CBN-enhanced AgCuZr active brazing filler metal laser brazing layer and preparation method thereof

The invention relates to a CBN enhanced AgCuZr active brazing filler metal laser brazing layer and a preparation method of the CBN enhanced AgCuZr active brazing filler metal laser brazing layer. The CBN enhanced AgCuZr active brazing filler metal laser brazing layer is prepared from the following raw materials in percentage by mass: 65.0% of Ag, 25.0%-27.0% of Cu, 6.0%-4.0% of Zr and 4% of CBN. The brazing filler metal is good in wettability and high in connection strength, and can be used for laser brazing connection preparation of dissimilar metal materials, especially steel, titanium and other dissimilar materials. The CBN reinforced AgCuZr active brazing filler metal is well wetted and spread on a 45 # steel substrate, the surface of a brazing layer is smooth, and no obvious crack or ablation phenomenon appears on the surface of the brazing layer; a tensile test result shows that the connection strength is close to 300MPa. 本申请涉及一种CBN增强AgCuZr活性钎料激光钎焊层及其制备方法。该CBN增强AgCuZr活性钎料激光钎焊层按质量计由以下原料制成：Ag 65.0％、Cu 25.