二辊横轧圆坯过程的应力场和应变场及破裂的倾向性  

Strain Field and Stress Field, and Fracture Tendency of Round Billet during Two-Roll Cross-Rolling

作　　者：李胜祗[1] 陈大宏[1] 孙中建[1] 

机构地区：[1]安徽工业大学冶金与材料学院,安徽马鞍山243002

出　　处：《钢铁研究学报》2003年第1期67-70,共4页Journal of Iron and Steel Research

摘　　要：用MARC Autoforge有限元软件,对圆坯的横轧过程进行了热 力学耦合分析,得到了变形和应力分布。用数值分析法研究了横轧圆坯时出现破裂的倾向性。结果表明:当圆坯的变形积累到一定程度时,坯料中心韧性破裂的倾向性增强,直至开始出现裂纹。随着轧制进程的继续,韧性断裂区逐渐扩展。The coupled thermomechanical analysis of crossrolling process for round billet was conducted with aid of FE code MARC/Autoforge. The distribution of deformation and stress was obtained from numerical simulation. The tendency of fracture in round billet during crossrolling process was studied using numerical method. The results showed that the tendency of centralcrack increases as the deformation is accumulated to some extent. As the rolling process proceeds, the tough fracture zone expands gradually.

关 键 词：钢坯 横轧 应力 应变 塑性变形 破裂 有限元法 热-力学耦合 数值模拟 

分 类 号：TG335.3[金属学及工艺—金属压力加工]