Перегляд за Автор "Kalinina, N. E."

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Implementation gas-plasma coatings based on nickel
(Харківський національний автомобільно-дорожній університет, 2022) Hlushkova, D. B.; Bagrov, V. A.; Demchenko, S. V.; Volchuk, V. M.; Kalinin, O. V.; Kalinina, N. E.; Глушкова, Д. Б.; Багров, В. А.; Демченко, С. В.; Волчук, В. М.; Калінін, О. В.; Калініна, Н. Є.
The development of modern technology requires a constant increase in reliability and durability of products.Widely used in the practice of domestic and foreign engineering coatings from electrolytic chromium for several hundred hours are triggered, they are unsatisfactorily working on friction and wear at high temperatures. The subject of the study were powder materials based on nickel PG-SR3 and PG-SR4. The work is devoted to the study of the formation of gasplasma coatings on parts of the cylinder-piston group of internal combustion engines using selffluxing powders based on nickel, as well as the structure and properties change after coating sputtering, its reflow,subsequent hardening. The purpose of this work is to study powder materials applied to the working surfaces of piston rings by gas-thermal spraying. The object of the study are processes of formation of the structure and properties of coatings from powder materials. The presence in the deposited layer of a solid solution based on nickel, carbide phase,borides of chromium and nickel, chromium silicides is established. The greatest macro- and microhardness is possessed by fused layers containing the greatest number of strengthening phases. The conducted researches and industrial tests allowed to introduce the coating into production.
Increasing the corrosion resistance of turbine
(Харківський національний автомобільно-дорожній університет, 2021) Hlushkova, D. B.; Bahrov, V. A.; Hrinchenko, O. D.; Stepanyuk, A. I.; Hnatiuk, A. A.; Kalinina, N. E.; Глушкова, Д. Б.; Багров, В. А.; Степанюк, А. І.; Гнатюк, А. А.; Гринченко, О. Д.; Калініна, Н. Є.
The reliability of the vane apparatus of steam turbines largely determines the operation of the turbine as a whole. The results of scientific research indicate that the surface operation of the blades in the wet - steam flow is caused by a combination of corrosion and drip erosion. The presence of chemical elements and compounds in the working fluid intensifies the process of blade wear. The pH value of the working environment, which can fluctuate significantly during operation, has a significant effect on the wear characteristics. The influence of methods of strengthening the leading edges of steam turbine blades made of steel is analyzed 15Х11МФ on corrosion resistance. Corrosion tests of blade samples were carried out, the inlet edges of which were strengthened in three ways: high current amplification, electrospark alloying with T15K6 alloy, electrospark alloying with steel 15Х11МФ According to the results of the tests, the layer strengthened by hardening by high-frequency currents has the lowest corrosion rate, the layer strengthened by electrospark alloying with T15K6 hard alloy has the highest. The corrosion rate of the layer reinforced by electrospark alloying of steel 15H11MF is 2.1 less than that of the layer reinforced with T15K6 alloy.
Influence of nanodispersed compositions on structure formation of high-strength aluminum alloys
(Харківський національний автомобільно-дорожній університет, 2020) Kalinina, N. E.; Hlushkova, D. B.; Voronkov, A. I.; Kalinin, A. V.; Stepanuk, A. I.; Voronova, E. M.; Serzhenko, I. O.; Калініна, Наталія Євграфівна; Калінін, Олександр Васильович; Глушкова, Діана Борисівна; Воронков, Олександр Іванович; Степанюк, Андрій Іванович; Воронова, Єлизавета Михайлівна; Серженко, Іванна Олегівна; Калинина, Наталия Евграфовна; Калинин, Александр Васильевич; Глушкова, Диана Борисовна; Воронков, Александр Иванович; Степанюк, Андрей Иванович; Воронова, Елизавета Михайловна; Серженко, Иванна Олеговна
An analytical review of the state of the problem of aluminum alloys modification was performed. The absence of a unified approach to solving the problem has been established, which is asso-ciated with the complexity of the process of modifying multicomponent alloys. The aluminum alloys of the AL-Zn-Mg-Cu system were studied. As a modifier, a composition based on nanodispersed powders of titanium and boron with fractions of up to 100 nm, obtained with plasma-chemical synthesis, is proposed. The structure, phase composition, and properties of the test samples were studied before and after modification with methods of optical microscopy, X-ray diffraction analysis, and X-ray spectral analysis. In the modified B95 and B96 alloys, grain refinement and structure stabilization were achieved. Determination of the crystal lattice parameters of the alloys showed an increase in the period of lattice of the modified samples by 1.02%. The microhardness of α-Al, the solid solution, was increased from 1080 to 1500 MPa. The phase composition of B95 and B96 alloys is represented with the intermetallic phases CuAl2, MgZn3, Mg2Zn3, Mg2Si, FeAl3, TiB2, TiAl3, as well as phases of complex composition. The maximum grain refinement and increase in the mechanical properties of the alloys were achieved upon modification of 0.05% Ti and 0.005% B, which is explained by the formation of dispersed strengthening intermetallic phases of complex composition in the center of the grains.
Нанотехнологія – ресурсозберігаючий спосіб одержання високоякісної продукції машинобудування
(Харківський національний автомобільно-дорожній університет, 2022) Калініна, Н. Є.; Цокур, Н. І.; Носова, Т. В.; Мороз, Я. В.; Kalinina, N. E.; Tsokur, N. I.; Nosova, T. V.; Moroz, Y. V.
Встановлено вплив модифікування дисперсними композиціями на струк- туру та механічні властивості деформованих алюмінієвих сплавів для листових заготовок у машинобудуванні. Досліджено алюмінієві сплави систем Al-Mg, Al-Mg-Sc. Модифікатором досліджуваних сплавів обрано нанодисперсну композицію на основі порошку карбіду кремнію SiC розміром часток 50...100 нм. Проведені промислові плавки сплавів АМг6, 1571, 1420. Розроблено технологічний процес виплавки при оптимальній кількості 0,2% модифікатора від маси розплаву. Встановлено взаємозв’язок зеренної структури модифікованих сплавів з підвищеним комплексом механічних властивостей.