发明名称 |
High-Strength Flat Steel Product and Method for Producing Same |
摘要 |
A flat steel product having a tensile strength of at least 1200 MPa and consists of steel containing (wt %) C: 0.10-0.50%, Si: 0.1-2.5%, Mn: 1.0-3.5%, Al: up to 2.5%, P: up to 0.020%, S: up to 0.003%, N: up to 0.02%, and optionally one or more of the elements “Cr, Mo, V, Ti, Nb, B and Ca” in the quantities: Cr: 0.1-0.5%, Mo: 0.1-0.3%, V: 0.01-0.1%, Ti: 0.001-0.15%, Nb: 0.02-0.05%, wherein Σ(V, Ti, Nb)≦0.2% for the sum of the quantities of V, Ti and Nb, B: 0.0005-0.005%, and Ca: up to 0.01% in addition to Fe and unavoidable impurities. The flat steel product has a microstructure with (in surface percent) less than 5% ferrite, less than 10% bainite, 5-70% untempered martensite, 5-30% residual austenite, and 25-80% tempered martensite, at least 99% of the iron carbide contained in the tempered martensite having a size of less than 500 nm. |
申请公布号 |
US2014322559(A1) |
申请公布日期 |
2014.10.30 |
申请号 |
US201214117711 |
申请日期 |
2012.05.16 |
申请人 |
Becker Jens-Ulrik;Bian Jian;Heller Thomas;Schoenenberg Rudolf;Thiessen Richard G.;Zeizinger Sabine;Rieger Thomas;Bulters Oliver |
发明人 |
Becker Jens-Ulrik;Bian Jian;Heller Thomas;Schoenenberg Rudolf;Thiessen Richard G.;Zeizinger Sabine;Rieger Thomas;Bulters Oliver |
分类号 |
C23C2/02;C21D1/18;C22C38/38;C22C38/34;C22C38/32;C22C38/00;C22C38/14;C22C38/12;C22C38/06;C22C38/04;C22C38/02;C21D6/00;C22C38/28 |
主分类号 |
C23C2/02 |
代理机构 |
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代理人 |
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主权项 |
1. A flat steel product which has a tensile strength Rm of at least 1200 MPa and which consists of a steel that contains (in wt %)
C: 0.10-0.50%, Si: 0.1-2.5%, Mn: 1.0-3.5% Al: up to 2.5%, P: up to 0.020%, S: up to 0.003%, N: up to 0.02%, and optionally one or more of the elements “Cr, Mo, V, Ti, Nb, B and Ca” in the following quantities: Cr: 0.1-0.5%, Mo: 0.1-0.3%, V: 0.01-0.1%, Ti: 0.001-0.15%, Nb: 0.02-0.05%, wherein Σ(V, Ti, Nb)≦0.2% for the sum Σ(V, Ti, Nb) of the quantities of V, Ti and Nb, B: 0.0005-0.005%, and Ca: up to 0.01% in addition to Fe and unavoidable impurities, and a microstructure with (in surface percent) less than 5% ferrite, less than 10% bainite, 5-70% untempered martensite, 5-30% residual austenite and 25-80% tempered martensite, at least 99% of the iron carbide contained in the untempered martensite having a size of less than 500 nm. |
地址 |
Duisburg DE |