发明申请
US20070217942A1 Steel Product for Use as Line Pipe Having High Hic Resistance and Line Pipe Produced Using Such Steel Product
有权
钢制产品用作具有高耐热性的管线和使用这种钢产品生产的管线
- 专利标题： Steel Product for Use as Line Pipe Having High Hic Resistance and Line Pipe Produced Using Such Steel Product
- 专利标题（中）： 钢制产品用作具有高耐热性的管线和使用这种钢产品生产的管线
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申请号： US10588122申请日： 2004-06-17
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公开(公告)号： US20070217942A1公开(公告)日： 2007-09-20
- 发明人: Takahiro Kushida , Kazuyo Kushida , Tomohiko Omura , Mitsuhiro Numata
- 申请人： Takahiro Kushida , Kazuyo Kushida , Tomohiko Omura , Mitsuhiro Numata
- 申请人地址： JP Osaka 541-0041
- 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 541-0041
- 优先权： JP2004-028635 20040204
- 国际申请： PCT/JP04/08542 WO 20040617
- 主分类号： C22C38/00
- IPC分类号： C22C38/00
摘要：
A steel product for a line pipe according to the invention has a composition containing, in mass %, C : 0.03% to 0.15%, Si: 0.05% to 1.0%, Mn: 0.5% to 1.8%, P: 0.015% or less, S: 0.004% or less, O: 0.01% or less, N: 0.007% or less, sol. Al: 0.01% to 0.1%, Ti: 0.024% or less, Ca: 0.0003% to 0.02%, and the balance consisting of Fe and impurities. The size of TiN in the steel product for a line pipe is at most 30 μm. The steel product has high HIC resistance and its crack area ratio can be reduced to 3% or less.
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