发明授权
- 专利标题: High strength steel pipe for an air bag and a process for its manufacture
- 专利标题(中): 用于气囊的高强度钢管及其制造方法
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申请号: US10304698申请日: 2002-11-27
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公开(公告)号: US06878219B2公开(公告)日: 2005-04-12
- 发明人: Kunio Kondo , Miyuki Yamamoto , Takashi Takano , Kenichi Beppu , Susumu Hirano , Keisuke Hitoshio , Hidetoshi Kurata
- 申请人: Kunio Kondo , Miyuki Yamamoto , Takashi Takano , Kenichi Beppu , Susumu Hirano , Keisuke Hitoshio , Hidetoshi Kurata
- 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: JP2001-095484 20010329; JP2001-371409 20011205
- 主分类号: B60R21/268
- IPC分类号: B60R21/268 ; C21D1/18 ; C21D8/10 ; C21D9/08 ; C22C38/20 ; C22C38/22 ; C22C38/26 ; C22C38/28 ; C22C38/40 ; C22C38/42 ; C22C38/48 ; C22C38/50 ; C22C38/58 ; C22C38/18
摘要:
In order to manufacture a steel pipe for an air bag which can cope with increase in the pressure of gas blown into an air bag and decreases in the wall thickness of an accumulator, a steel having a composition, mass %, of: C: 0.05-0.20%,Si: 0.1-1.0%,Mn: 0.20-2.0%, P: at most 0.025%,S: at most 0.010%,Cr: 0.05-1.0%, Al: at most 0.10%, if necessary at least one of Mo: at most 0.50%, Ni: at most 1.5%, Cu: at most 0.5%, V: at most 0.2%, Ti: at most 0.1%, Nb: at most 0.1%, and B: at most 0.005%, andalso if necessary, at least one of Ca: at most 0.01%, Mg: at most 0.01%, and REM (rare earth elements): at most 0.01%,and a remainder of Fe and impurities is used to produce a steel pipe, and the pipe is then subjected to cold working to predetermined dimensions, then to heating to a temperature of at least the Ac1 transformation temperature followed by quenching, and then to tempering at a temperature no higher than the Ac1 transformation temperature.