郭浩冉,高古辉,桂晓露,白秉哲

• 1:北京交通大学机械与电子控制工程学院

摘要(Abstract)：

采用SEM、TEM、EBSD、XRD等手段,研究了Q-P-T工艺配分温度(320、380和450℃)对28Mn2SiCrNiMo钢组织及性能的影响规律。结果表明:试验钢在320℃配分后,获得针状下贝氏体+马氏体+残留奥氏体组织;380℃配分后,获得板条状上贝氏体+马氏体+残留奥氏体组织;450℃配分后,组织为马氏体+残留奥氏体,无贝氏体生成。当配分温度为320℃时,强度、塑性和韧性的配合达到最佳,强度为1524MPa,总伸长率为18.7%,V型缺口冲击功为58J。配分过程中贝氏体的形成,分割原奥氏体晶粒,细化组织,阻碍了裂纹的扩展,使得试验钢的冲击韧性大幅提升。

关键词(KeyWords)： 淬火-配分-回火工艺;贝氏体;显微组织;力学性能;残留奥氏体

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51301012)

作者(Author): 郭浩冉,高古辉,桂晓露,白秉哲

DOI: 10.13289/j.issn.1009-6264.2017-0145

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