董成通,吴博雅,冯思远,王孝文,黎军顽

• 1:上海大学材料科学与工程学院
• 2:高品质特殊钢冶金与制备国家重点实验室
• 3:武汉理工大学汽车工程学院

摘要(Abstract)：

使用数值仿真的方法对40Cr钢汽车前轴淬火时组织场的演变和变形行为进行定量表征，通过构建多物理场耦合模型，分析了汽车前轴在不同冷却介质下进行淬火时组织场的变化规律，讨论了冷却介质对其变形行为的影响。结果表明：使用15%浓度的聚烷二醇聚合物(PAG)作为冷却介质，汽车前轴淬火后平均硬度约为44.65 HRC,轴头平均变形量约为0.122 mm,优于使用油和水冷却，这是由于全奥氏体化前轴在PAG溶液里形成的蒸汽膜随冷却时间延长而变厚，最后只能通过对流传热，致使高温冷却较快而低温冷却较慢，得到淬透性好、变形量较小的汽车前轴。

关键词(KeyWords)： 前轴;淬火;冷却介质;组织演变;变形

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划“高性能工模具钢及应用”(2016YFB0300400,2016YFB0300404)

作者(Author): 董成通,吴博雅,冯思远,王孝文,黎军顽

DOI: 10.13289/j.issn.1009-6264.2022-0092

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