锻压技术

42CrMo钢超声滚挤压力学性能研究及参数优化

英文标题：Study on mechanical properties and parameter optimization for 42CrMo steel ultrasonic rolling extrusion

作者：石青松徐红玉王晓强李昭王排岗

单位：河南科技大学

分类号：TG376.1

出版年,卷(期):页码：2024,49(3):75-85

摘要：

为提高42CrMo钢轴承套圈的力学性能，基于超声滚挤压加工过程中滚压头的运动学分析和改进的J-C本构模型，对不同参数下42CrMo钢轴承套圈的超声滚挤压加工过程进行了有限元数值模拟，建立了响应曲面预测模型及交互响应曲面图，并研究了不同参数对力学性能的影响规律。结果表明：残余压应力随着转速和进给速度的增大先增大后减小，与振幅和静压力为正比例关系；硬度与振幅和静压力为正比例关系，与进给速度为反比例关系，而随着转速的增大先增大后减小。使用自适应模拟退火算法对仿真预测模型进行优化，得到了最优加工参数解集为：转速为290~360 r·min-1、进给速度为18~24 mm·min-1、振幅为19~22 μm、静压力为580~650 N，最优力学性能参数解集为：残余压应力为1002~1033 MPa、硬度为773~793 HV。最后通过实验验证了仿真模型以及优化结果的准确性。

In order to improve the mechanical properties of 42CrMo steel bearing rings, based on the kinematic analysis of rolling extrusion head during ultrasonic rolling extrusion process and the improved J-C constitutive model, a finite element numerical simulation of the ultrasonic rolling extrusion process for 42CrMo steel bearing rings under different parameters was carried out， the response surface prediction model and interactive response surface diagram were established, and the influence laws of different parameters on the mechanical properties were studied. The results show that the residual compressive stress increases first and then decreases with the inereasing of rotational speed and feeding speed, which is proportional to the amplitude and static pressure. The hardness is proportional to the amplitude and static pressure, and inversely proportional to the feeding speed. With the increasing of rotational speed, the hardness increases first and then decreases. Furthermore, the simulation prediction model was optimized by adaptive simulated annealing (ASA) algorithm. The obtained solution set of optimal processing parameters is the rotational speed of 290-360 r·min-1, the feeding speed of 18-24 mm·min-1, the amplitude of 19-22 μm, the static pressure of 580-650 N, and the obtained solution set of optimal mechanical property parameters is the residual compressive stress of 1002-1033 MPa and the hardness of 773-793 HV. Finally, the accuracy of the simulation model and optimization results is proved by experiment.

基金项目：

国家自然科学基金资助项目（U1804145）；国家重点研发计划（2018YFB2000405，2022YFC2805702)

作者简介：石青松（1998-），男，硕士研究生，E-mail：2964593482@qq.com；通信作者：徐红玉（1972-），男，博士，教授，E-mail：xuhongyu@haust.edu.cn

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