Study of the Craft and Properties on Cr/WC System Hardfacing Alloy with Flux-Cored Wire

A wear-proof Cr/WC system surfacing alloy with flux-cored wire was developed by using a carbon dioxide gas shielded welding method. The wear-resisting property of the surfacing alloy was studied by analyzing the average hardness, the abrasion weight loss and the microstructure of the surfacing layer. At the same time, the influence rule of the alloying element in the flux core such as Cr , WC, Mo and V on the hardness and wear resistance of the surfacing layer was discussed systematically. Thereby the optimum concentration of alloying element was confirmed. The results show that when the content of Cr chemical element as 5.5%~6.0%, the content of WC powder is 3.9%~4.2%, the content of Mo is 1.6%, and the content of V is limited in 3.2%, the matching of the Cr/WC surfacing alloy with flux-cored wire is suitable, and the hardness and wear resistance of the surfacing layer is preferable.