In order to solve the problem of seal failure caused by friction and wear of dry friction mechanical seal under high speed operating condition,the friction and wear properties of several typical friction pairs under dry friction were analyzed by experiments.Antimonydipped graphite M106D and resinimmersed graphite M106K were selected to pair with the hard ring of 38CrMoAlA and the 38CrMoAlA sprayed Cr2O3,Al2O3 respectively.Plint friction and wear tester was used to monitor the friction coefficient under the condition of high speed dry grinding.The effects of axial load and linear velocity on the friction coefficient were analyzed,and the morphology of the end face before and after the test was observed by white light interferometer.The results show that under dry friction,the sprayed 38CrMoAlA hard ring surface has less graphite transfer adhesion than the 38CrMoAlA hard ring,which is more wearresistant and has lower wear degree,and the wear degree of antimony graphite is less than that of resin graphite.The main wear form of six friction pairs is abrasive wear,and the friction coefficient of 38CrMoAlA sprayed Al2O3/antimonyimpregnated graphite friction pair is the smallest.Due to the selflubricity of graphite,it is beneficial to reduce the friction coefficient of the end face by proper increase of rotating speed and axial load.