基于超声辅助的Q235镀锌钢板MIG焊电弧行为数值模拟  

Numerical simulation of MIG welding arc behavior of Q235 galvanized steel plate based on ultrasonic assistance

作　　者：贾浩 洪蕾 曹龙[1,2] 付水淇 马国红 JIA Hao;HONG Lei;CAO Long;FU Shuiqi;MA Guohong(School of Advanced Manufacturing,Nanchang University,Nanchang 330031,China;Key Laboratory of Lightweight and High Strength Structural Materials of Jiangxi Province,Nanchang 330031,China)

机构地区：[1]南昌大学先进制造学院,江西南昌330031 [2]江西省轻质高强结构材料重点实验室,江西南昌330031

出　　处：《南昌大学学报（工科版）》2023年第2期176-182,共7页Journal of Nanchang University(Engineering & Technology)

基　　金：国家自然科学基金项目(51665037)。

摘　　要：针对超声辅助熔化极惰性气体保护焊(U-MIG)电弧行为,建立了二维瞬态数值模型,利用流体力学与电磁学理论,模拟了2种焊接工艺电弧等离子体的温度场、电流密度和电弧形貌等结果,并与普通MIG焊电弧进行对比。结果表明:超声的添加使焊接电弧成形过程发生了明显变化。相同焊接参数下,U-MIG焊电弧高温区面积增大,温度峰值上升;电弧区域内电流密度增大,电弧更加密集,能量更加集中,同时电弧压力增大;电弧中粒子电离度增加,粒子能量增加,提升了U-MIG焊接质量。模拟的电弧形貌与实验结果相吻合,验证了模拟的准确性。A two-dimensional transient numerical model was established for the arc forming of ultrasonic-assisted melt insert-gas welding(U-MIG).The temperature field,current density and arc morphology of the arc plasma of the two welding processes were simulated by using the theories of hydrodynamics and electromagnetism,and compared with the ordinary MIG welding arc.The results showed that the addition of ultrasonic make the welding arc forming change obviously.Under the same welding parameters,the high temperature area of U-MIG welding arc increased and the peak temperature rised.With the increase of arc current density,the arc was more dense,the energy was more concentrated,and the arc pressure increased.The ionization degree of particles in the arc increased,the particle energy increased,and the U-MIG welding quality was improved.The simulated arc morphology was consistent with the experimental results,which verified the accuracy of the simulation.

关 键 词：超声辅助MIG焊 数值模拟 电弧成形 电流密度 温度场 

分 类 号：TG402[金属学及工艺—焊接]