在熔焊异种可热处理强化和不可热处理强化铝合金过程中,面临许多与凝固相关的问题。采用搅拌摩擦焊接可以解决这些问题,从而可以综合利用两种铝合金的优异性能。研究搅拌摩擦焊同种和异种AA6061和AA5086焊接接头的显微组织和拉伸性能。采用光学显微镜和扫描电子显微镜观察分析不同区域的显微组织,测量焊接接头不同部位的显微硬度,评价焊接接头的拉伸性能,并研究其与显微组织和显微硬度之间的关联。研究发现,异种焊接接头的最大维氏硬度为HV 115,焊接效率为56%。这主要是由于获得无缺陷的搅拌区和晶粒增强作用。 In welding dissimilar heat-treatable heat-strengthened and non-heat-treatable aluminum alloys, many problems associated with solidification are faced. The use of friction stir welding can solve these problems, which can take full advantage of the excellent performance of the two aluminum alloys. Study the microstructure and tensile properties of the FS6061 and AA5086 welded joints of friction and friction stir welding. The microstructures of different regions were observed by optical microscope and scanning electron microscope. The microhardness of different parts of the welded joint was measured. The tensile properties of the welded joint were evaluated. The correlation between the microstructure and the microhardness was also studied. The study found that the maximum Vickers hardness of dissimilar welded joints HV 115, welding efficiency of 56%. This is mainly due to the availability of a flawless mixing zone and grain strengthening.