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    • 5. 发明授权
    • Process for producing retainer for constant velocity joint possessing improved machinability and flexural strength
    • 用于制造等速万向节保持器的方法具有改进的机械加工性和抗弯强度
    • US06800144B2
    • 2004-10-05
    • US10171415
    • 2002-06-13
    • Hiroshi NishimoriMakoto IguchiYoshimi Usui
    • Hiroshi NishimoriMakoto IguchiYoshimi Usui
    • C23C822
    • C23C8/22
    • Disclosed is a process for producing a retainer for a constant velocity joint for automobiles or the like, which has improved flexural strength properties without sacrificing the machinability, using a steel corresponding to SCr 415 (JIS) or SCM 415 (JIS). This production process comprises the steps of: providing a steel comprising by weight carbon (C): 0.10 to 0.25%, silicon (Si): 0.03 to 0.15%, manganese (Mn): 0.20 to 0.60%, sulfur (S): 0.003 to 0.030%, chromium (Cr): 1.00 to 1.50%, titanium (Ti): 0.05 to 0.20%, boron (B): 0.0005 to 0.0050%, and nitrogen (N): not more than 0.01% with the balance consisting of iron (Fe) and inevitable impurities; hot forging the steel at a heating temperature of 1000 to 1100° C. to prepare a forged product having a Rockwell hardness of not more than 88 HRB; machining and optionally piercing the forged product; carburizing and quenching and tempering the machined steel to attain an effective case depth of 0.4 to 0.9 mm, the effective case depth being defined as the distance from the surface of the steel to the position of the steel in its depth direction where the Vickers hardness is HV 550.
    • 公开了使用对应于SCr 415(JIS)或SCM 415(JIS)的钢,制造汽车等速万向节保持器的方法,其具有改进的抗弯强度性能而不牺牲切削加工性能。 该制造方法包括以下步骤:提供碳(C):0.10〜0.25%,硅(Si):0.03〜0.15%,锰(Mn):0.20〜0.60%,硫(S):0.003 至0.030%,铬(Cr):1.00至1.50%,钛(Ti):0.05至0.20%,硼(B):0.0005至0.0050%,氮(N):不大于0.01%,余量由 铁(Fe)和不可避免的杂质; 在1000〜1100℃的加热温度下对钢进行热锻,制备洛氏硬度为88HBB以下的锻造品; 加工和可选地刺穿锻造产品; 对加工钢进行渗碳淬火回火,达到有效的深度为0.4〜0.9mm的有效深度,有效的深度定义为从钢表面到维氏硬度为深度方向的钢的位置的距离 HV 550。
    • 6. 发明授权
    • Process for producing inner race for constant velocity joint having improved workability and strength
    • 制造具有改善的可加工性和强度的等速万向节内圈的方法
    • US06641680B2
    • 2003-11-04
    • US10171091
    • 2002-06-13
    • Hiroshi NishimoriMakoto IguchiYoshimi Usui
    • Hiroshi NishimoriMakoto IguchiYoshimi Usui
    • C23C822
    • C23C8/80C23C8/22
    • Disclosed is a process for producing an inner race for a constant velocity joint comprising the steps of: providing a steel comprising by weight carbon 0.10 to 0.25%, silicon 0.03 to 0.15%, manganese 0.20 to 0.60%, sulfur 0.003 to 0.030%, chromium 1.00 to 1.50%, titanium 0.05 to 0.20%, boron 0.0005 to 0.0050%, and nitrogen not more than 0.01% with the balance consisting of iron and impurities; hot rolling or hot forging the steel, to prepare a rolled/forged product; cold forging and machining the rolled/forged product; and carburizing, quenching, and tempering the machined rolled/forged product so that the treated steel satisfies an effective case depth of 0.4 to 0.9 mm, a thickness of abnormal-carburizing layer of not more than 15 &mgr;m, and an austenite grain size number as specified in JIS G 0551 of not less than 7.
    • 公开了一种用于制造等速万向节内圈的方法,包括以下步骤:提供一种钢,其包含重量为0.10-0.25%的碳,0.03-0.15%的硅,0.20-0.60%的锰,0.003-0.030%的硫,铬 1.00〜1.50%,钛0.05〜0.20%,硼0.0005〜0.0050%,氮不大于0.01%,余量由铁和杂质组成; 热轧或热锻钢,准备轧制/锻造产品; 冷锻锻造加工锻造产品; 对加工后的轧制锻造品进行渗碳淬火回火,使处理钢的有效表层深度为0.4〜0.9mm,异常渗碳层的厚度为15μm以下,奥氏体晶粒数为 在JIS G 0551中规定为不小于7。