直线导轨渐进感应淬火过程多物理场耦合分析

Multiphysics coupling analysis of progressive induction hardening process of linear slider

基于ANSYS软件构建了直线导轨渐进感应淬火过程的三维有限元模型,并对感应淬火过程进行了“电-磁-热-机”及相变过程的多物理场耦合分析。通过自主开发的用户子程序,基于非等温JMA方程计算导轨表面在感应加热过程中生成的奥氏体体积分数;基于K-M模型计算冷却过程中生成的马氏体体积分数;基于相变初应变模型计算感应淬火过程中由相变引起的初应变和相变塑性。根据数值模拟结果,得到了优化设计的导轨感应淬火工艺参数,并将数值模拟结果与实验结果进行对比,结果表明:组织场数值模拟的结果与实验结果吻合较好,优化后的感应淬火工艺参数具有较高的可行性。研究结果可为直线导轨感应淬火工艺参数的设计提供一定的理论依据和较好的技术指导。

Based on ANSYS software,a three-dimensional finite element model of the progressive induction hardening process of linear slider was constructed,and the induction hardening process was analyzed by multiphysics coupling of“electricity-magnetism-thermal-mechanical”model and phase transformation process.Through a self-developed user subroutine,the volume fraction of austenite on the slider surface generated in the induction heating process was calculated based on the non-isothermal Johnson-Mehl-Avrami(JMA)equation.Then,the volume fraction of martensite generated in the quenching process was calculated based on the Kubelka-Munk(K-M)model.The initial strain and phase-transformation plasticity caused by phase transformation and in induction hardening were calculated based on the phase transformation initial strain model.The technological parameters of the optimized slider induction hardening process were obtained based on the numerical simulation results.The comparison of the numerical simulation and the experiment shows that the simulation results of the phase transformation field are in a good agreement with the experimental results,and that the technological parameters of the optimized induction hardening have higher feasibility.The research results can provide certain theoretical basis and better technical guidance for the design of induction hardening process parameters of linear slider.