| 摘要: |
| 提出了激光-MIG复合双层焊接中厚板铝合金方法,该方法分两层进行焊接:第一层为打底焊,解决焊接熔深不足的问题;第二层为盖面焊,解决焊缝成形不良的问题.结果表明,在激光器额定功率为4 kW时,采用激光-MIG复合双层焊接方法焊接ZL114A材料的熔深可达10 mm,接头抗拉强度平均值为238 MPa,大于母材抗拉强度的80%.采用激光-MIG复合双层焊接方法焊接了某航天产品圆筒形模拟件,焊缝成形良好,熔深达到9 mm,焊缝内部无裂纹、未焊透及未熔合等缺陷,无可见夹杂物,存在的缺陷形式主要是链状气孔,气孔直径均小于1 mm,焊后基本无变形. |
| 关键词: 激光-MIG复合焊 双层焊接 中厚铝合金 |
| DOI： |
| 分类号: |
| 基金项目:总装备部装备预先研究项目(51318050103) |
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| Double-layers laser-MIG hybrid welding method in welding thick aluminum alloy |
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YAO Wei1, WANG Zhimin1, LI Hongwei1, WANG Chunming2
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1.Beijing Hangxing Machinery Manufacturing Corporation, Beijing 100013, China;2.Material Science and Technology College, Huazhong University of Science and Technology, Wuhan 430074, China
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| Abstract: |
| In this paper, double-layers laser-MIG welding of thick aluminum alloy method was put forward. It welds two layers:the first layer padding welding, to solve the problem of inadequate weld penetration; second welding surface for the cap to address the problem of the poor weld shape. The results showed that:rated at 4 kW lasers when the composite layer by laser-MIG welding materials, welding ZL114A deeps up to 10mm, average joint tensile strength is 238 MPa, tensile strength is greater than 80% of the base metal. Double-layers laser-MIG welding method of welding, a simulation of a cylindrical pieces of aerospace products, forming a good weld, penetration up to 9 mm. With no crack, no incomplete penetration and lack of fusion, no visible inclusions, defects is mainly chain-like porosity, pore diameter less than 1mm, almost no distortion after welding. |
| Key words: laser-MIG hybrid welding double-layers welding thick aluminum alloy |
