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发明公开
CN102839329A 一种抗拉强度450MPa级冷轧双相钢钢板及其制备方法 有权

一种抗拉强度450MPa级冷轧双相钢钢板及其制备方法
摘要：
本发明公开了一种抗拉强度450MPa级汽车用冷轧双相钢钢板及其制备方法，所述的双相钢的化学成分质量百分数为：C：0.03-0.06%、Si：0.2-0.3%、Mn：1.4-1.6% 、Cr：0.1~0.3%、Ti：0.003~0.020%， Als：0.020-0.060%、P≤0.01%、S≤0.01%，余量为Fe和不可避免的杂质。本发明与现有技术相比，所生产的汽车用高强度冷轧双相钢板，屈服强度为200MPa~250MPa，抗拉强度为440MPa~500MPa， 延伸率为26％～32％。
摘要（英）：

The invention discloses a cold-rolling double-phase-steel steel plate with a tensile strength of 450 MPa, and a preparation method thereof. The mass percentages of chemical components of the double-phase-steel are as follows: 0.03-0.06% of C, 0.2-0.3% of Si, 1.4-1.6% of Mn, 0.1-0.3% of Cr, 0.003-0.020% of Ti, 0.020-0.060% of Al, P <= 0.01%, S <= 0.010%, and the balance being Fe and inevitable impurities. Compared with a conventional method, the high-strength cold-rolling double-phase-steel steel plate used for automobiles has a yield strength of 200 MPa-250 MPa, the a tensile strength of 450 MPa-500 MPa and an elongation of 26%-32%.

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