Search academic texts

Information × Registration Number 0223U000850, 0122U000776 , R & D reports Title Forming mechanisms and modeling of the structural steel of refractory slabs with predictive mechanical characteristics popup.stage_title Head Honcharov Oleksadr A., Доктор фізико-математичних наук Registration Date 20-01-2023 Organization Sumy State University popup.description2  Modification of surfaces that are in difficult operational conditions with high temperature, significant mechanical loads, aggressive environment and other local physical and chemical processes is effectively implemented by applying multilayer wear-resistant coatings based on nitrides, carbides and carbonitrides of refractory metals. The presence of such a protective coating on the surface leads to a radical change in the mechanics and physico-chemistry of the contact interaction of the affected objects. This is determined by the redistribution of stresses on the surfaces of the tool, the change in the coefficient of friction and, as a result, the cutting forces and temperature. The coating increases such important properties of the tool material as hardness, heat resistance, wear resistance, physico-chemical passivity in relation to the material being processed, has a favorable effect on contact processes and cutting parameters that determine the wear characteristics of the tool. Carbide and nitride multi-layer coatings are relevant. Such coatings provide high thermal stability at high cutting speeds and sufficient wear resistance of the tool. The complexity of processes in the "dynamic stress-strain" system is a problem of modeling thermodynamic processes in the area of metal machining with a coated tool. Such processes depend on the development of the microstructure of surfaces, often requiring data on microstructure, changes in grain size as a function of strain, strain rate and temperature, etc. Analysis of the influence of nanostructured nanocomposite multilayer coatings on heat transfer processes and the formation of deformation fields in the cutting tool depending on the structural state, and accordingly on the physical and mechanical characteristics of multilayer film coatings, is an urgent issue of surface engineering Product Description popup.authors Bilous Dmitro O. Badalyan Anna Yu. Honcharov Oleksadr A. Kolinko Ivan S. Kornich Hryhorii V. Levchinscii Anton V. Khomenko Oleksii V. Chernushchenko Roman R. Shyrokorad Dmytro V. popup.nrat_date 2023-01-20 Close