Preparation method of AgCuTi active brazing filler metal

The invention provides a preparation method of an AgCuTi active brazing filler metal. According to the method, the surface of Ti powder is coated with Ag, then the Ti powder is evenly mixed with AgCu alloy powder, the AgCuTi active brazing filler metal foil strip is prepared through the processes of sintering, rolling, heat treatment and the like, due to the fact that the surface of the Ti powder is coated with Ag, isolation of Ti and Cu is achieved, generation of CuTi compounds is reduced, the particle size of the CuTi compounds is smaller than 20 micrometers, and the CuTi compounds are distributed in a dispersed mode. According to the preparation method, the processing performance of the AgCuTi alloy is improved, micro-size processing can be carried out, meanwhile, the welding performance of the active brazing filler metal is improved, the method has the advantages of being high in processing efficiency, high in yield and the like, and a new technical approach is provided for manufacturing and production of