孙国栋,贾贺泽,张文学,周丽,殷凤仕

• 1:山东理工大学机械工程学院
• 2:山东理工大学化学工程学院

摘要(Abstract)：

针对锥形磨浆机磨片的工作条件和失效分析,设计制备了一种低碳马氏体不锈钢Fe-0.04C-15Cr-3Ni-0.5Mo-0.1Nb。采用光学显微镜、扫描电子显微镜以及硬度、冲击和摩损试验等方法研究了热处理工艺对试验钢显微组织和性能的影响。结果表明,试验钢在940~1100℃之间加热保温1 h后空冷淬火,显微组织为板条马氏体和均匀分布的细小颗粒状含Nb的MC型碳化物,随加热温度的升高原始奥氏体晶粒逐渐长大,MC型碳化物颗粒减少,硬度在1020℃达到最大值45.2 HRC;经1020℃淬火550~750℃之间回火后,随回火温度的升高,在原奥氏体晶界和板条界析出M23C6型碳化物,硬度先减小后增大,韧性先增大后减小,700℃回火时,冲击吸收功达到最大值102.8 J,硬度达到最小值33 HRC,750℃回火时,由于开始形成奥氏体和M23C6型碳化物的溶解,回火后的空冷过程中奥氏体又形成马氏体,使硬度升高,冲击吸收功降低,在550~700℃之间回火,试验钢的耐磨性随回火温度的升高而降低。

关键词(KeyWords)： 低碳马氏体不锈钢;淬火+回火;显微组织;性能

Abstract:

Keywords:

基金项目(Foundation): 山东省自然科学基金(ZR2013EMM005)

作者(Author): 孙国栋,贾贺泽,张文学,周丽,殷凤仕

DOI: 10.13289/j.issn.1009-6264.2015.06.027

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