THERMODYNAMIC MODELING OF OBTAINING WEAR-RESISTANT COATINGS USING COMPOSITE POWDER CHARGES

Abstract

Abstract. The article provides an overview and analysis of obtaining wear-resistant coatings for parts working in aggressive environments of metallurgical production. The solution of these problems is associated with the hardening of the surface layers of products. Their role in the durability of machines and mechanisms has especially increased at the present time, since the development of most industries is associated with an increase in loads, temperatures, and the aggressiveness of the environments in which the part operates. The titanizing process is an effective method of increasing the reliability and durability of machine parts, tools and technological equipment due to the creation of titanized layers on the surface of the machined parts, which have a unique set of physical and chemical properties. The results of thermodynamic modeling for the production of wear-resistant titanium-based coatings for the determination of rational composite powder charges are presented. The use of thermodynamic modeling makes it possible to quantitatively model and predict the composition and properties of complex heterogeneous, multi-element, multi-phase systems in a wide range of temperatures and pressures, considering chemical and phase transformations. The results of research on wear resistance revealed that, when tested under friction-sliding conditions, the best wear resistance among the considered alloyed titanium coatings was achieved by coatings alloyed with chromium and silicon. Their wear resistance is 1.7-1.9 times higher than that of coatings obtained under isothermal conditions.