Кафедра "Зварювання"

Постійне посилання колекціїhttps://repository.kpi.kharkov.ua/handle/KhPI-Press/5280

Офіційний сайт кафедри http://web.kpi.kharkov.ua/svarka

Кафедра "Зварювання" заснована у 2010 році професором Віталієм Володимировичом Дмитриком. Ініціював створення кафедри особисто академік Борис Євгенович Патон. Її створення зумовлене проханням провідних підприємств – флагманів економіки України: ОАО "Турбоатом", ОАО "Електроважмаш", ОАО Харківський турбінний завод, ГП завод ім. Малишева, ОАО Харківський авіаційний завод та ін.

Кафедра входить до складу Навчально-наукового інституту механічної інженерії і транспорту Національного технічного університету "Харківський політехнічний інститут".

У складі науково-педагогічного колективу кафедри працюють: 2 доктора технічних наук, 4 кандидата технічних наук; 2 співробітника мають звання професора, 3 – доцента.

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  • Ескіз
    Документ
    Composite material for surfacing, obtained by self-propagating high-temperature synthesis
    (Scientific and Technological Corporation "Institute for Single Crystals", 2023) Luzan, S. O.; Sytnykov, P. A.
    This paper presents the results of theoretical and experimental studies of the development of a composite material obtained by self-propagating high-temperature synthesis (SHS), which is used to modify a deposited alloy of the NiCrBSi system (self-flxing alloy PG-10N-01). The source components of the composite material are powders of titanium Ti, technical carbon C, aluminum powder Al, iron oxide Fe₂O₃, thermosetting powder PT-NA-01, and refractory clay PGOSA-0. The mechanical activation of the charge was performed in a ball mill for 15 minutes at 130 rpm and the ratio of the mass of the charge to the mass of the grinding media was 1:40. The SHS process was initiated by heating a nichrome spiral with a diameter of 0.8 mm in an argon Ar environment. As a result of deposition, the layers with a dense and multiphase structure are formed. The deposited layer of PG-10N-01 alloy consists of a solid solution of nickel (γ-Ni), boride phase Ni₃B and inclusions of chromium carbide Cr3C₂ and boron carbide B₄C. When the synthesized composite material was added to the PG-10N-01 alloy, titanium carbide TiC and silicon carbide SiC were additionally detected in the deposited layer, which lead to an increase in the layer microhardness. The phase composition of the layer deposited from a mechanical mixture of 10 % (Ti-C-Al-SiO₂-Al₂O₃-Fe₂O₃-PT-NA-01) + 90 % PG-10N-01 is a solid solution of γ-Ni nickel, nickel boride Ni₃B, titanium nitride TiN, chromium silicate CrSi, and intermetallic FeAl. The microhardness of this layer is 20 % lower than that of the PG-10N-01 alloy layer.
  • Ескіз
    Документ
    Structural-phase state and properties of sprayed plasma coatings based on self-fluxing alloy of NiCrBSi system with the addition of shs composites
    (Global Science Center LP, 2023) Sytnykov, P. A.
    he structural-phase state and mechanical properties of plasma coatings sprayed with a composite material based on a self-fluxing alloy of the PG-10N-01 NiCrBSi system modified with a composite material obtained using self-propagating high-temperature synthesis were studied.
  • Ескіз
    Документ
    Plasma coatings based on self-fluxing NiCrBSi alloy with improved wear resistance properties
    (Інститут проблем машинобудування ім. А. М. Підгорного НАН України, 2023) Sytnykov, P. A.
    The structure and properties of plasma coatings sprayed with a composite material based on a self-fluxing NiCrBSi alloy (PG-10N-01 alloy) modified with a composite material obtained by self-propagating high-temperature synthesis were studied. Titanium powders, carbon black, aluminum, iron oxide, PT-NA-01 thermosetting powder and PGOSA-0 refractory clay were used as the initial components of modified with a composite material. Mixing and mechanical activation of the initial powders was carried out in a BM-1 ball mill for 15 minutes at 130 rpm in a ratio of 1 to 40 of the mass of the charge to the mass of the falling bodies (steel balls with a diameter of 6 mm). Initiation of the self propagating high-temperature synthesis was carried out using a special device by introducing a heated nichrome spiral. The process of coatings spraying was performed on the MPN-004 microplasma spraying unit at a current of 45 A, a voltage of 30 V with a distance of 100 mm on samples made of 65G steel with a thickness of 3 mm. Argon was used as a plasmaforming and shielding gas. In order to substantiate the feasibility of the self-propagating high-temperature synthesis, a part of the samples was sprayed with a self-fluxing alloy PG-10N-01 with the addition of a mechanical mixture of starting powders. It was established that as a result of plasma spraying of the PG-10N-01 alloy and the composite material of the modified with a composite material + PG-10N-01 composition, coatings with a dense and multiphase structure are formed. The microstructure of the PG-10N-01 alloy coating consists of a solid solution based on nickel (γ-Ni) with inclusions of nickel borides Ni₃B and chromium carbides Cr₃C₂. When adding modified with a composite material in a nickelbased solid solution, in addition to the phases indicated above, borides of titanium TiB₂, carbides of titanium TiC and silicon SiC were detected. Their presence leads to an increase in the microhardness of such coatings and their greater wear resistance under conditions of abrasive wear in comparison with the spraying coating of the PG-10H-01 alloy.
  • Ескіз
    Документ
    Структура і триботехнічні властивості наплавлених композиційних покриттів на основі сплаву ПГ-10Н-01, що містять бор
    (2023) Лузан, Сергій Олексійович; Бантковський, Вячеслав Анатолійович