锻压技术

汽车轮毂轴承芯轴锻造微观组织演变及工艺优化

英文标题：Microstructure evolution and process optimization of forging for automobile hub bearing mandrel

作者：张日1 2 康乃正2 黄江华2 纪宏超1 2 3 裴未迟1 黄晓敏1 孙超凡1

单位：1. 华北理工大学机械工程学院 2. 浙江兆丰机电股份有限公司 3. 浙江大学材料科学与工程学院

分类号：TG316.3

出版年,卷(期):页码：2025,50(8):1-10

摘要：

汽车轮毂轴承芯轴锻件的微观组织受热变形影响，对锻造成形质量有很大影响。以等温热压缩实验为基础，结合Deform软件建立了嵌入微观组织模型的三维半对称有限元模型，分析了温度、等效应变、动态再结晶行为和晶粒尺寸变化，通过田口实验法研究锻造温度、锻造速度和摩擦因数对汽车轮毂轴承芯轴锻件组织的影响，得出在锻造温度为1100 ℃、锻造速度为350 mm·s-1和摩擦因数为0.1条件下的汽车轮毂轴承芯轴锻件的晶粒尺寸比较细小。最后，在最佳工艺参数下进行生产试制，并对锻后组织进行分析，结果符合生产要求。

The microstructure of automobile wheel bearing mandrel forgings is affected by the thermal deformation, which has a great influence on the forging quality. Therefore, based on the isothermal hot compression test, a three-dimensional semi-symmetric finite element model embedded in the microstructure model was established by using software Deform, and the changes of temperature, equivalent strain, dynamic recrystallization behavior and grain size were analyzed. Then, the influences of forging temperature, forging speed and friction coefficient on the microstructure of automobile wheel bearing mandrel forgings were investigated by using the Taguchi method. And it is concluded that the grain size of automobile wheel bearing mandrel forgings is relatively small under the conditions of the forging temperature of 1100 ℃,the forging speed of 350 mm·s-1 and the friction coefficient of 0.1. Finally, the trial production was conducted under the optimal process parameters, and the post-forging microstructure was analyzed. The results indicate that the requirements for production are met.

基金项目：

河北省教育厅产学研专项(CXY2024054)；唐山市人才计划项目（A202202008）

作者简介：张日（2000-），男，硕士研究生 E-mail：1587131484@qq.com 通信作者：纪宏超（1986-），男，博士，教授 E-mail：jihongchao@ncst.edu.cn

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