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发明公开
CN103789621A 一种高强度紧固件用贝氏体结构钢的制备工艺 无效 - 撤回

一种高强度紧固件用贝氏体结构钢的制备工艺
摘要：
本发明公开了一种高强度紧固件用贝氏体结构钢的制备工艺，该贝氏体结构钢的化学成分以重量百分数计由下列组份组成：C：0.04％～0.08％、Mn：1.20％～1.80％、Si：0.60％～0.80％、S：≤0.010％、P：≤0.010％、Nb：0.06％～0.08％、V：0.15％～0.25％、Ti：0.04％～0.06％、N：0.005％～0.010％、B：0.005％～0.007％、Als：≤0.035％，余量为Fe及不可避免的杂质；所述制备工艺包括如下步骤：1）冶炼精炼并连铸成坯；2）再次加热；3）控轧控冷。
摘要（英）：

The invention discloses a preparation process of bainite structure steel for a high-strength fastener. The bainite structure steel consists of the following chemical components in percentage by weight: 0.04-0.08 percent of C, 1.20-1.80 percent of Mn, 0.60-0.80 percent of Si, less than or equal to 0.010 percent of S, less than or equal to 0.010 percent of P, 0.06-0.08 percent of Nb, 0.15-0.25 percent of V, 0.04-0.06 percent of Ti, 0.005-0.010 percent of N, 0.005-0.007 percent of B, less than or equal to 0.035 percent of Als, and the balance of Fe and inevitable impurities. The preparation process comprises the following steps: (1) performing smelting, refining and continuous casting into a blank; (2) performing reheating; (3) performing controlled rolling and controlled cooling.

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