2A12铝合金熔焊过程气孔形成机制分析  

Analysis on Pore Formation Mechanism of 2A12 Aluminum Alloy Fusion Welding Process

作　　者：李珉[1] 陈玉芳[1] 肖金桐[1] 赵福伟[1] 

机构地区：[1]河北工程技术高等专科学校,河北沧州061001

出　　处：《铸造技术》2014年第3期574-576,共3页Foundry Technology

基　　金：河北省教育厅科研基金资助(JYGH2011016)

摘　　要：以2A12铝合金为研究对象,实验研究了该材料在激光焊接过程中重熔区局部气孔形貌,结合理想气体状态数学模型分析了气孔形成机理。结果表明,随着激光功率的增大,2A12压铸铝合金重熔区气孔问题严重。铸件内预存微观气孔大部分演变为宏观气孔,是导致2A12熔化焊接接头多气孔的主要原因。Taking 2A12 aluminum alloy as research object, the material was studied by experiments in the process of laser welding, the porosity morphology of local remelting area and porosity forming mechanism were analyzed combining with the ideal gas state mathematical model. The results show that, with the increase of laser power, the porosity problem of 2A12 die-casting aluminum alloy in remelting area is serious. The micro pores evolve into macro porosity in the castings, which is the main reason of more porosity in the 2A12 melting weld.

关 键 词：2A12铝合金 熔焊 气孔 

分 类 号：TG457.14[金属学及工艺—焊接]