发明名称 |
STRAIN AGING HARDENING TYPE STEEL SHEET EXCELLENT IN AGING RESISTANCE, AND MANUFACTURING METHOD THEREOF |
摘要 |
A strain aging hardening type steel sheet excellent in aging resistance, and manufacturing method thereof, said steel sheet comprises: in mass %, C: 0.0010 to 0.010%; Si: 0.005 to 1.0%; Mn: 0.08 to 1.0%; P: 0.003 to 0.10%; S: 0.0005 to 0.020%; Al: 0.010 to 0.10%; Cr: 0.005 to 0.20%; Mo: 0.005 to 0.20%; Ti: 0.002 to 0.10%; Nb: 0.002 to 0.10%; N: 0.001 to 0.005%; and a balance being composed of Fe and inevitable impurities, in which a ferrite fraction is 98% or more, an average grain diameter of ferrite is 5 to 30 mum, a minimum value of dislocation density in a portion having a ½ thickness of a sheet thickness and a minimum value of dislocation density in a surface layer portion are each 5×1012/m2 or more, and an average dislocation density falls within a range of 5×1012 to 1×1015/m2.
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申请公布号 |
US2013248060(A1) |
申请公布日期 |
2013.09.26 |
申请号 |
US201113988513 |
申请日期 |
2011.06.22 |
申请人 |
MARUYAMA NAOKI;HASHIMOTO KOJI;KAMEDA MASAHARU;NIPPON STEEL & SUMITOMO METAL CORPORATION |
发明人 |
MARUYAMA NAOKI;HASHIMOTO KOJI;KAMEDA MASAHARU |
分类号 |
C22C38/50;C21D8/02;C22C38/00;C22C38/02;C22C38/04;C22C38/20;C22C38/22;C22C38/24;C22C38/26;C22C38/28;C22C38/32;C22C38/44;C22C38/48 |
主分类号 |
C22C38/50 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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