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发明公开
CN105132816A 一种1000MPa级冷轧退火双相钢及其生产方法和用途 无效 - 撤回

一种1000MPa级冷轧退火双相钢及其生产方法和用途
摘要：
本发明公开了一种1000MPa级冷轧退火双相钢及其生产方法和用途，其化学成分质量百分比如下：C：0.17～0.23%，Mn：1.6～2.2%，S≤0.010%，P≤0.020%，Si：0.3～0.6%，Nb：0.040～0.060%，Ti：0.040～0.060%，Als≥0.030%，Cr：0.40～0.60%，N≤50ppm，其余为Fe和不可避免的杂质。生产工艺包括热轧、冷轧、退火和平整工序；本发明生产的1000MPa级冷轧退火双相钢用于制备机械防撞件及加强件。本发明产品抗拉强度在1000MPa以上，断后伸长率在12%以上，具有良好的烘烤硬化性能。
摘要（英）：

The invention discloses 1,000 MPa cold-rolled and annealed dual-phase steel and a production method and application thereof. The 1,000 MPa cold-rolled and annealed dual-phase steel comprises the following chemical constituents in percentage by mass: 0.17-0.23 percent of C, 1.6-2.2 percent of Mn, 0.010 percent or less of S, 0.020 percent or less of P, 0.3-0.6 percent of Si, 0.040-0.060 percent of Nb, 0.040-0.060 percent of Ti, 0.030 percent or more of Als, 0.40-60 percent of Cr, 50 ppm or less of N and the balance of Fe and inevitable impurities. A production process comprises the procedures of hot rolling, cold rolling, annealing and flattening. The 1,000 MPa cold-rolled and annealed dual-phase steel produced according to the production method is used for preparing mechanical anti-collision pieces and reinforcing pieces. The product provided by the invention has the tensile strength above 1,000 MPa and the percentage elongation after fracture above 12%, and has a favorable bake-hardening property.

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