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Finite-Element Simulation of Moving Induction Heat Treatment

机译:运动感应热处理的有限元模拟

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An efficient finite-element procedure with a remesh scheme has been developed for the analysis of the moving Induction heat treatment process, wherein relative motion occurs between the coil and the work-piece. In this procedure, the magnetic field is first simulated by using an updated mesh that tracks the moving coil position; the moving heat source within the workpiece material is derived from the magnetic field. The heat equation Is then solved to obtain the temperature field created by the heat source. The procedure has been applied to calculate the temperature distributions in 1080 carbon steel cylinders during induction heating. The calculations have been validated by comparison with analytical solutions for the temperature distribution obtained using Green's function methods. Finally, the temperature, residual stress, and microstructure distributions in quenched 1080 steel cylinders have been obtained using the finite-element procedure. Quenching of the heated cylinders, by both a moving cooling ring and a stationary liquid bath, has been analyzed. The finite-element procedure presented incorporates temperature-dependent material properties, phase transformations occurring In the l080 steel, the change in magnetic permeability of the 1080 steel at the Curie temperature, and an elastoplastic stress model based on a mixed hardening rule. The simulation results demonstrate that the finite-element procedure could be applied to a variety of moving induction heat treatment problems to determine the residual stress and microstructure distributions in the heat-treated component. It also could be used in the design of process parameters and coils.
机译:已经开发出一种有效的有限元程序,并采用了新颖的方案来分析运动的感应热处理过程,其中在线圈和工件之间发生相对运动。在此过程中,首先通过使用更新的网格跟踪运动的线圈位置来模拟磁场。工件材料中的移动热源是从磁场中获得的。然后求解热方程,以获得由热源产生的温度场。该程序已用于计算感应加热期间1080碳钢瓶中的温度分布。通过与使用格林函数方法获得的温度分布的解析解进行比较,对计算进行了验证。最后,使用有限元程序获得了淬火的1080钢圆柱体中的温度,残余应力和微观结构分布。分析了通过移动的冷却环和固定的液槽对加热后的气缸进行的淬火。提出的有限元程序包含了随温度变化的材料特性,在l080钢中发生的相变,在居里温度下1080钢的磁导率变化以及基于混合硬化规则的弹塑性应力模型。仿真结果表明,有限元程序可以应用于各种移动感应热处理问题,以确定热处理组件中的残余应力和微观结构分布。它也可以用于工艺参数和线圈的设计。

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