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发明公开
CN106222546A 一种屈服强度340MPa级热镀锌烘烤硬化钢制备方法 无效 - 驳回

一种屈服强度340MPa级热镀锌烘烤硬化钢制备方法
摘要：
本发明属于炼钢技术领域，公开了一种屈服强度340MPa级热镀锌烘烤硬化钢制备方法，其特征在于：化学成分质量百分比分别为，碳含量0.0065％～0.0085％；锰含量0.3％～0.5％；硅含量≤0.03％；磷含量≤0.02％；硫含量≤0.012％；铌含量0.010％～0.018％；铝含量0.02％～0.08％；氮含量0.0025％～0.0075％；余量为Fe。本发明通过创新的成分控制，添加合金元素优化结构，得到保持较高屈服强度同时具有良好成形性能的汽车内外板冲压用钢。
摘要（英）：

The invention belongs to the technical field of steelmaking, and discloses a preparation method for hot-galvanized baking-hardened steel with the yield strength being at 340 MPa grade. The hot-galvanized baking-hardened steel with the yield strength being at 340 MPa grade is characterized by comprising chemical components including, by mass, 0.0065%-0.0085% of carbon, 0.3%--0.5% of manganese, 0%-0.03% of silicon, 0%-0.02% of phosphorus, 0%-0.012% of sulfur, 0.010%-0.018% of niobium, 0.02%-0.08% of aluminum, 0.0025%-0.0075% of nitrogen and the balance ferrum. According to the preparation method for the hot-galvanized baking-hardened steel with the yield strength being at the 340 MPa grade, the steel which is high in yield strength and good in forming property and is used for stamping of automotive inner plates and outer plates is obtained by adopting innovative component control and adding alloying elements to optimize the structure.

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