重轨轨头淬火应力场的计算机模拟  

Computer Simulation of Quenching Stress Filed During Rail-Head Quenching Process for Heavy Rail

作　　者：杨金堂[1] 龙华[1] 王兴东[1] 李公法[1] 廖力成[1] 

机构地区：[1]武汉科技大学机械自动化学院,武汉430081

出　　处：《冶金设备》2009年第1期10-14,共5页Metallurgical Equipment

基　　金：湖北省自然科学基金(2007ABA256)

摘　　要：利用有限元法研究了重轨轨头在淬火过程中的应力场分布。模拟计算的过程中利用等效热容法处理相变潜热对温度场的影响,用等效线膨胀系数法处理相变引起的组织应力,同时考虑了材料的非线性参数对温度场的影响。研究结果表明温度的模拟结果与实测结果吻合较好,喷风淬火可以产生较小的残余热应力,避免了钢轨的变形和开裂。The quenching process of rail-head was simulated to study the stress filed by FE method. In this model, the equivalent thermal capacity method was used to deal with the influence of latent heat of phase transforma- tion on temperature filed and the transformation stress which resulted from phase transformation was taken into ac- count using the equivalent linear expansion cofficient methord. The impact of material＇ s non-linear parameter on temperature field was considered. The results show that the simulation result is identical with the measuring tempera- ture. Gas quenching can induce lower residual stresses and protect the heaw rail from distortion and cracking.

关 键 词：重轨轨头 淬火 温度场 应力场 有限元 

分 类 号：TG156.33[金属学及工艺—热处理]