Effect of Molybdenum Additions on the Microstructure and Properties of WC-W₂C Alloys

Abstract

The effect of doping additions of 5, 10, and 20 wt.% molybdenum on the structure, stress–strain state, phase composition, and size of phase components in WC–W₂C alloys is studied. It is found that 5 wt.% molybdenum leads to 30% increase in the microhardness and twofold to threefold increase in the wear resistance of relit compared to the undoped alloy. Higher molybdenum content of the WC–W₂C alloys changes the phase composition and increases compressive stresses in the W₂C matrix phase and tensile stresses in WC, (Mo, W)₂C and Mo₂C inclusions.