Study on microstructure and abrasive wear properties of in-situ TiC reinforced high chromium cast iron matrix composite

Abstract

In this paper, the TiC particle-reinforced high chromium cast iron matrix composite was prepared in situ by the method of injection infiltration, and the effect of adding different volume fractions of moderators on the size of the reinforcing particles, the volume fraction of the reinforcing particles and the abrasive wear of the composite was systematically studied. Performance impact. The research results show that the TiC particles obtained by the in situ method are uniformly distributed in the matrix of high chromium cast iron, and the interface between the particles and the matrix is clean. And as the volume fraction of the moderator increases, the size of the obtained TiC particles becomes smaller and more uniform, and the volume fraction of the reinforcing particles also gradually decreases with the increase of the volume fraction of the moderator. And the introduction of TiC has increased the hardness of the material by up to 69.036%. Abrasive wear experiments show that the introduction of the moderator makes the reinforcing particles smaller, which further improves the wear resistance of the composite material, and the composite material with 20% moderator content has the best wear resistance, compared to The wear resistance of the metal matrix material is increased by 1.8 times.