高碳钢变温马氏体相变温度场及组织场数值模拟

Numerical Simulation of Temperature and Microstructure Field on High-Carbon Steel Temperature-changed Martensitic Transformation

本文应用ANSYS软件对高碳钢马氏体相变过程进行有限元模拟。选用非扩散型相变经验公式、等效热容法建立相变过程组织变化、温度的耦合分析模型，通过动力学曲线获得残余奥氏体的分布趋势。结果表明：T12钢试件因含碳量增大，热扩散过程和导热程度明显减少，水淬过程中表面与心部的冷却速度更加均衡，并且相变动力性较弱，相变阻力较大。

This paper applied the software ANSYS simulating transformation process of high-carbon steel martensit- ie. The non-diffusion phase change empirical formula and the equivalent heat capacity method were used to establish the coupled analysis model of the mierostrueture change and temperature in the phase transition process, and getting distribution trend of retained austenite by dynamic curve. The results showed that the heat diffusion process and the thermal conductivity of T12 steel were obviously reduced because of the increase of carbon content. The cooling rate of the surface and the heart was more balanced during the water quenching process, and the phase change power was weak, and the phase change resistance was larger.