发明名称 |
COLD-ROLLED STEEL PLATE COATED WITH ZINC OR A ZINC ALLOY, METHOD FOR MANUFACTURING SAME, AND USE OF SUCH A STEEL PLATE |
摘要 |
<p>The present invention provides a“TRIP effect”cold-rolled and annealed steel sheet which has improved formability and weldability, strength between 780 and 900 MPa and elongation at fracture greater than 19%, the composition of which includes the following elements in percentages expressed by weight: 0.17%≰C≰0.25%, 1.5%≰Mn≰2%, 0.50%≰Si≰1%, 0.50%≰Al≰1.2%, whereby Si+Al≧1.30%, the remainder of the composition including iron and the inevitable impurities resulting from processing. The microstructure of the sheet includes 65 to 85% ferrite and 15 to 35% islands of martensite and residual austenite. The average size of these islands of martensite and residual austenite is less than 1.3 micrometers and their shape factor is less than 3.</p> |
申请公布号 |
KR20140026601(A) |
申请公布日期 |
2014.03.05 |
申请号 |
KR20147000196 |
申请日期 |
2012.05.17 |
申请人 |
ARCELORMITTAL INVESTIGACION Y DESARROLLO SL |
发明人 |
MBACKE PAPA AMADOU MACTAR;MOULIN ANTOINE |
分类号 |
C22C38/02;C21D1/20;C21D8/02;C21D9/46;C22C38/04;C22C38/06;C22C38/12 |
主分类号 |
C22C38/02 |
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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