明提供了一种耐腐蚀疲劳特性优异的高强度弹簧和高强度弹簧钢丝及其制造方法,即高强度弹簧钢丝和高强度弹簧,以质量%计含有C:0.35〜0.50 %,Si:1.00〜3.00%,Mn:0.10〜2.00%,将P限制在0.015%以下,S:0.015%以下,余量为Fe和不可避免的杂质,当将温度升高到 从50℃至600℃,0.25℃/秒,并测量差示扫描卡路里,其中放热反应的唯一峰值为450℃或更高。 一种高强度弹簧的制造方法,其特征在于,在回火温度T [K],回火时间t [s]以及Si的含量Si%[质量%]满足以下条件的条件下进行回火:16000≦̸(T-40× [Si%])×(31.7 + log t)≦̸ 23000。

    Steel wire rod for cold forging and method for producing the same

    公开(公告)号:US06547890B2

    公开(公告)日:2003-04-15

    申请号:US09829768

    申请日:2001-04-10

    IPC分类号: C21D806

    摘要: The present invention provides a steel wire rod for cold forging which can be spheroidizing-annealed in an as hot-rolled state without requiring preliminary drawing and can have high ductility after the spheroidizing annealing, and a method to produce the same: and is characterized in that; the steel contains, by weight, 0.1 to 0.5% of C, 0.01 to 0.5% of Si and 0.3 to 1.5% of Mn, with the balance consisting of Fe and unavoidable impurities, and further contains hardening elements as required; and the steel has a prior austenite grain size number, defined under Japanese Industrial Standard (JIS) G 0551, of 11 or higher, the amount of diffusible hydrogen in the steel measured by the programmed temperature gas chromatography being 0.2 ppm or less, and the hardness being Hv 250 to 700. The production method is characterized by: hot rolling the steel at a low temperature; rapidly cooling and tempering the wire rod thus rolled by holding it in a furnace atmosphere controlled in the temperature range of 300 to 600° C. for 15 min. or longer but shorter than 1 h.; and then applying spheroidizing annealing as required.