Kondrat A. Improving of the wear resistance of high-speed steel tools through film coatings with different adhesive properties

Object of study-process machining tools of high speed steel with film coatings. The purpose of research, identify opportunities for improving the durability of tools from high speed steel by coating with different adhesive properties. Methods: A study based on the theory of cutting, maintenance tools and manufacturing engineering. Specifications of coatings investigated by: trybometra (relative adhesion activity of films) device to determine the strength of clutch cover with the base by applying scratches. Theoretical and practical results: the role of land "elastic" and "plastic" contact in the mechanism of the coatings on the cutting process and proposed a comprehensive scientifically based approach to selecting the optimal composition of the coating depends on the material, form processing and cutting modes and proposed multi-layer coating for handling iron materials the following composition: ZrN-TiN-NbN. Novelty: the first time proved that by changing the adhesion activity of contact surfaces of the tool to control the location and size of cell deterioration, found that the tool material showing property adhesion activity to the material only on the area of "elastic" contact, which determines the level of stress state on the site "plastic" contact, for the first time the conditions of efficient operation of high speed steel tools with coatings, and the conditions under which the use of inappropriate coatings. The degree of implementation: results used in the educational process in the departments of machine tools and tool engineering and technology Zaporizhzhya National Technical University in teaching lecture courses on subjects' Theory cutting "and" Manufacturing tools. " Scope of application -mechanical engineering companies.