公开(公告)号：US5403545A

公开(公告)日：1995-04-04

申请号：US990802

申请日：1992-12-14

申请人： Yatsuka Takata ,  Akira Muroga ,  Yoshihiro Wakikado ,  Takao Ooki ,  Masao Goto ,  Hazime Tazumi ,  Teruo Hoshino ,  Masayuki Kitamura ,  Toshihiro Kawaguchi ,  Yoshitaka Natsume ,  Akihiro Mizutani

发明人： Yatsuka Takata ,  Akira Muroga ,  Yoshihiro Wakikado ,  Takao Ooki ,  Masao Goto ,  Hazime Tazumi ,  Teruo Hoshino ,  Masayuki Kitamura ,  Toshihiro Kawaguchi ,  Yoshitaka Natsume ,  Akihiro Mizutani

IPC分类号： C22C38/18 ,  C22C38/22 ,  F16C33/30 ,  F16C33/62 ,  C22C38/46 ,  C22C38/60

CPC分类号： F16C33/30 ,  C22C38/18 ,  C22C38/22 ,  F16C33/62

摘要： A bearing steel having long rolling life comprising, by weight, 0.65 to 0.90% of C, 0.15 to 0.50% of Si, 0.15 to 1.0% of Mn and 2.0 to 5.0% of Cr, and the balance of Fe. Austenite grain size can be prevented from becoming coarser to make hardening in high temperature possible by further adding one or more of 0.0090 to 0.0200% of N, 0.010 to 0.050% of Al and 0.005 to 0.500% of Nb as optional elements to the steel. Further, rolling fatigue life can be improved by further adding one or more of 0.20 to 0.50% of Ni, 0.10 to 2.00% Of Mo and 0.05 to 1.00% of V as optional elements, and machinability can be improved by further adding one or more of 0.02 to 0.05% of S, 0.005 to 0.10% of rare earth elements, 0.02 to 0.30% of Pb, 0.0005 to 0.0100% of Ca, 0.001 to 0.200% of Bi, 0.005 to 0.20% of Se and 0.005 to 0.100% of Te in the steel as optional elements.

摘要翻译： 具有滚动寿命长的轴承钢，其中C：0.65〜0.90％，Si：0.15〜0.50％，Mn：0.15〜1.0％，Cr：2.0〜5.0％ 可以通过进一步添加0.0090〜0.0200％的N，0.010〜0.050％的Al和0.005〜0.500％的Nb作为钢的任意元素，可以防止奥氏体晶粒尺寸变粗，使其在高温下硬化。 此外，通过进一步添加0.20〜0.50％的Ni，0.10〜2.00％的Mo和0.05〜1.00％的V作为任选元素，可以提高轧制疲劳寿命，并且可以进一步添加一个或多个 ，0.02〜0.05％的S，0.005〜0.10％的稀土元素，0.02〜0.30％的Pb，0.0005〜0.0100％的Ca，0.001〜0.200％的Bi，0.005〜0.20％的Se和0.005〜0.100％的 在钢中作为可选元素。

公开(公告)号：US4915900A

公开(公告)日：1990-04-10

申请号：US257922

申请日：1988-10-14

申请人： Itie Nomura ,  Takao Ooki ,  Yoshihiro Wakikado

发明人： Itie Nomura ,  Takao Ooki ,  Yoshihiro Wakikado

IPC分类号： C22C38/00 ,  C21D8/00 ,  C22C38/60

CPC分类号： C22C38/60

摘要： A free-cutting steel having a high fatigue strength which consists essentially of 0.30-0.50% C, 0.10-0.50% Si, 0.50-1.00% Mn, 0.04-0.12% S, 0.005-0.20% V, 0.005-0.018% Al, 0.05-0.30% Pb, and 0.001-0.006% Ca by weight, and as the remainder, Fe and inevitable impurities. It may additionally contain 0.50% or less of Cr.