Narrow gap groove plasma-MIG hybrid welding and numerical simulation of temperature field

窄坡口等离子-MIG复合焊及焊接温度场的数值模拟 Narrow gap groove plasma-MIG hybrid welding and numerical simulation of temperature field 田仁勇 TIAN Renyong 1 first-author 吴向阳 WU Xiangyang 1 张志毅 ZHANG Zhiyi 1 徐锋 XU Feng 1 黄继明 HUANG Jiming 2 金成 JIN Cheng 2 青岛四方机车车辆股份有限公司 青岛四方机车车辆股份有限公司 CRRC Qingdao Sifang Co.,Ltd. CRRC Qingdao Sifang Co.,Ltd. 大连交通大学材料科学与工程学院 大连交通大学材料科学与工程学院 School of Materials Science and Engineering,Dalian Jiaotong University School of Materials Science and Engineering,Dalian Jiaotong University 对等离子-MIG复合焊接技术在窄坡口焊接中的应用进行了研究。结合数值模拟技术,采用旋转体热源+双椭球组合热源模型,对焊接温度场进行了模拟计算;分析对比了等离子-MIG复合焊与传统MIG焊接头焊缝形态及焊接温度场上的异同。实验与数值模拟结果表明,等离子-MIG复合焊与传统MIG焊均可获得得成形良好的接头;等离子-MIG复合焊具有更小的焊缝和热影响区面积和更高的焊接效率;数值模拟与实验结果吻合良好,采用组合热源模型可较好地反映等离子-MIG复合焊的热输入特征。 The application of plasma-MIG hybrid welding technology in narrow groove welding is studied in this paper.Using numerical simulation technology, the combined heat source model of rotating body + double ellipsoid is applied to simulate the welding temperature field. The differences of weld shape and welding temperature field of welded joint between plasma-MIG hybrid welding and traditional MIG welding are analyze and compared. Experimental and numerical simulation results show that both the plasma-MIG hybrid welding and traditional MIG welding can provide wellformed joints. The plasma-MIG hybrid welding has smaller weld and heat affected zone area and higher welding efficiency than those of the traditional MIG welding. The numerical simulation is in good agreement with the experimental results. The combined heat source model can well reflect the heat input characteristics of plasma-MIG hybrid welding. 等离子-MIG复合焊 窄坡口 热源模型 温度场 数值模拟 plasma-MIG hybrid welding narrow gap groove heat source model temperature field numerical simulation TG456 2022-03-08 10 50