T型接头激光-MAG复合热源焊接工艺适应性研究  

Adaptability of laser-MAG hybrid welding process for T joint

作　　者：徐良[1] 王金奎[1] 苏金花[1] 徐玉君[1] 刘恒 范灵利 

机构地区：[1]机械科学研究院哈尔滨焊接研究所,150028 [2]沈阳鼓风机集团核电泵业有限公司,100869

出　　处：《焊接》2015年第6期60-63,76,共4页Welding & Joining

摘　　要：钢材中厚板T型接头采用MAG焊时，由于MAG焊熔透能力有限，根部打底焊时难以实现良好的单面焊双面成形，成为制约焊接生产的难题。激光-MAG复合热源焊接具有熔深大、焊速高、焊接过程稳定等突出优势，在进行SMA490BW材料T型接头复合焊接时，坡口钝边尺寸在2～4mm之间变化，组装间隙在0～1．5mm之间变化，组装点固焊缝高度小于4mm时，可实现同一焊接工艺参数下良好的单面焊双面成形，接头疲劳性能比MAG焊提高37％，具有较强的工程应用价值。When MAG welding was used in welding of T joint for large thick plates,the one- side welding with back formation was difficultly achieved in backing welding of root weld because of the limited penetration capacity of MAG welding,and it had been considered as a difficult problem in welding production.There are many significant advantages for laser- MAG hybrid welding,for example,deep penetration,high welding speed,stable welding process and so on.If the laser- MAG hybrid welding method was used for T-joint of SMA490 BW material,when the width of root face is about 2 ~ 4 mm,the changes range of assembly clearance is about 0~1.5 mm,the height of assembled tack weld is less than 4 mm,it can achieve a good one-side welding with back formation at the same welding parameters.The fatigue properties of joint by laser- MAG hybrid welding process is improved by 37 compared with the joint by MAG welding process,and it has a great value for engineering applications.

关 键 词：T型接头 打底焊 激光-MAG复合热源 单面焊双面成形 

分 类 号：TG456.7[金属学及工艺—焊接]