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Information × Registration Number 0223U000822, 0122U000875 , R & D reports Title Research of influence of segregation processes and features of structural transformations on technological strength of welded joints of new martensitic chromium steels and development of welding technology for the manufacture of power equipment of domestic thermal power plants and combined heat and power plants popup.stage_title Head Skulskyi Valentyn Yu., Доктор технічних наук Registration Date 20-01-2023 Organization E.O.Paton Elektric Welding Institute National Academy of scinces of Ukraine popup.description2  The goal of the work is the development of scientifically based physical and metallurgical principles for obtaining high-quality welded joints of rotor and boiler constructions from new complex-alloyed martensitic steels with 9...12 % Cr for supercritical power units of thermal power plants and combined heat and power plants. As a result of the research, it was established that during automatic flux welding of new martensitic chromium steels, the welds of the 0.1С-9Cr-Mo(Mo+W)-NbV alloying system are prone to crystallization and tempering cracks. Experimentally, it has been shown that the sensitivity to the formation of cracks is manifested when the silicon content in chrome-alloyed welds increases by more than ~0.3% for the welding of rotating elements of new steels with 9...12% Сr. Based on a comparative assessment of the welding and technological properties of fluxes for welding high-chromium and high-alloy steels, a study of the influence of flux/wire combinations on the composition of the weld metal and their technological strength, it is shown that the SFT flux, which provides high purity of the deposited metal with respect to the presence of gases, harmful impurities, does not affect its chemical composition and does not lead to an increase in its silicon content. The result is resistance of welds against hot and reheating cracks. Product Description popup.authors Yelagin Valery P Yeremeyeva Lyubov Ivanenko Tetyana Alekseenko Tetyana Aleksandrovna Andriychuk Yevheniya Berdnikova Olena M. Gavrik Andriy R Grigorenko Svetlana Zakharov Leonid S Kapitanchuk Leonid Kasatkin Oleg G. Kozlova Kseniya Kushnareva Olga Sergeevna Moravetsky Sergii I Nimko Maksym O Osipenko Iryna H Pashynsʹka Olena Polovetskiy Evgeniy Viktorovich Skulskyi Valentyn Yu. Tur Lyudmyla V Tsaruk Anatoly K Chorna Tetyana I popup.nrat_date 2023-01-20 Close