▎ 摘　　要

Aiming to reduce the friction coefficient of WC-Co coating, the grapheme oxide (GO) and WC-Co spraying powder were uniformly mixed by wet milling. The GO modified WC-Co coating was prepared by detonation gun spraying. The existence of GO, microstructure and chemical composition of the coating were analyzed by XRD, SEM and EDS instrument. Mechanical and wear properties of the coating were studied by micro-hardness tester, universal tensile machine and wear testing machine. The results show that laminar GO exists in the GO modified WC-Co coating. The coating has the dense and uniform structure. The adhesive strength and micro-hardness of the coating is 82 MPa and 10062 MPa, respectively. The friction coefficient of the GO modified WC-Co coating is decreased by 30% compared with that of the WC-Co coating. The addition of GO highly improves the wear resistance of the WC-Co coating.