The metallographic structure and composition proportion generate significant influences on the friction and wear behaviors of ironbase powder metallurgy.To the components composed of powder metallurgy in compressors,the friction tests in oil lubrication were carried out to investigate the effects of different densities and compositions.The friction coefficients were tested by a ringonring test rig,and the metallographic structure of basis material and wear topographies of friction surfaces were measured by metalloscope and scanning electron microscopy respectively.Results show that the different densities and compositions generate significant influences on fiction and wear behaviors of powder metallurgy.With the increase of applied loads,the influence of density change on friction coefficient presents different tendencies.The friction coefficient gradually increases with the increasing of density at 200 N,but gradually decreases at 400 N.While the applied load increases to 600 N,the influence of density change on friction coefficient decreases gradually and the samples with different densities have no obvious difference of friction coefficient.The increase of carbon content and copper content is beneficial to the decrease of friction coefficient,but the carbon content plays the main role.The coupling effect of carbon and copper can obtain the lowest friction coefficient,which can reduce the friction coefficient by 27.0%.