激光焊接工艺参数对稀土镁合金焊缝成形的影响  

Influence of laser welding parameters on Mg-Rare earth alloy welding seam

作　　者：戴军[1] 黄坚[1] 吴毅雄[1] 

机构地区：[1]上海交通大学上海市激光制造与材料改性重点实验室,上海200240

出　　处：《轻合金加工技术》2010年第7期53-56,共4页Light Alloy Fabrication Technology

摘　　要：采用高功率CO2激光对NZ30K稀土镁合金厚板进行焊接工艺性研究。探讨了激光功率、焊接速度、激光离焦量、侧吹气体流量、背面保护气体流量等焊接工艺参数对焊缝成形的影响。试验结果表明,在单道熔透的情况下,上述焊接工艺参数对焊缝成形均有影响,其中激光功率和焊接速度的影响最明显,焊缝背面熔宽受到焊接工艺参数的影响最大。在合适的激光焊接工艺下,得到了稀土镁合金NZ30K厚板成形良好的焊缝。The welding precess of NZ30K Mg-Rare-earth alloy plate was studied using high power CO2 laser.The factors which influence the welding seam were investigated,such as the laser power,welding speed,laser focusing position,the side gas flow rate and back gas flow rate.The result shows that at the condition of melt through with the single welding pass,all the above mentioned welding parameters affect the welding seam,the laser power and welding speed affect even more.The melt width on the plate back is affected the most with the parameters.The excellent welding seam on the NZ30K Mg-Rare-earth alloy plate can be obtained with the proper laser welding technology.

关 键 词：激光焊接 高功率CO2激光 NZ30K稀土镁合金 

分 类 号：TG456.7[金属学及工艺—焊接] TG146.22[一般工业技术—材料科学与工程]