梁晓东,吕加伟,闫浩,赵子君,王馨缘,孟佳明,王旭

• 1:辽宁石油化工大学机械工程学院

摘要(Abstract)：

采用光学显微镜(OM)、扫描电镜(SEM)、透射电镜(TEM)、X射线衍射(XRD)、硬度计和拉伸试验机等研究了不同回火温度对C61齿轮钢显微组织和力学性能的影响。结果表明:回火温度为360～600℃时,随着回火温度的升高,C61齿轮钢的硬度先增加后下降,在540℃时硬度达到最大值,为42.3 HRC,抗拉强度和屈服强度先上升后下降,在420℃达到峰值;回火温度为482℃时,合金渗碳体以及M_(23)C_6碳化物转变为M_2C碳化物,弥散分布于马氏体基体中,保证了C61齿轮钢的强度及韧性;当回火温度超过600℃时,马氏体开始分解,M_2C碳化物长大,与基体的共格关系遭到破坏。C61齿轮钢最佳的回火温度为482℃,此时抗拉强度为1193 MPa,屈服强度为1151 MPa,冲击吸收能量为174.5 J,硬度为42.0 HRC,能够达到较好的力学性能匹配。

关键词(KeyWords)： C61齿轮钢;显微组织;力学性能;回火温度;M_2C碳化物

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51574147,51790418)

作者(Author): 梁晓东,吕加伟,闫浩,赵子君,王馨缘,孟佳明,王旭

DOI: 10.13289/j.issn.1009-6264.2021-0294

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