STRUCTURAL AND PHASE STATES OF TiCN COATINGS SYNTHESIZED BY MECHANOCHEMICAL ALLOYING BEFORE AND AFTER HEAT TREATMENT

Abstract

This work is devoted to the study of changes in the structural and phase states of TiCN coatings on the surface of titanium synthesized by mechanical fusion. In the work influence of heat treatment on the structural-phase states and mechanical-tribological properties of coatings was studied. It is established that the mechanism of formation of TiCN coatings is conditioned mechanical cold welding due to the deformation compaction of powder particles on the surface of titanium under the influence of ball impacts. The influence of heat treatment on the structural and phase states of TiCN coatings is studied. It is shown that at temperatures of 600 °C and 900 °C for 2 h, the TiCN coating is thermally stable. Microhardness and wear resistance of coatings have been studied using methods microindentation and tribological tests. It was found that at 900 °C, the wear resistance and microhardness relative to the initial increases twice, while the adhesive strength of the coatings does not deteriorate.