锻压技术

汽车驱动电机轴承外圈感应回火工艺数值模拟分析

英文标题：Numerical simulation analysis on induction tempering process for automotive drive motor bearing outer ring

作者：魏文婷1 2 3 王贵龙1 2 3 赵天翼1 2 3

单位：1. 武汉理工大学现代汽车零部件技术湖北省重点实验室 2. 武汉理工大学汽车零部件技术湖北省协同创新中心 3. 武汉理工大学汽车工程学院

分类号：TG156

出版年,卷(期):页码：2024,49(7):251-263

摘要：

为了研究感应回火工艺参数对温度和组织分布的影响规律，实现对驱动电机轴承的微观组织调控，改善轴承表面硬度与力学性能，建立了轴承外圈感应回火电磁-温度-组织多场耦合有限元模型，研究了感应回火工艺参数对轴承截面温度场和组织含量的影响规律，并通过实验验证了仿真模型的有效性。结果表明：感应回火过程中，轴承截面沿径向出现了一定的温度差，残余奥氏体含量沿截面径向呈梯度分布；随着电流密度和电流频率的增加或空气间隙的减小，轴承外圈的温度差增大，径向整体残余奥氏体含量增高且梯度越明显。

In order to research the influence of induction tempering process parameters on temperature and microstructure distribution, realize the microstructure control of drive motor bearing, and improve the surface hardness and mechanical properties of bearing, a multi-field coupled electromagnetic-temperature-microstructure finite element model for induction tempering of bearing outer ring was established. Then, the influence laws of the induction tempering process parameters on the temperature field and the microstructure content of bearing cross-section were investigated, and the validity of the simulation model was verified by experiments. The results show that during the induction tempering process, the bearing cross-section appears a certain temperature difference along the radial direction, and the residual austenite content shows a gradient distribution along the radial direction of the cross-section. With the increasing of current density and current frequency or the decreasing of air gap, the temperature difference of bearing outer ring increases and the residual austenite content in the radial direction improves, and the gradient is more obvious.

基金项目：

湖北省自然科学基金面上项目( 2022CFB378)；省部共建耐火材料与冶金国家重点实验室开放基金（G202403）

作者简介：魏文婷（1985-），女，博士，副教授 E-mail：wei_wt@whut.edu.cn

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