发明授权
- 专利标题： High strength welded steel tube superior in hydrogen embrittlement cracking resistance of weld metal and method of production of same
- 专利标题（中）： 焊接金属耐氢脆性优异的高强度焊接钢管及其生产方法
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申请号： US11884860申请日： 2006-02-22
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公开(公告)号： US08653400B2公开(公告)日： 2014-02-18
- 发明人: Eiji Tsuru , Takuya Hara , Hitoshi Asahi , Hiroshi Morimoto , Yoshio Terada , Tatsuya Yoshida , Kouichi Shinada
- 申请人： Eiji Tsuru , Takuya Hara , Hitoshi Asahi , Hiroshi Morimoto , Yoshio Terada , Tatsuya Yoshida , Kouichi Shinada
- 申请人地址： JP Tokyo
- 专利权人： Nippon Steel & Sumitomo Metal Corporation
- 当前专利权人： Nippon Steel & Sumitomo Metal Corporation
- 当前专利权人地址： JP Tokyo
- 代理机构： Kenyon & Kenyon LLP
- 优先权： JP2005-050911 20050225; JP2006-025897 20060202
- 国际申请： PCT/JP2006/303820 WO 20060222
- 国际公布： WO2006/090889 WO 20060831
- 主分类号： B23K31/02
- IPC分类号： B23K31/02 ; B23K33/00 ; B21C37/08
摘要：
The present invention provides a high strength welded steel pipe superior in weld zone embrittlement crack characteristics and a method of production of the same, that is, a method of production of a welded steel pipe superior in hydrogen embrittlement cracking resistance of weld metal characterized by seam welding from the inner and outer surfaces by a tensile strength of 850 MPa or more, then expanding or reducing the size of the pipe for correction, which method of production of welded steel pipe characterized in that the hydrogen concentration of the preceding weld metal is 0.2 cc or less per 100 g at ordinary temperature.
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