工艺参数对铝合金旁轴式等离子-MIG复合焊焊缝熔深的影响

Effects of Welding Parameters on Weld Penetration of Paraxial Plasma-MIG Hybrid Welding of 5083 Aluminum Alloy

以6 mm厚的5083铝合金为研究对象,采用等离子直流正接,MIG直流反接的旁轴式等离子-MIG复合焊工艺,研究了焊接速度、MIG电流、等离子电流、焊炬高度等工艺参数对焊缝熔深的影响。结果表明:各焊接参数对焊缝熔深都有影响。熔深随着焊接速度的增加而减小,随着MIG电流和等离子电流的增加而增加,随着焊炬高度的增加而先增加后减小。

In this study, the paraxial plasma-MIG hybrid welding with 6 mm thickness of 5083 aluminum alloy was carried out. The effects of welding parameters, such as welding velocity, MIG current, plasma current and welding torch height on the weld penetration, were investigated. The plasma arc was DCEN （direct current electrode negative） mode and MIG arc was DCEP （direct current electrode positive） mode. The results show that all of the welding parameters have the impacts on weld penetration. The weld penetration decreases with the acceleration of welding velocity, increases with the increase of MIG current and plasma current, and increases first and then decreases with the increase of the welding torch height.