发明授权
- 专利标题: Electric-resistance-welded steel pipe with high strength
- 专利标题(中): 高强度电阻焊钢管
-
申请号: US813361申请日: 1991-12-24
-
公开(公告)号: US5286309A公开(公告)日: 1994-02-15
- 发明人: Tatsuo Maeda , Toshihiro Takamura , Yoshiichi Ishizawa , Yuji Sugimoto , Mitoshi Morimoto , Tetsuro Sugayoshi , Fumihiro Nishimura
- 申请人: Tatsuo Maeda , Toshihiro Takamura , Yoshiichi Ishizawa , Yuji Sugimoto , Mitoshi Morimoto , Tetsuro Sugayoshi , Fumihiro Nishimura
- 申请人地址: JPX Tokyo
- 专利权人: NKK Corporation
- 当前专利权人: NKK Corporation
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX2-413017 19901225
- 主分类号: B23K13/00
- IPC分类号: B23K13/00 ; C21D6/00 ; C21D8/02 ; C21D8/10 ; C21D9/08 ; C22C38/00 ; C22C38/04 ; C22C38/14 ; C22C38/32 ; F16L9/02 ; C22C38/02 ; C22C38/12
摘要:
An electric-resistance-welded steel pipe with high strength. The pipe consists essentially of (a) 0.05 to 0.30 wt. % C, (b) 0.6 to 2.0 wt. % Mn, (c) 0.03 to 0.70 wt. % Si, (d) (i) 0.5 wt. % or less Mo by itself or (ii) 0.5 wt. % or less Mo with 1.2 wt. % or less Cr or (iii) 0.5 wt. % or less Mo with 0.1 wt. % or less V or (iv) 0.1 wt. % or less V and (e) the balance being Fe and inevitable impurities. The steel pipe has a martensitic phase in an amount of 60 to 100% and has a tensile strength of 120 to 170 kgf/mm.sup.2. The steel pipe is useful as an impact bar for the inside of an automobile door.