The wear resistance of WC particulate reinforced bearing steel composites prepared by electroslag smelting and casting was studied. The results showed that solution of WC phase into steel matrix and compound carbide along the grain boundary occur. The bonded strength of the interface was improved greatly due to the metallurgical bond in the interface

in which there exits a transitional zone in micro concentration of alloying element. Fatigue crack was firstly originated from the hard particulate suffered higher stress resulting in hard brittle phase drop and aggravating wear.The whole process revealed the comprehensive effect of both fatigue wear and abrasive wear.