In this paper, the lap joint of H62 copper alloy was carried out by pulsed laser welding. The effects of different powder interlayers on the microstructure, shear properties and corrosion properties of H62 copper alloy lap joints were studied. The results show that the welding joints with proper powder interlayer have achieved good welding forming. There are no defects such as pore and crack in the welding joints. The welding joints are fully penetrated with different powder interlayers except Ni powder interlayer. The grain size of weld is smaller than that of base metal. The maximum polar density of base metal is 6.46 in (001) [0–10] cubic texture, and there are two weaker (112) [111] Cu textures and (111) [1–21] textures. The maximum polar density of the weld is 5.39. The maximum position deflects, and (001) [0–10] cubic texture disappears. The weld is confused compared with the base metal, and the grain distribution is basically of random orientation. The addition of Zn powder reduces the welding stress. The shear strength of welding joints with Zn powder interlayer is the best, 82.27 MPa, which is 18% higher than that of welding joints without powder. The corrosion resistance of welding joints with different powder interlayers is as follows: no addition > Ni Powder > Zn Powder > Sn powder.

本文采用脉冲激光焊接技术对H62铜合金进行搭接。研究了不同粉末夹层对H62铜合金搭接接头组织，剪切性能和腐蚀性能的影响。结果表明，具有合适的粉末夹层的焊接接头实现了良好的焊接成形。焊接接头无任何缺陷，如气孔和裂纹。除镍粉夹层外，其他不同的粉夹层都完全熔透了焊接接头。焊缝的晶粒尺寸小于母材的晶粒尺寸。基本金属的最大极性密度为（001）[0-10]立方织构中的6.46，并且有两个较弱的（112）[111] Cu织构和（111）[1-21]织构。焊缝的最大极性密度为5.39。最大位置发生偏移，并且（001）[0-10]立方纹理消失。与母材相比，焊缝很混乱，晶粒分布基本上是随机取向的。锌粉的添加降低了焊接应力。带有锌粉夹层的焊接接头的剪切强度最高，为82.27 MPa，比不带粉尘的焊接接头的剪切强度高18％。不同粉末夹层的焊接接头的耐腐蚀性如下：不添加>镍粉>锌粉>锡粉。