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CN102041439A 一种改善汽车用低碳铝镇静钢连退产品力学性能的方法 无效 - 撤回

一种改善汽车用低碳铝镇静钢连退产品力学性能的方法
摘要：
一种改善汽车用低碳铝镇静钢连退产品力学性能的方法，属于金属材料加工领域。钢板的化学成分质量百分比为：C，0.015-0.04％；Si，≤0.03％；Mn，0.2-0.35％；P，≤0.010％；S，≤0.010％；Alt，0.02-0.05％，N，≤00.0040，B，0.0005-0.0030％，余量为Fe。热轧工艺参数：卷取温度，710±20℃。优点在于，通过在传统低碳铝镇静钢的成分基础上添加一定量的B微合金元素，并采取合适的热轧工艺，使得连退成品的晶粒尺寸粗化，组织中的珠光体比例降低，最终降低了成品的屈服强度，提高了成品的延伸率，改善了综合力学性能；生产出能够满足汽车用户高成形性能要求的低碳铝镇静钢连退产品，可带来可观的经济效益。
摘要（英）：

The invention relates to a method for improving mechanical properties of a low-carbon aluminum killed steel continuous annealing product for an automobile, belonging to the field of metal material processing. The steel plate comprises the following chemical components in percentage by weight: 0.015-0.04% of C, no more than 0.03% of Si, 0.2-0.35% of Mn, no more than 0.010% of P, no more than 0.010% of S, 0.02-0.05% of Alt, no more than 00.0040% of N, 0.0005-0.0030% of B and balance of Fe. The hot rolling process parameter is as follows: the coiling temperature is 710+/-20 DEG C. By adding a certain number of B micro alloy elements to components of the traditional low-carbon aluminum killed steel and using the appropriate hot rolling process, the invention coarsens the grain size of the finished continuous annealing product and lowers the ratio of pearlites in tissues, thereby ultimately reducing the yield strength of the finished product, increasing the extensibility of the finished product and improving the comprehensive mechanical properties. The produced low-carbon aluminum killed steel continuous annealing product can meet the high-shaping property requirements of automobile users, thereby bringing considerable economic benefits.

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