5052铝合金CO_2激光-MIG复合焊接气孔特性分析  

Analysis of porosity characteristics of 5052 aluminum alloy welded by hybrid CO_2 laser-MIG welding

作　　者：马志华[1] 陈东高[1] 李娜[2] 谭兵[1] 

机构地区：[1]中国兵器科学研究院宁波分院焊接工艺与材料研究室,宁波315103 [2]浙江工业大学机械工程学院,杭州310014

出　　处：《激光技术》2012年第6期780-782,共3页Laser Technology

基　　金：国家八六三高新技术研究发展计划资助项目(2009AA03Z517);宁波市自然科学基金资助项目(201001A6006004)

摘　　要：CO2激光-金属惰性气体保护焊(MIG)复合焊接作为一种高效快速的焊接方法,其焊接铝合金较易产生气孔。为了分析中厚度铝合金CO2激光-MIG复合焊接气孔特性,采用在10mm厚的5052铝合金上进行堆焊试验的方法进行了理论分析和实验验证,可知热源间距和背部保护气垫块对铝合金CO2激光-MIG复合焊接气孔有较大的影响,热源间距在2mm～3mm时气孔率最小。结果表明,采用背部保护气垫块可以有效抑制气孔。Hybrid CO2 laser-metal inertia gas （MIG） welding is an efficient and fast welding method, however, porosity is prone to produce when welding aluminum alloy. In order to analyze the porosity characteristics of aluminum alloy in medium thickness by means of hybrid CO： laser-MIG welding, 10mm thick 5052 aluminum alloy was welded by means of bead weld. Theoretical analysis and experimental verification was carried out, The results show that the heat source space and the back protection cushion block influence the porosity obviously. The porosity rate is minimum when the heat source spacing is 2mm-3mm. Porosity can be effectively suppressed by the back protection of cushion block.

关 键 词：激光技术 气孔 CO2激光 热源间距 复合焊接 中厚度铝合金 

分 类 号：TG456.7[金属学及工艺—焊接]