发明名称 |
METHOD OF HOT FORMING A STEEL BLANK AND THE HOT FORMED PART |
摘要 |
A method of hot forming a steel blank into an article the method including the following steps: d) cooling a heated steel blank to form an article during hot forming, starting at a starting temperature T2 above Ar3; to an interrupt temperature T3 in the range of 400-550° C. at a cooling rate V2 of at least 25° C./s; e) immediately further cooling the article from the interrupt temperature T3 to ambient temperature at a cooling rate V3 of 0.2-10° C./s, wherein the interrupt temperature T3 and cooling rate V3 are selected such that the article thus obtained has multiphase microstructure including by volume fraction: 55-90% of bainitic ferrite 5-15% of retained austenite 5-30% martensite.
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申请公布号 |
EP2627790(A1) |
申请公布日期 |
2013.08.21 |
申请号 |
EP20110772882 |
申请日期 |
2011.10.10 |
申请人 |
TATA STEEL IJMUIDEN BV |
发明人 |
CHEN, SHANGPING;LAHAYE, CHRISTIAAN, THEODORUS, WILHELMUS |
分类号 |
C21D8/00;C21D1/673;C21D8/02;C21D9/46;C21D9/48;C22C38/02;C22C38/04;C22C38/12;C22C38/14;C22C38/22;C22C38/28;C22C38/38 |
主分类号 |
C21D8/00 |
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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