Microstructure Analysis Of CuSnTi Active Brazing Filler Metal And Study Of Amorphous Brazing Brazing Diamond

Brazed diamond tools are widely used in the manufacturing of hard and brittle materials due to their features of high strength,easily diamond's exposure and have adequate of space to accommodate fragments.The production of the tools is highly dependent upon the performance of active brazing filler metal which are now mainly Ni,Ag or Cu-based.The Ni-based filler metal may easily cause diamond thermal damage due to its high melting temperature;the Ag-based filler metal has low degree of hardness,poor wear resistance and are very expensive.In this paper,Cu Sn Ti filler metal was thoroughly studied and analyzed in terms of its structure and propertie.The Cu Sn Ti amorphous filler metal was prepared.The key procedures and achievements here are as follows:(1)Active filler metals with different element content were prepared in line with the production requirements of diamond tools.A series of tests and analytics were carried out on the microstructure,phase,wettability,microhardness and shear strength of the brazed joints of different kinds of Cu Sn Ti active filler metal in terms of the melting temperature,wetting area,microhardness and shearing strength.The results have indicated that Cu Sn20Ti10 filler metal possesses excellent integrated performance.(2)Amorphous Cu Sn20Ti10 active brazing filler metal was prepared.Analysis methods were carried out on the thermo,phase,spreading property of crystalline and the amorphous filler metal and on the surface between brazing filler metal,diamond and steel matrix.The results have shown that the amorphous Cu Sn Ti filler metal has lower melting temperature,bigger wetting area,higher degree of hardness,better wear resistance and better bonding surface with graphite,diamond and steel matrix.