本文对 LD2铝合金钎焊接头,用扫描电镜、俄歇能谱仪进行了微区成份分析,以揭示钎缝中主要缺陷的特点及形成过程。并有针对性的进行了验证性试验。钎剂钎焊缝中主要缺陷为钎剂夹渣,其形貌为“泥纹”状和小白块、云状物等,并对泥纹状夹渣的形成过程进行了探讨。真空钎焊缝中主要缺陷为未钎透,并对条状未钎透和网状未钎透进行了分析。 In this paper, LD2 aluminum alloy brazed joints, the use of scanning electron microscopy, Auger spectroscopy micro-component analysis to reveal the main characteristics of brazing seam defects and the formation process. And targeted test conducted a confirmatory. The main defect in flux brazing seam is flux inclusion, its morphology is “mud pattern” and small white blocks, clouds and the like, and the formation process of mud striated slag is discussed. The main defect in the vacuum brazing seam is un-brazed, and the unbonded and non-brazed bars are analyzed.