Nd:YAG激光+CMT电弧复合热源横焊工艺参数对焊缝形貌的影响  

Influences of Nd:YAG laser+CMT arc hybrid horizontal welding parameters on weld shape

作　　者：刘西洋[1] 王旭友[1] 岳燕星[2] 杜兵[1] 

机构地区：[1]哈尔滨焊接研究所,哈尔滨150080 [2]黑龙江省经济管理干部学院,哈尔滨150040

出　　处：《焊接学报》2012年第9期45-48,115,共4页Transactions of The China Welding Institution

基　　金：国家"十一五"科技支撑计划资助项目(2006BAF04B10);机械科学研究总院院技术发展基金资助项目(20080601)

摘　　要：以304不锈钢为对象,借助横焊焊缝横断面图像来分析Nd:YAG激光+CMT电弧复合热源横焊焊缝横断面的成形特征,研究了Nd:YAG激光+CMT电弧复合热源横焊过程中焊接工艺参数对焊缝横断面形貌的影响.结果表明,在Nd:YAG激光+CMT电弧复合热源横焊中,焊接工艺参数对横焊焊缝横断面形貌的影响显著;Nd:YAG激光加入CMT电弧焊中明显提高了复合焊缝以及复合焊中CMT焊缝的熔深;采取适当的焊接工艺参数(小的光丝间距、大的激光功率、小的焊接速度、适合的离焦量以及小的或大的CMT功率)可以避免熔池机械式叠加和焊缝横断面错位现象,使得焊缝成形良好.The cross-section appearance characteristics of Nd:YAG laser+CMT arc hybrid horizontal welding on 304 stainless steel was evaluated by the welding weld cross-sectional images.The influence of welding parameters on weld cross-section appearance in Nd: YAG laser+CMT arc hybrid horizontal welding were studied.The results indicated that there is a great influence of weld parameters on the weld cross-section shape in YAG laser+CMT arc hybrid horizontal welding.The addition of Nd: YAG laser into CMT arc welding can significantly improve the composite weld and CMT weld penetration in hybrid welded joint.By appropriate welding parameters(the small laser-wire distance,large laser power,the low welding speed,appropriate defocusing distance and low or high CMT power),the mechanical overlay of the weld pool and dislocation of the weld cross-section can be avoided,and the good weld appearance can be obtained.

关 键 词：激光焊 复合热源横焊 CMT横焊 焊缝横断面形貌 

分 类 号：TG456[金属学及工艺—焊接]