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Information × Registration Number 0214U002256, 0113U002678 , R & D reports Title Development of steel with nitride dispersion strengthening and technology of its melting and heat treatment of railway wheels with increased resource exploitation. popup.stage_title Head -, Registration Date 27-01-2014 Organization Physico-technological institute of metals and alloys National academy of Sciences of Ukraine popup.description2 Purpose - to determine some of the key parameters , including optimal chemical composition of steel, thermokinetic parameters austenitizing and subsequent hardening , high-strength industrial wheels of steel with nitride dispersion strengthening , which will provide increased ( at least twice) operational durability and reliability wheels . Research method - passive and active experimentation. The work carried out: Defined methods, techniques and equipment for the study of the physical and mechanical properties of the steel wheel . Research melted steel and made them models for the study of the thermodynamic and kinetic conditions of phase redistribution and vanadium oxide phase by chemical analysis , thermal and kinetic parameters and polymorphic phase transformations dilatometer , metallographic and dyrometric methods of analysis , the study of micro-and substructure methods submicron topography surface quality elemental analysis of the surface of high-temperature X-ray , samples for determining the fatigue endurance , strength, and tensile and compressive , abrasion and wear resistance in contact- fatigue wear. It was established that the maximum efficiency of nitride dispersion strengthening wheel steel is achieved with an average content of vanadium level 0.20 mass frac. % and nitrogen - 0,020 mass frac. %, and guarantee high stability nitride dispersion strengthening effect of narrowing fluctuations of contents to 0.19 ... 0.21 mass frac. % for vanadium and 0,021 to 0,019 ... mass frac. % for nitrogen. To provide a narrow range of nitrogen in steel alloying with nitrogen should be performed alloy nitrided ferroalloys . Product Description popup.authors Бабаскін Юрій Захарович Довготелес Віталій Вікторович Золотар Ніна Яківна Короленко Валентина Петрівна Короленко Дмитро Миколайович Литвин Анатолій Тімофійович Радченко Зінаїда Миколаївна Степанова Тетяна Василівна Шипицин Петро Якович Шипицин Сергій Якович popup.nrat_date 2020-04-02 Close