Effect of TiC addition on the microstructure and wear resistance of induction brazed nickel-based coating in air

The nickel-based coating with different TiC addition was fabricated onto 45 steel substrate by using induction brazed technology in air. The effect of TiC addition on the microstructure and wear resistance of induction brazing coating was studied. The results show that the microstructure of brazing coating is strengthened and refined by adding TiC. With the increase of the amount of TiC added, the amount of TiC in the Ni-based matrix is increased, and the matrix structure is obviously refined. This is because the high melting point TiC particles can be used as heterogeneous nucleation cores, thus refining the Ni based matrix structure. Moreover, the wear resistance of brazing coating is improved due to the addition of TiC.