铝钢异种金属CMT焊接温度场的数值模拟  

Numerical simulation of temperature field of CMT welding for joining dissimilar metals of aluminum to steel

作　　者：曹睿[1] 余斯亮 王岑[2] 孙军浩[1] 陈剑虹[1] 

机构地区：[1]兰州理工大学甘肃省有色金属新材料重点实验室,甘肃兰州730050 [2]兰州理工大学有色金属合金及加工教育部重点实验室,甘肃兰州730050

出　　处：《兰州理工大学学报》2013年第5期19-22,共4页Journal of Lanzhou University of Technology

基　　金：国家自然科学基金(51265028;50905081)

摘　　要：利用大型通用有限元软件ABAQUS对铝钢异种金属CMT(cold metal transfer)焊接温度场分布进行数值模拟.计算过程中,采用双椭球热源和高斯热源分别考虑实际焊接时电弧加热和熔滴引入的热量对温度分布的影响.实验结果表明:在特定的工艺参数下,熔池中心的温度为960℃,计算所得到的热循环曲线和试验测得的热循环曲线取得较好的一致.镀锌钢板背面锌熔化的宽度为11mm,与实验结果吻合,所建立的热源模型也是合理的.Numerical simulation of temperature distribution of CMT （cold metal transfer） welding for joining dissimilar metals of aluminum to steel was carried out by using large-scaled general finite element analysis codes ABAQUS. During the process of simulation, a double-ellipsoid volume heat source model and a Gauss plane heat source were used to take into consideration of influence of the heat caused by arc and weld drops respectively on temperature field. The experiment results showed that the temperature at the weld center achieved 960 ~C, and series of experiments were performed to verify the numerical thermal circling curves, and a qualitative agreement was obtained. The melting width of galvanic layer on the back surface of steel sheet was 11 mm, which was consist with that of experiment and the heat source model created was rational.

关 键 词：异种金属 温度场 CMT 数值模拟 

分 类 号：TG409[金属学及工艺—焊接]