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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Документ Composite material, obtained using by self-propagating high-temperature synthesis(Ukrainian Nuclear Society National Science Center "Kharkiv Institute of Physics and Technology" NAS of Ukraine, 2024) Sytnykov, P. A.; Luzan, S. A.Документ Study of the structure and properties of deposited layers of NiCrBSi alloy, modified with composite material(Slovenian Research and Innovation Agency, 2023) Sytnykov, P. A.The structure and properties of deposited layers with a self-fluxing PG-10N-01 alloy of the NiCrBSi system, which is modified with composite material obtained by selfpropagating high-temperature synthesis, were studied. Powders of titanium, technical carbon, refractory clay, aluminum, iron oxide, and PT-NA-01 thermosetting powder are used as the initial components of the modifying composite material. The powders were mechanically activated in a ball mill, pressed into a cylindrical sample, and then subjected to the process of self-propagating high-temperature synthesis. The deposition of the samples was carried out with a non-fusible graphite electrode with a diameter of 9.5 mm, at a current of 110 A, using an inverter power source SV-290NK. It was established that the structure of the layer deposited with the PG-10N-01 alloy consists of a solid solution based on nickel (γ-Ni) and a eutectic formed on its basis with Ni₃B boride. Single inclusions of carbides of chromium Cr3C₂ and boron B₄C were also detected in the deposited layer. When adding a modifying composite material to the PG-10N-01 alloy, the structure of the deposited layer consists of γ-hard solution and eutectics, strengthened by carbides of titanium TiC and silicon SiC, which increase the microhardness and wear resistance of the layer. The microhardness of the layer deposited with the composite material, which contained 10% of the modifying component, is 660 HV, which exceeds the microhardness of the layer deposited with the PG-10N-01 alloy, which is equal to 510 HV. Based on the results of the research, operational tests of the set of duckfoot blades of the KPP-8 semi-trailer cultivator, aggregated with the New Holland T 6090 tractor, were carried out in the conditions of the Kamianuvatka farm (Novoukrainka district, Kirovohrad region). Based on the tests, it was proved that the relative wear resistance of duckfoot blades made of 65G steel, strengthened on the reverse side according to the "toe-working blade" scheme by depositing a layer of composite material is 1.7 times greater compared to the wear resistance of blades made by standard technology logic.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.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.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.Документ Device for initiating the SHS process(2023) Luzan, S. A.; Sytnykov, P. A.The structure and operating principle of a special device for initiating the SHS process are described. The device consists of a tripod with a sample placement table, a movable dielectric clamp with a glowing filament, and a power transformer.