发明申请
US20080121318A1 Method for producing seamless steel pipe 有权
无缝钢管生产方法

  • 专利标题: Method for producing seamless steel pipe
  • 专利标题(中): 无缝钢管生产方法
  • 申请号: US12010433
    申请日: 2008-01-24
  • 公开(公告)号: US20080121318A1
    公开(公告)日: 2008-05-29
  • 发明人: Yuji AraiKeiichi Nakamura
  • 申请人: Yuji AraiKeiichi Nakamura
  • 优先权: JP2005-214723 20050725
  • 主分类号: C21D9/08
  • IPC分类号: C21D9/08
Method for producing seamless steel pipe
摘要:
A seamless steel pipe produced by heating a steel billet, which has a chemical composition C: 0.15 to 0.20%, Si: not less than 0.01% to less than 0.15%, Mn: 0.05 to 1.0%, Cr: 0.05 to 1.5%, Mo: 0.05 to 1.0%, Al≦0.10%, V: 0.01 to 0.2%, Ti: 0.002 to 0.03%, B: 0.0003 to 0.005% and N: 0.002 to 0.01%, further optionally one or more of Ca, Mg and REM in a specific amount, under the provision that the conditions “C+(Mn/6)+(Cr/5)+(Mo/3)≧0.43” and “Ti×N
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