发明申请
- 专利标题: ROLLING BEARING
- 专利标题(中): 滚动轴承
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申请号: US14978528申请日: 2015-12-22
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公开(公告)号: US20160108491A1公开(公告)日: 2016-04-21
- 发明人: Hideyuki HIDAKA , Daisuke WATANUKI , Kazuki TAMURA
- 申请人: NSK LTD.
- 申请人地址: JP Tokyo
- 专利权人: NSK LTD.
- 当前专利权人: NSK LTD.
- 当前专利权人地址: JP Tokyo
- 优先权: JP2012-238231 20121029; JP2012-241822 20121101; JP2012-241823 20121101; JP2013-151873 20130722; JP2013-152358 20130723
- 主分类号: C21D9/40
- IPC分类号: C21D9/40 ; F16C33/64 ; C22C38/02 ; C21D1/42 ; C22C38/44 ; C22C38/04 ; F16C33/62 ; C21D6/00
摘要:
A rolling bearing in which at least one of the bearing rings is obtained by applying a induction heat treatment to a spheroidizing annealed steel material having a DI value of 1.0 or more to form a hardened layer having a hardness of 550 HV or more on at least a raceway surface and a fitting surface. In the induction heat-treated bearing ring, (A) an average retained austenite amount is 12 vol % or less, (B) the raceway surface has a retained austenite amount of 12 vol % or more and a residual compressive stress of −100 MPa or less, and (C) a difference between a hardness of the raceway surface and a minimum hardness of a region having a hardness of less than 550 HV is 150 HV or more.
公开/授权文献
- US09394583B2 Rolling bearing 公开/授权日:2016-07-19
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