激光-GMAW复合焊焊缝合金元素分布不均匀性研究  

Study on the Distribution Heterogeneity of Alloy Elements in Laser-GMAW Hybrid Welding

作　　者：马晓阳 李治[1] 薛钢[1] 吴艳明[1] MA Xiaoyang;LI Zhi;XUE Gang;WU Yanming(Luoyang Ship Material Research Institute,Luoyang 471023,China)

机构地区：[1]中国船舶重工集团公司第七二五研究所,河南洛阳471023

出　　处：《材料开发与应用》2020年第5期87-91,共5页Development and Application of Materials

摘　　要：采用EH36钢板进行激光-GMAW复合焊堆焊试验,研究了热源相对位置、热源参数和激光束摆动参数等对焊缝Ni元素分布不均匀性的影响。结果表明:与电弧引导激光焊接相比,激光引导电弧焊接时焊缝Ni元素分布较均匀,这是因为该焊接方向下,熔池向下流动趋势增大,促进了Ni元素的均匀分布;随着激光束摆动幅度或摆动频率的增大,焊缝Ni元素分布均匀程度增大。激光束的摆动对熔池搅拌作用增强,同时焊缝凝固速度降低,熔池内合金元素扩散和对流作用能充分进行。Laser-GMAW hybrid welding was carried on EH36 steel plate to study the effects of relative position of heat source,heat source parameters and laser beam parameters on the distribution of Ni element.The results show that compared with arc leading welding,Ni element distributes more uniformly by laser leading welding.This is because the downward flow trend of the molten pool increases in the welding direction,which promotes the uniform distribution of Ni element.The uniformity of Ni element distribution in the weld increases with the increase of laser beam swing amplitude or frequency.The laser beam swing enhances the mixing effect of the molten pool,and the solidification speed of the weld decreases,therefore,the diffusion and convection of alloy elements in the molten pool can be fully carried out.

关 键 词：热源相对位置 激光束摆动参数 元素分布 

分 类 号：TG456.7[金属学及工艺—焊接]