Transactions of Materials and Heat Treatment

Title：Microstructure evolution and process optimization of forging for automobile hub bearing mandrel

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ClassificationCode：TG316.3

year,vol(issue):pagenumber：2025,50(8):1-10

Abstract：

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.

Funds：

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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