钼对热轧双相钢相变规律和生产工艺的影响
Effect of Mo on Transformation Rule and Production Process of Hot-rolled Dual Phase Steel
牛见青, 江海涛, 唐 荻
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作者单位：(北京科技大学 高效轧制国家工程研究中心, 北京 100083)
中文关键字：热轧双相钢； 相变规律； 组织演变； 生产工艺
英文关键字：hot-rolled dual phase steel; transformation rule; microstructure evolution; production process
中文摘要：通过比较C-Si-Mn-Cr-Mo和C-Si-Mn-Cr两种实验钢的连续冷却转变曲线，分析了合金元素Mo对热轧双相钢连续冷却过程相变规律和组织演变的影响，探讨了Mo对热轧双相钢生产工艺的影响。结果表明，Mo元素降低贝氏体开始转变温度，促使奥氏体亚稳区的形成,还可以强烈阻碍铁素体的转变过程，略微减小铁素体晶粒尺寸，并且提高实验钢的显微硬度。这两种实验钢通过合适的生产工艺均可以用来生产热轧双相钢。
英文摘要：By comparing the continuous cooling transformation curves of C-Si-Mn-Cr-Mo steel with those of C-Si-Mn-Cr steel, the effects of Mo on transformation and microstructure evolution during continuous cooling of hot-rolled dual phase steel were analyzed. The effect of Mo on production process of hot-rolled dual phase steels was also discussed. The results show that Mo reduces bainite starting temperature, promotes the formation of metastable austenite region, consumingly restrains ferrite transformation, appreciably refines ferrite grain size and enhances microhardness of the testing steel. Both of the testing steels can be used for the production of hot-rolled dual phase steels by appropriate production process.