WE43镁合金激光焊接数值模拟  

Numerical simulation of laser welding of WE43 magnesium alloy

作　　者：熊发林 刘军[1] 冉合利 黄飞[1] 孙立人[1] XIONG Fa-lin;LIU Jun;RAN He-li;HUANG Fei;SUN Li-ren(School of Materials Science and Engineering, Inner Mongolia University of Technology, Hohhot 010051, China)

机构地区：[1]内蒙古工业大学材料科学与工程学院

出　　处：《轻合金加工技术》2019年第10期40-45,共6页Light Alloy Fabrication Technology

摘　　要：采用WE43镁合金作为试验材料,根据激光热源的特性,选择3D圆锥热源模型和WE43镁合金的属性建立焊接模型,在熔池校核准确的基础上,通过SYSWELD焊接模拟软件对焊接温度场和残余应力场进行模拟,将模拟结果与实测结果对比。结果表明,焊接温度分布的模拟结果与实测结果具有一致性;由于存在测量误差等原因,残余应力分布的模拟结果与实测结果有一定误差,但两者总体分布趋势一致。在精准优化材料数据库和模拟各项参数的情况下,有限元模拟完全可以作为一种预测手段,具有一定的实际借鉴意义。According to characteristics of the laser heat source,the 3 D conical heat source model and WE43 magnesium alloy properties are selected,and then the welding model is established with WE43 magnesium alloy as the test material. On the basis of accurate weld pool check,the welding temperature field and residual stress field are simulated by SYSWELD welding simulation software,and the simulation results are compared with the measured results. The results show that the simulation results of welding temperature distribution are consistent with the measured results. Due to measurement errors and other reasons,the simulation results of residual stress distribution have some errors with the measured results,but the overall distribution trends of the two are consistent. In the case of precise optimization of material database and simulation of various parameters,finite element simulation can be used as a prediction method,which has certain practical reference significance.

关 键 词：WE43镁合金 激光焊接 焊接温度场 残余应力 

分 类 号：TG456.7[金属学及工艺—焊接] TG146.22[一般工业技术—材料科学与工程]