异厚度铝钢电弧辅助激光对接熔钎焊温度场和应力应变场数值模拟  

Numerical simulation of temperature field and stress-strain field in brazed-fusion butt joint between aluminum alloy and galvanized steel with different thickness by arc-assisted laser

作　　者：刘剑[1] 樊丁[1] 陈秀娟[2] 黄健康[1] 余淑荣[2] LIU Jian;FAN Ding;CHEN Xiujuan;HUANG Jiankang;YU Shurong(State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals,Lanzhou University of Technology,Lanzhou 730050,China;School of Mechanical and Electrical Engineering,Lanzhou University of Technology,Lanzhou 730050,China)

机构地区：[1]兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室,兰州730050 [2]兰州理工大学机电工程学院,兰州730050

出　　处：《焊接学报》2018年第2期33-38,130,共7页Transactions of The China Welding Institution

基　　金：国家自然科学基金资助项目(51465031);甘肃省自然基金项目(1308RJZA158);甘肃省青年科技基金计划资助项目(145RJYA305)

摘　　要：以厚度2 mm的5A06铝合金板和1 mm热镀锌ST04Z钢对接熔钎焊试验为研究对象.采用ANSYS有限元软件,选用高斯函数分布的热源模型模拟TIG电弧和三维锥体热源模型模拟激光的不重合组合热源.基于所建立的不重合组合热源模型对温度场和应力场进行耦合分析,得到焊接过程中的温度场和应力应变分布.结果表明,铝钢异厚度熔钎焊在焊缝及其附近区域中的纵向应力是拉应力,钢一侧远离焊缝产生较大的压应力,变形较大;铝合金一侧远离焊缝产生相应的变形,压应力相对较小,温度场、残余应力模拟结果与试验结果吻合较好,证明所建组合热源模型正确.The brazed-fusion welded joint prepared by 5A06 aluminum alloy sheet of 2 mm in thickness and ST04Z steel sheet with 1 mm in thickness was taken as the research object.Based on ANSYS finite element software,the misalign hybrid heat source combined Gaussian heat source model for TIG arc and 3D pyramidal heat source model for laser heat source was founded,and the temperature field and the stress strain distribution in the welding process were obtained by using Coupling Analysis.The results show that the are used the longitudinal stress in brazed-fusion welded joint of 5A06 aluminum alloy sheet and ST04Z steel sheet with different thickness and its adjacent zone is tensile stress.Large compressive stress and severe deformation occur in the steel side away from the weld seam.Relative small compressive stress and deformation happen in the aluminum side away from the weld seam.Temperature field and residual stress simulation results are in good agreement with the experiment results,which proves that the heat source model is correct.

关 键 词：铝钢 电弧辅助激光 熔钎焊 数值模拟 

分 类 号：TG457[金属学及工艺—焊接]