Fabrication and interface property of WC-TiC-Co/Cr20 composites

The vacuum infiltration casting technique was adopted to prepare high-Cr white cast iron based composites with particle-reinforced wear resistant layer. The composition and phases of the interface were analyzed by means of XRD, EDX, etc. The WC-TiC-Co particles distribute uniformly in the composite layer of the material. The casting technique ensures metallurgical bonding of the interface between the high-Cr white cast iron and the particles. Owing to partial dissolution of the WC-TiC-Co particles and the interdiffusion of elements such as W, C, Ti, Co, Fe and Cr, compounds containing Fe, W and Co were formed in the interface region of composites. Finally, wear resistance of the composites was studied.