利用微剪切试验原理对ＦｅＣｒＮｉ 合金和ＦｅＣｒＮｉ＋ Ｎ 包ＭＳ２ 激光熔覆层、熔覆层与基材交界处以及热影响区进行了微剪切试验。结果表明：熔覆层的剪切强度大小依熔覆合金成分而定；熔覆层与基材交界处的剪切强度比热影响区高，并比某些合金的熔覆层高。这说明，激光熔覆工艺中的熔覆层与基材交界处不是传统观念上的薄弱环节。 Micro-shearing test was carried out on the microstructure of FeCrNi alloy and FeCrNi + Npackage MS2 laser cladding, the interface between cladding layer and substrate and the heat affected zone by means of micro-shearing test. The results show that the shear strength of the cladding layer depends on the composition of the cladding alloy. The shear strength at the interface between the cladding layer and the substrate is higher than that of the HAZ and higher than that of some alloys. This shows that the laser cladding process cladding layer and the substrate junction is not the traditional concept of weak links.