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发明公开
CN103556052A 汽车用高锰钢及其制造方法 失效 - 权利终止

汽车用高锰钢及其制造方法
摘要：
本发明公开了一种汽车用高锰钢，该钢的化学成分重量百分比如下：C：0.55～0.64%，Si：0～0.01%，Mn：23.5～24.4%，P：0～0.015%，Nb：0.45～0.54%，Als：0.02～0.06%，S：0～0.01%，N：0～0.003%，其余为Fe及不可避免的杂质。该钢的制造方法中，加热连铸坯的温度控制为1220～1280℃；粗轧的温度控制为1050～1100℃；精轧控制终轧温度为910～950℃；卷取在680～720℃进行；冷轧控制总压下率在67～80%；控冷控制连续退火温度为800～850℃。本发明通过优化钢的成分设计和控制生产工艺，得到了高强度的Fe-Mn-C-Nb系TWIP钢，其可用于冲制汽车安全件或结构件，所得产品具有良好得较高的屈服强度和塑性，在满足复杂零件成形要求的同时提高了零件在车辆实际使用过程中的安全性。
摘要（英）：

The invention discloses automotive high manganese steel. The steel comprises the following chemical components in percent by weight: 0.55-0.64 percent of C, 0-0.01 percent of Si, 23.5-24.4 percent of Mn, 0-0.015 percent of P, 0.45-0.54 percent of Nb, 0.02-0.06 percent of Als, 0-0.01 percent of S, 0-0.003 percent of N and the balance of Fe and inevitable impurities. The method for manufacturing the steel comprises the following steps of controlling temperature for heating a continuous casting billet to be 1220-1280 DEG C, controlling temperature of rough rolling to be 1050-1100 DEG C, controlling the finishing temperature to be 910-950 DEG C through finish rolling, rolling at the temperature of 680-720 DEG C, controlling a total reduction rate to be 67-80 percent through cold rolling, and controlling the continuous annealing temperature to be 800-850 DEG C through controlled cooling. The steel component design is optimized, and the production process is controlled, so that high-strength Fe-Mn-C-Nb TWIP steel is obtained and can be used for punching automotive safety parts or structural components. The obtained product has relatively high yield strength and plasticity, and the safety of parts in the actual vehicle using process is improved when the requirement for forming complex parts is met.

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