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.