发明名称 |
METHOD FOR PRODUCING AN EASILY DEFORMABLE FLAT STEEL PRODUCT, FLAT STEEL PRODUCT, AND METHOD FOR PRODUCING A COMPONENT FROM SUCH A FLAT STEEL PRODUCT |
摘要 |
The invention relates to a method by means of which an easily deformable flat steel product having a carbon content of 0.1-0.4 wt % can be produced in a cost-effective manner. To this end, according to the invention, an annealing treatment is carried out under an annealing atmosphere comprising 0.1-25 vol % of H2, H2O, with the remainder being N2 and technically unavoidable impurities, and having a dew point of between -20°C and +60°C, wherein the ratio of H2O/H2 of the annealing atmosphere is no greater than 0.957. The flat steel product is thereby heated to a holding temperature of 600-1100°C in the course of the annealing treatment, at which it is held for a holding time of 10-360 s, so that the flat steel product obtained after the annealing treatment comprises a 10-200 µm thick ductile edge layer (R) adjacent to the free surface thereof, having a ductility that is greater than the interior core layer (K) of the flat steel product covered by the edge layer. The invention further relates to a correspondingly produced flat steel product particularly suitable for hot or cold forming, and to a method for producing components made of such a flat steel product. |
申请公布号 |
WO2011069906(A3) |
申请公布日期 |
2011.08.18 |
申请号 |
WO2010EP68831 |
申请日期 |
2010.12.03 |
申请人 |
THYSSENKRUPP STEEL EUROPE AG;WARNECKE, WILHELM;MEURER, MANFRED;KONDRATIUK, JENS;BLUMENAU, MARC;NORDEN, MARTIN;WUTTKE, THIEMO |
发明人 |
WARNECKE, WILHELM;MEURER, MANFRED;KONDRATIUK, JENS;BLUMENAU, MARC;NORDEN, MARTIN;WUTTKE, THIEMO |
分类号 |
C21D1/76;C21D3/04;C21D7/02;C21D7/13;C21D8/02;C22C38/02;C22C38/04;C22C38/32 |
主分类号 |
C21D1/76 |
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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