【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.更多还原

【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.更多还原