公开(公告)号：US20090277546A1

公开(公告)日：2009-11-12

申请号：US12447626

申请日：2007-10-24

Applicant: Brigitte Hammer ,  Thomas Heller ,  Johann Wilhelm Schmitz ,  Jochen Wans ,  Andreas Nuss

Inventor： Brigitte Hammer ,  Thomas Heller ,  Johann Wilhelm Schmitz ,  Jochen Wans ,  Andreas Nuss

IPC: C21D8/02 ,  B21B1/46

CPC classification number: C21D8/0415 ,  B22D11/001 ,  B22D11/06 ,  C21D8/0426 ,  C21D8/0473 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/28

Abstract: A method, which allows high-tensile flat steel products to be manufactured with less effort, includes a steel that forms a complex phase microstructure and contains (in wt. %) C: 0.08-0.11%, Mn: 1.00-1.30%, P: ≦0.030%, S: ≦0.004%, Si: 0.60-0.80%, Al: ≦0.05%, N: ≦0.0060%, Cr: 0.30-0.80%, Ti: 0.060-0.120%, remainder iron and unavoidable impurities, being cast into a cast strip having a thickness of 1-4 mm. The cast strip is hot-rolled in-line into a hot-rolled strip having a thickness of 0.5-3.2 mm in a continuous process at a final hot-rolling temperature ranging from 900 to 1100° C., the deformation degree being greater than 20%. The hot-rolled strip is coiled at a coiling temperature ranging from 550 to 620° C., so as to obtain a hot-rolled strip, which has a minimum tensile strength Rm of 800 MPa at a minimum breaking elongation A80 of 10%.

Abstract translation: 允许以较小的努力制造高强度扁钢产品的方法包括形成复相相组织的钢，其含有（重量％）C：0.08-0.11％，Mn：1.00-1.30％，P ：<= 0.030％，S：<= 0.004％，Si：0.60-0.80％，Al：≤0.05％，N：<= 0.0060％，Cr：0.30-0.80％，Ti：0.060-0.120％ 和不可避免的杂质，铸造成厚度为1-4mm的铸造带材。 在900〜1100℃的最终热轧温度下，将铸造带连续热轧成直径为0.5-3.2mm的热轧带材，变形度大于 20％。 将该热轧带卷绕在550〜620℃的卷取温度下，得到最小拉伸强度Rm为800MPa，最小断裂伸长率A80为10％的热轧带材。