| 发明名称 |
ROLLED STEEL THAT HARDENS BY MEANS OF PRECIPITATION AFTER HOT-FORMING AND/OR QUENCHING WITH A TOOL HAVING VERY HIGH STRENGTH AND DUCTILITY, AND METHOD FOR MANUFACTURING SAME |
| 摘要 |
A rolled steel sheet or blank is provided, the composition of which comprises the elements listed below in per cent by weight: C≦̸0.1%; 0.5%≦̸Mn≦̸7%; 0.5%≦̸Si≦̸3.5%; 0.5%<Ti≦̸2%; 2%<Ni≦̸7%; Al≦̸0.10%; Cr≦̸2%; Cu≦̸2%; Co≦̸2%; Mo≦̸2%; S≦̸0.005%; P≦̸0.03%; Nb≦̸0.1%; V≦̸0.1%; B<0.005%; N≦̸0.008%, and the silicon and titanium contents are such that: Si + Ti ≥ 2.5 % , Ti Si ≥ 0.3 the remainder of the composition consisting of iron and unavoidable impurities resulting from processing. A method for the fabrication of a part for a land motor vehicle from the sheet or blank by hot stamping is also provided. The microstructure of the part consisting essentially of martensite and intermetallic precipitates of type Fe2TiSi with an area percentage between 1 and 5% intermetallic precipitates. |
| 申请公布号 |
KR20140048350(A) |
申请公布日期 |
2014.04.23 |
| 申请号 |
KR20147009034 |
申请日期 |
2011.09.06 |
| 申请人 |
ARCELORMITTAL INVESTIGACION Y DESARROLLO SL |
发明人 |
BOUAZIZ OLIVIER;BARBIER DAVID;JUNG CORALIE |
| 分类号 |
C22C38/02;C21D6/02;C22C38/04;C22C38/08;C22C38/14;C23C2/06;C23C2/12 |
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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