采用TIG焊工艺焊接LD10CS高强铝合金,通过金相组织观察、拉伸试验和硬度测试,研究分析了其焊接接头的组织与性能。结果表明,LD10CS高强铝合金TIG焊接接头由α-Al基体和析出的第二相所构成,其热影响区出现了过时效软化区,软化区的存在使得焊接工件的屈服强度、抗拉强度降低,但仍保持较好的塑性,接头断裂处为韧窝形式的韧性断裂。 The LD10CS high strength aluminum alloy was welded by TIG welding process. The microstructure and properties of the welded joints were studied through the microstructure observation, tensile test and hardness test. The results show that the TIG welded joint of LD10CS high strength aluminum alloy consists of α-Al matrix and precipitated second phase, and the over-aged softening zone appears in the heat-affected zone. The softening zone reduces the yield strength and tensile strength of the welded workpiece, , But still maintain a good plasticity, joint fracture at the toughness of the form of dimple fracture.