Search academic texts

Information × Registration Number 0217U000485, 0114U006076 , R & D reports Title Research-and-development of триботехнічних properties fundamental mechanism of friction of materials is with a nanostructural matrix. popup.stage_title Head Kindrachuk Miroslav, Registration Date 07-02-2017 Organization National Aviation Univercity popup.description2 The analytical model of diffusion flows of matter from the middle of the material to surface frictionwas elaborated. An analytical model of atomic force mechanism grinding in conjugated friction surfaces was developed. The complex method for determining the tribological characteristics hugh chromium cast iron in a wide range of pressures and temperatures was done. It was constructed an evolutionary model of tribologicalsystem. It was developed a fundamental mechanism of wear of high chromium cast iron and low alloyed alloys. Methodological recommendations to improve the wear resistance of the nanostructured material with bainitic matrix. The optimum in terms of durability heat treatment mode of high chromium cast iron 2,8C-32Cr-3Ni-V and low alloyed chromium-manganese cast irons. The aim is to establish the influence of chemical and phase state and heat treatment on the wear resistance of high chromium iron alloy and low alloyed chromium-manganese cast irons. Investigation object is a heat-resistant alloys and high-chromium cast iron containing 16-30% chromium in cast state and after various heat treatment; processes developed in the friction tribological heterogeneous systems, the mechanism of wear. The subject of research is the mechanisms and models of structural phase transitions in functional materials with bainiticnanostructured matrix; regularities of structural - phase state, stress - strained state, physical - mechanical properties and tribotechnical characteristics of developed materials. Research methods. The study was conducted using experimental high chromium iron alloy cast iron and economically. Tribological study conducted in conditions of abrasive wear in environment of three abrasives, friction-tests via modernized installation 2070-SMT1; micro hardness measurements, metallography, topography of friction surfaces, X-ray, microanalysis, raster and scanning microscopy. Scientific novelty of the results. 1. created analytical models of evolutionary and stationary processes, their characteristics and the methods of their evaluation; 2. The fundamental mechanism of wear of nanostructured materials, and based on it reasonable composition, structure and heat treatment Sparingly high-temperature wear resistant cast iron and alloys; 3. Methodological recommendations on improving the durability tribosystemof low alloyed chromium-manganese cast irons with bainiticnanostructured matrix. The practical value of the results are the following: 1. Novel wear resistant iron based materials with nanostructured bainitic matrix that in wear resistance comparable with the 57Ni-Cralloy, and can be used to make metallurgical equipment. 2. A heat treatment for high chromium alloy cast iron and low alloyed chromium-manganese cast irons in order to obtain the highest durability was elaborated. The development can be used in enterprises of the Ministry of Industrial Policy of Ukraine. In particular, enterprises that used in the manufacture Rolling and Forging equipment for production of rolled metal, forged and stamped products, wires and extruded products. Existing results of application: development implemented at SE "PA Yuzhny Machine-Building Plant. O.M. Makarov ", which compiled the act (№ 278 / 7з of 08.12.2016y.). Product Description popup.authors Васютинська Ю.М. Веліканова Т.А. Данілов А. П. Кіндрачук М.В. Кузняк А.К. Недоводєєв В.Т. Тісов О.В. Федорчук С.В. Хімко М.С. Харченко В.В. Шевченко О.Л. Юрченко О.І. popup.nrat_date 2020-04-02 Close