关键词: 铝合金, 激光封焊, 组件模块, 显微组织, 力学性能

Abstract: In the microwave component module, in order to prevent the collision, oxidation and accelerated aging of the bare chip after processing, it is necessary to cover the microwave component module to ensure good airtightness and performance. The 6061/4047 aluminum alloy is welded by laser sealing welding technology, and the welding seam samples are cut by wire electrical discharge machine. The microstructure of welding seam is analyzed by metallographic microscope, and the hardness of welding seam is measured by micro-hardness tester. The destructive tensile test is carried out by tensile testing machine, and the fracture morphology is observed by metallographic microscope. The results show that a good metallurgical layer is formed at the interface between the welding seam and 6061/4047 aluminum alloy, and the hardness of welding seam is lower than that of 6061/4047 aluminum alloy. The hardness is highest at the center of the welding seam, the tensile fracture is located on the side of 6061 aluminum alloy, and the fracture is a typical plastic fracture morphology.

Key words: aluminum alloy, laser sealing welding, component module, microstructure, mechanical performance