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低碳马氏体钢的细晶强化机理及其力学性能

DOI: 10.3969/j.issn.1005-3026.2014.04.010, PP. 499-503

Keywords: 低碳马氏体钢,淬火热处理工艺,奥氏体,显微组织,力学性能

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Abstract:

对不同热处理条件下获得的低碳马氏体钢的微观组织及力学性能进行了系统的研究.实验结果表明,盐浴淬火热处理可以实现样品的快速、均匀加热,与常规的热处理条件相比,由于加热速度快、保温时间短,在材料完全奥氏体化初期或接近完全奥氏体化情况下,奥氏体晶粒还未长大,通过淬火得到较为细小的马氏体组织,可以获得力学性能优良的马氏体钢.通过优化的热处理参数可以将材料的抗拉强度和延伸率均提高10%以上.其中盐浴淬火在930℃×20s工艺下,抗拉强度达到1488GPa,延伸率为76%.

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