STUDY OF TRIBOLOGICAL CHARACTERISTICS OF PROTECTIVE ANTICORROSIVE MoCrN COATINGS

Experimental works aimed at studying tribological characteristics of MoCrN coatings have been carried out. Interest in such studies is primarily due to the prospect of using such coatings as anticorrosive protective coatings with high resistance to external mechanical effects, allowing to increase the resistance of steel to degradation processes during operation and high temperatures at which oxidation and amorphization processes are accelerated. The selection of optimal compositions of protective coatings allows to reduce wear resistance and degradation of near-surface layers of steel structures, as well as to increase their resistance to mechanical damage during friction. It is determined that the change of conditions of magnetron sputtering of MoCrN coatings, leading to a change in the ratio of elements in the composition of coatings, leads to the formation of structurally-ordered coatings, which in turn has a good correlation with the results of hardening and increasing resistance to wear. According to the obtained data, the change in the ratio of components, and as a consequence, the change in the ratio of crystalline and amorphous components in the composition of coatings leads to a decrease in the rate of wear, which indicates an increase in the resistance of coatings to external mechanical influences. The test results of coating samples in the case of assessing the resistance of coatings to temperature effects in the process of tribological tests showed an increase in the resistance of coatings due to the variability of changes in the elemental composition and degree of crystallinity.