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3mm hou 5a06 lv he jin leng jin shu guo du (cmt) han shi yan yan jiu
Author(s): 
Pages: 43-45
Year: Issue:  8
Journal: Welding Technology

Keyword:  5A06铝合金冷金属过渡力学性能气孔;
Abstract: 针对3 mm厚5A06铝合金,采用冷金属过渡焊进行不同工艺参数平板对接试验。焊后得到了成形良好的焊接接头,抗拉强度在344~374 MPa之间。接头断裂位置有2种:一种从正面熔合线启裂沿约45°方向朝母材扩展断裂,另一种从母材沿约45°方向断裂,脉冲CMT接头大多断裂于母材,整体力学性能最好。当提前和滞后送气设置的时间在1~2 s时,引熄弧区域容易出现气孔类缺陷,增大提前和滞后送气时间至5 s,能够解决引弧、熄弧易出现气孔的问题。
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