高气压环境下脉冲MAG焊气体混合比对焊缝成形的影响  

Influence of pulsed MAG welding gas mixing ratio of the weld in high pressure environment

作　　者：张永明[1] 黄松涛[1] 周灿丰[1] 

机构地区：[1]北京石油化工学院机械工程学院,北京102617

出　　处：《电焊机》2015年第11期147-150,共4页Electric Welding Machine

基　　金：国家自然科学基金(51175046)

摘　　要：在高气压环境下,通过改变保护气体中Ar/CO2气体混合配比,对焊缝金属断面形状、熔深和熔宽等参数进行试验研究,分析压力环境下气体混合比对脉冲MAG焊缝成形的影响,试验表明压力环境下保护气体中CO2含量对焊缝成形的影响与常压时相同,随着保护气体中CO2含量的增加,焊缝表面成形变差,熔宽和熔深增加,焊缝余高略有降低;随着保护气体中Ar比例的增加,焊缝熔池底部由圆弧状熔深逐渐变成指状熔深,当保护气体为纯Ar时,熔池指状熔深更为明显。In the high-pressure environment,by changing the shielding gas Ar/CO2 gas mixture ratio,cross-sectional shape of the weld metal,weld penetration and weld width and other parameters were studied,analysis of the gas mixing ratio on the pulse MAG weld. The test showed that the impact of atmospheric carbon dioxide under pressure to weld the same with under normal pressure, with the increase of CO2 content in the shielding gas, welding surface deformation was poor,fusion width and penetration increased, the weld residual high slightly reduced; with the shielding gas Ar ratio increased, weld the bottom by the arc shape gradually became finger depth of mohen deep,when the protective gas was pure Ar,the depth of molten pool finger was more apparent.

关 键 词：高气压环境 脉冲MAG焊 气体配比 焊缝成形 

分 类 号：TG444.74[金属学及工艺—焊接]