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发明公开
CN104060163A 一种冷成型用热轧钢板及其制造方法 无效 - 驳回

一种冷成型用热轧钢板及其制造方法
摘要：
本发明公开了一种冷成型用热轧钢板及其制造方法，该冷成型用热轧钢板的制备方法包括炼钢步骤、连铸步骤、加热步骤、热连轧步骤和卷取步骤，其特征在于，所述炼钢后的钢水成分为：0.05-0.1重量%的C，≤0.1重量%的Si，1.6-1.8重量%的Mn，0.03-0.07重量%的Nb，0.08-0.1重量%的Ti，≤0.025重量%的P，≤0.01重量%的S，余量为Fe和不可避免的杂质；所述热连轧步骤中的精轧终轧温度为850-900℃；所述卷取步骤中的卷取温度为570-640℃。根据本发明的方法，能够提供一种屈服强度650MPa级冷成型用高强度热轧钢板。
摘要（英）：

The invention discloses a hot rolled sheet steel for cold forming and a making method thereof, the making method of the hot rolled sheet steel for cold forming includes the steps of steelmaking, continuous casting, heating, hot continuous rolling and coiling, and the steelmaking molten steel is characterized by comprising the following components: 0.05 to 0.1 wt% of C, less than or equal to 0.1 wt% of Si, 1.6 to 1.8 wt% of Mn, 0.03 to 0.07 wt% of Nb, 0.08 to 0.1 wt% of Ti, less than or equal to 0.025 wt% of P, less than or equal to 0.01 wt% of S, and the balance of Fe and unavoidable impurities; the precision rolling finish rolling temperature of the hot continuous rolling step is 850-900 DEG C; and the coiling temperature of the coiling step is 570 to 640 DEG C. According to the method, the high-strength hot rolled sheet steel for cold forming with yield strength of 650MPa is provided.

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