发明授权
- 专利标题: Steel tube for bearing element parts and method of manufacturing as well as machining the same
- 专利标题(中): 用于轴承元件零件的钢管和制造方法以及机加工
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申请号: US11191914申请日: 2005-07-29
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公开(公告)号: US07393420B2公开(公告)日: 2008-07-01
- 发明人: Yoshihiro Daito , Takashi Nakashima
- 申请人: Yoshihiro Daito , Takashi Nakashima
- 申请人地址: JP Osaka
- 专利权人: Sumitomo Metal Industries, Ltd.
- 当前专利权人: Sumitomo Metal Industries, Ltd.
- 当前专利权人地址: JP Osaka
- 代理机构: Clark & Brody
- 优先权: JP2003-022111 20030130
- 主分类号: C22C38/18
- IPC分类号: C22C38/18 ; C21D8/10
摘要:
Steel tubes for bearing element parts according to the present invention, wherein the specific compositions are limited and an accumulation intensity of {211} face along with an impact property at ambient temperature in the longitudinal direction of steel tube are specified, can be provided as a source material for bearing element parts, which have excellent machinability and fatigue life in rolling contact, being incorporated without adding a free-cutting element specifically nor without reducing productivity since the spheroidizing for the same annealing duration with that of conventional spheroidizing treatment can be applied. Accordingly, by applying a manufacturing method or a cutting-machining method according to the present invention, bearing element parts such as races, rollers and shafts can be produced with less cost and efficiently.
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