Abstract:WC-WB-CoCr coatings were prepared by high velocity oxy-fuel spraying (HVOF), and the effect of temperature on the frictional wear properties of WC-WB-CoCr coatings was investigated. The microstructure and mechanical properties of the coatings were characterized by scanning electron microscopy, X-ray diffraction and microhardness tester. The high-temperature tribological properties and oxidation products of WC-WB-CoCr coatings were investigated by friction and wear testing machine and Raman spectroscopy, and the abrasion scar morphology was scanned and the wear rate of WC-WB-CoCr coatings was calculated by a surface profiler. The results showed that the WC-WB-Co-Cr coating mainly consisted of WC and CoW2B2, and the coating structure was dense and tightly bonded to the substrate. The friction coefficient of the coating decreased from 0.66 to 0.57 as the temperature of the wear test increased, and the wear rate of the coating increased with the increase of temperature, but the growth rate of its wear rate decreased with the increase of temperature. During high temperature wear, the oxide film on the surface of the wear marks mainly consisted of WO3 and CoWO4, and CoWO4 showed better high temperature wear resistance than WO3. The main wear mechanisms of the coating are fatigue wear and adhesive wear.