摘要
提出了可增加焊接熔深,改善难熔焊接结构熔合不良,获得高质量焊接接头的活性熔化极气体保护焊焊接新方法。对铝合金、耐候钢两种材料进行活性熔化极气体保护焊接工艺试验,研究焊缝成形、焊接工艺、焊接电弧特征、断口形貌及力学性能等。试验结果表明:活性熔化极气体保护焊电弧收缩显著,电弧形态更加集中,焊缝表面及焊接接头内部质量高;同等焊接热输入下,活性熔化极气体保护焊比熔化极气体保护焊的熔深增加显著,在不降低拉伸弯曲力学性能的同时,冲击韧性得到提高。
A new welding method of activating MAG/MIG(A-MAG/MIG)welding was proposed,which can improve weld penetration,and obtain high quality welded joints. Serial welding experiments were performed in aluminum alloy and weathering steel. The welding procedure,arc shape,mechanical property,arc morphology of the welding method were analyzed. The results show the current density of A-MAG/MIG welding is higher than MIG welding attributing to the arc shrinkage. The surface appearance and internal quality of welded joint are better. The A-MAG/MIG welding can improve weld penetration,compared with MAG/MIG welding under the same heat input. The tensile property and bending strength of A-MAG/MIG welded joint are not reduced while impact strength is improved.
出处
《兵器材料科学与工程》
CAS
CSCD
北大核心
2015年第4期64-67,共4页
Ordnance Material Science and Engineering
基金
四方股份工艺开发资助项目(2012069)