关键词: IF钢, 冷轧, 压下率, 深冲性能, 道次压下量

Abstract: A 2-pass cold rolling process was conducted in lab with lubricant used for hot rolled IF strips, with the purpose of improving the drawability of IF steel after cold rolling. The results show that the partition of the fixed overall reduction is of key importance to the drawability of the IF sheet. If the overall reduction remains unchanged, the measured plastic strain ratio, r, after 2-pass rolling is higher than that after single pass rolling. The r increases if the first pass reduction is smaller than the second one, and the r also increases if the overall reduction increases properly. The r can be up to over 3. 2 if both the reduction ratios are 75%. The ODF texture analysis made to the rolled specimen shows its identity with the r measured, and the micrographic results show that the equiaxed grain benefits the drawability.