钟磊,吴开明,董航宇,周雯,顾丽媛

• 1:武汉科技大学国际钢铁研究院

摘要(Abstract)：

设计了一步和两步贝氏体等温转变工艺及贝氏体等温转变+深冷处理工艺,通过电子背散射衍射(EBSD)、扫描电镜(SEM)、X射线衍射分析(XRD)和拉伸实验等方法,对比分析了不同热处理工艺对低温贝氏体钢微观组织与力学性能的影响。结果表明:与一步贝氏体转变相比,两步贝氏体转变和深冷处理工艺均可有效细化块状残留奥氏体,降低残留奥氏体体积分数,减小平均有效晶粒尺寸;深冷处理工艺可以进一步提高试验钢的硬度,冲击韧性相应有所下降;两步贝氏体工艺的贝氏体铁素体板条平均尺寸更小,具有更多的薄膜状残留奥氏体,获得了最佳的综合力学性能。

关键词(KeyWords)： 低温贝氏体钢;两步贝氏体转变;深冷处理;残留奥氏体;力学性能

Abstract:

Keywords:

基金项目(Foundation): 湖北省自然科学基金创新群体(2016CFA004)

作者(Author): 钟磊,吴开明,董航宇,周雯,顾丽媛

DOI: 10.13289/j.issn.1009-6264.2018-0211

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