EFFECTS OF PHASE COMPOSITION OF POWDERS ON THE MICROSTRUCTURE AND PROPERTIES OF (Ti,W,Ta,Mo)(C,N)-(Co,Ni) CERMETS INCLUDING LESS AMOUNT OF Mo

(Ti,W,Ta,Mo)(C,N)-(Co,Ni) cermets of less amount of Mo were produced using the self-made pre-alloyed solid solution powders of carbides or/and nitrides. Effects of phase composition of powders on the microstructure and properties were studied. The results suggest that the good corresponding relationships between the lattice constant of the pre-alloyed solid solution powders and the solid solution extent of elements are obtained. The addition of the pre-alloyed solid solution powders including the heavy metal elements of Ta and W is favorable to the spreading of heavy metal elements in the binders. The dissolution of Ti(C,N) reduces. The performance of cerments is improved. The cermets have the monolayer core-rim structure. The content of hard grains of wealthy Ti reduces and the content of hard grains of wealthy Ta and W increases. The grains of cerments are fine. The features of aggregation are not observed.