张雪姣,杨康,李萌蘖,宋肖阳,朱琳

• 1:天津重型装备工程研究有限公司
• 2:昆明理工大学材料科学与工程学院

摘要(Abstract)：

以两个直径为600 mm,长度为1800 mm的45Cr4NiMoV圆柱形试验件为研究对象,对其进行了部分硬化淬回火热处理,在其中一个试验件上进行敷偶测温及宏观金相检测实验,在另一个试验件上应用Sachs法进行残余应力的测量;建立了试验件淬回火过程中的温度、组织、应力演变模型,并验证了模型的准确性。研究了部分硬化大截面轴类件热处理残余应力的演变过程,讨论了材料参数、边界条件对有限元模拟残余应力分布结果的影响。结果表明,模拟与实测应力吻合较好,试验件由于尺寸较大整体呈现出表面压心部拉的热应力型分布特征,淬硬层附近呈现出内压外拉的相变应力特征。马氏体转变温度降低、膨胀系数降低、相变塑性增大使工件心部应力减小,表面应力增大;换热系数增大,则心部应力增大,表面应力降低。

关键词(KeyWords)： 数值模拟;热处理;残余应力;支承辊;Sachs法

Abstract:

Keywords:

基金项目(Foundation): 天津市科技支撑重点项目(17YFZCGX00900)

作者(Author): 张雪姣,杨康,李萌蘖,宋肖阳,朱琳

DOI: 10.13289/j.issn.1009-6264.2020-0470

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