发明公开
EP0295697A2 Cold rolled steel sheets having improved spot weldability and method for producing the same
失效
Kaltgewalzte Stahlbleche mit verbesserterPunktschweissfähigkeitund Verfahren zu ihrer Herstellung。
- 专利标题： Cold rolled steel sheets having improved spot weldability and method for producing the same
- 专利标题（中）： Kaltgewalzte Stahlbleche mit verbesserterPunktschweissfähigkeitund Verfahren zu ihrer Herstellung。
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申请号： EP88109682.0申请日： 1988-06-16
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公开(公告)号： EP0295697A2公开(公告)日： 1988-12-21
- 发明人: Okada, Susumu , Imananka, Makoto , Masui, Sasumu , Obara, Takashi , Shinozaki, Masatoshi , Tsunoyama, Kozo
- 申请人： KAWASAKI STEEL CORPORATION
- 申请人地址： 1-28, Kitahonmachi-dori 1-chome Chuo-ku Kobe City JP
- 专利权人： KAWASAKI STEEL CORPORATION
- 当前专利权人： KAWASAKI STEEL CORPORATION
- 当前专利权人地址： 1-28, Kitahonmachi-dori 1-chome Chuo-ku Kobe City JP
- 代理机构： Grünecker, Kinkeldey, Stockmair & Schwanhäusser Anwaltssozietät
- 优先权： JP150313/87 19870618; JP152977/87 19870619; JP152978/87 19870619; JP152979/87 19870619
- 主分类号： C22C38/12
- IPC分类号： C22C38/12 ; C22C38/14
摘要：
An extra-low carbon cold rolled steel sheet useful for use in automobiles and the like having an improved spot weldability is obtained by combinedly adding Ti, Nb and B in predetermined amounts to the extra-low carbon steel so as to control the amount of fine Ti precipitate dispersed in steel to the specified reasonable range. Furthermore, the spot weldability is improved by controlling the production conditions of the extra-low carbon steel sheet to specified reasonable ranges.
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