工艺参数对复合焊接接头形貌和熔滴过渡的影响  

Effect of Process Parameters on the Morphology and Droplet Transfer of Hybrid Welding Joint

作　　者：汝连志 刘凤德[1] 张宏[1] 徐春鹰[1] 刘双宇[1] 

机构地区：[1]长春理工大学机电工程学院,吉林长春130022

出　　处：《应用激光》2017年第4期515-520,共6页Applied Laser

摘　　要：以5.0mm厚高强钢板为试验材料,进行了CO_2激光-熔化极活性气体保护焊(Metal active gas,MAG)电弧复合焊接试验。采用高速摄像系统观测熔滴形态的变化以及过渡模式,并采集焊接过程中的电弧和熔滴图像,通过试验深入研究激光功率与电弧功率匹配对复合焊接过程中焊接稳定性、焊缝形貌、熔滴形态以及过渡模式的影响。研究表明,当电流为200A,电压27V时,激光功率变化过程中,熔滴过渡处于射流过渡状态,焊缝表面形貌较好,焊缝平滑连续,没有明显缺陷;其他参数不变,随着激光功率增大焊缝熔深增大,随着电弧电压与电流增大熔宽增大;当I=180A,U=26V时,电弧弧柱面积增大,激光对电弧吸引作用增强,促使熔滴过渡比较稳定,使熔滴作用点与激光作用点完全重合。The CO_2 laser-metal active gas（MAG）arc hybrid welding test is carried out with 5.0mm thick high strength steel plate as test material.A high-speed camera system is used to observe the change of the droplet morphology and the transfer mode,and collect the arc and droplet images during welding.The effects of laser power and arc power matching on the welding stability,weld morphology,droplet morphology and transfer mode during the hybrid welding process are studied by experiment.The results show that when the current is 200 A and the voltage is 27 V,in the process of laser power change,the droplet transition is in the state of jet transition,the surface morphology of the weld is good and the weld is smooth and continuous without obvious defect.Other parameters unchanged,with the laser power increases the weld penetration increases,with the arc voltage and current increases the melting width increases.When I=180A and U=26V,the area of arc column increases,and the effect of laser on arc attracting is enhanced,which makes the droplet transfer more stable,so that the droplet action point and laser action point completely coincide.

关 键 词：复合焊接 激光功率 电弧功率 焊缝形貌 熔滴过渡 

分 类 号：TG409[金属学及工艺—焊接]