Abstract:Ti(C, N) cermet possesses the properties of excellent wear resistance and high corrosion resistance,which has been widely used in cutting tools,moulds,sliding bearings and other wear-resistant parts.However,it is badly worn or even destroyed when serving as dry self-mated wear pairs in sliding bearings.In order to enhance the properties of excellent wear resistance and high corrosion resistance further,Ti (C, N)-based cermets with different additions of AlN were prepared by powder metallurgy method.The mechanical properties of TRS,HRA,relative density,wear properties.etc were tested.Microstructure of the species with different additions of AlN were investigated by optical scope,SEM,EDS.The results showed that the typical core-rim structure of cermets could be found when AlN was added,and with the increase of AlN,the inner rim became blurry,outer rim became thinner,the average grain size decreased,the porosity increased.In the range of 0 and 1.0%,with the increase of AlN，the relative density of Ti (C,N)-based cermets decreased,HRA and TRS increased slightly.The self-mated dry friction properties increased first and then decreased,and the best properties were achieved when the addition of AlN was 0.5%.The addition of AlN caused the effect of grain refinement strengthening.The Al solid solved in binder phase strengthened the binder phase.However,the cermets tended to lose N because of the addition of AlN，and the porosity increased，the relative density decreased.When the addition content was 0.5%,the rim phase in the cermets showed the proper thickness,the tendency of losing N was not serious,the porosity was small,the effect of grain refinement strengthening and the Al solid solved in binder phase strengthening the binder phase were dominant.The cermets showed the best friction properties.