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发明公开
CN110358975A 一种热镀锌生产340MPa级高表面等级含P高强钢的方法 无效 - 驳回

一种热镀锌生产340MPa级高表面等级含P高强钢的方法
摘要：
本发明提供了热镀锌生产340MPa级高表面等级含P高强钢的方法，步骤包括：将钢坯热轧、卷曲、冷轧、退火、热镀锌、光整；以质量百分比计，所述钢坯化学成分为：C：0.002％～0.008％、Si：0.02％～0.04％、Mn：0.2％～0.25％、P：0.06％～0.08％、S≤0.005％、Alt：0.025～0.035％，其余为铁和不可避免的杂质元素；配合热轧、酸轧、热镀锌、光整等工艺使得带钢具有较高的强度和良好的成形性，具有良好的表面质量，强度级别可以达到340MPa以上。
摘要（英）：

The invention provides a method for producing 340-MPa grade high-surface grade P-containing high-strength steel by hot galvanizing. The method comprises the steps of carrying out hot rolling, curling,cold rolling, annealing, hot galvanizing and finishing on a steel billet, wherein the steel billet comprises the chemical components in percentage by mass: 0.002%-0.008% of C, 0.02%-0.04% of Si, 0.2%-0.25% of Mn, 0.06%-0.08% of P, less than or equal to 0.005% of S, 0.025-0.035% of Alt, and the balance Fe and inevitable impurity elements. According to the method, by matching with hot rolling, acidrolling, hot galvanizing, finishing and other processes, the strip steel has high strength and good formability, and has good surface quality with the strength grade reaching more than 340 MPa.

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