U71Mn重轨轨头淬火应力场及其影响因素研究  

Stress field and its influencing factors of U71Mn rail-head during quenching

作　　者：李公法[1] 屈海端[1] 杨金堂[1] 尹强 龙华[1] 张小亮[1] 

机构地区：[1]武汉科技大学机械自动化学院,武汉430081 [2]红林机械厂第九研究室,孝感432000

出　　处：《现代制造工程》2010年第4期91-94,149,共5页Modern Manufacturing Engineering

基　　金：教育部科学技术研究项目(03088);湖北省自然科学基金项目(2002AB070);湖北省武汉市科学技术局科技攻关项目(20061002052)

摘　　要：利用有限元分析软件对U71Mn重轨轨头淬火过程中的应力场进行数值模拟,并对影响其分布的各种因素进行研究。结果表明,准确选择淬火时加热、保温时间和风冷时的压强,能显著降低轨头的淬火应力,对U71Mn重轨轨头热处理中相关参数的选择具有重要的指导意义。Stress field of U71Mn rail-heads when quenching were simulated by the FEM software. And various kinds of factors that may influence the stress field＇s distribution were studied. The result shows that heavy rail-head＇s stress can be significantly fallen down, if the heating, holding time and the air pressure when cooling can be correctly choose. It is significantly valuable for the choice of relevant parameters for the heat treatment of U71Mn heavy rail.

关 键 词：U71Mn重轨 淬火 应力场 影响因素 有限元法 

分 类 号：TG156.33[金属学及工艺—热处理]