对新能源汽车用6082-T6铝合金进行了搅拌摩擦焊接。通过金相显微镜、透射电镜、扫描电镜、维氏硬度试验、拉伸试验系统研究了焊接接头的微观组织与力学性能。结果表明:焊核区发生动态再结晶,组织呈细小的等轴晶粒,晶内位错密度降低,第二相颗粒数量减小。虽然搅拌摩擦焊接头的强度有所下降,但能够满足铝合金车身力学性能要求。 6082-T6 aluminum alloy for new energy vehicles was friction stir welded. The microstructure and mechanical properties of welded joint were studied by metallographic microscope, transmission electron microscope, scanning electron microscopy, Vickers hardness test and tensile test system. The results show that the recrystallization occurs in the weld nugget zone with fine equiaxed grains and the dislocation density decreases and the number of second phase grains decreases. Although the friction stir welding head strength decreased, but to meet the mechanical properties of aluminum alloy body requirements.