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Information × Registration Number 0225U002121, (0123U101184) , R & D reports Title Development of technologies for obtaining welded joints with improved service properties and extending the service life of particularly important parts of modern gas turbine engines made from high temperature strength nickel alloys popup.stage_title Розробка принципових технологій отримання зварних з’єднань біметалевого колеса з різнорідних нікелевих жароміцних сплавів та відновлення структури та механічних властивостей деталі типу диск з деформованого нікелевого жароміцного сплаву ЭП-742 Head Krivtsun Ihor V., Доктор технічних наук Registration Date 19-02-2025 Organization E. O. Paton Elektric Welding Institute National Academy of scinces of Ukraine popup.description1 Develop basic technologies for welding the turbine bimetallic wheel of the "disc + high temperature strength nickel alloy" system and to restore the structure and mechanical properties by thermovacuum heat treatment of the turbine discs of modern gas turbine engines. popup.description2  Peculiarities of the microstructure change were studied and the complex of mechanical properties was evaluated at 20 and 650 °С (short-term, creep strength (650°С), impact bending (20°С), fatigue crack growth rate, determination of the characteristics of crack resistance (fracture toughness) at static load) of the material of the high-pressure turbine disk of the AL-31F engine made of nickel superalloy EP 742-ID with a approximately 770 hour service life. It was established that the characteristics of impact toughness, short-term and creep strength, as well as the characteristics of cyclic durability, of the metal of the disk mostly meets the strength requirements regulated in the Technical Conditions and Certificate for the EP 742-ID alloy. The effectiveness of the application of its restoration vacuum heat treatment according to the current technology of their recovery was checked. The obtained results will contribute to the determination of the possibility and conditions of increasing the installed resource by more than 15% of the high-pressure turbine disks of the AL-31F engines. The principle technology of butt argon arc welding of a bimetallic turbine wheel "disc (Inconel 718, EI 698) + cast blade (type ZhS6 and type ZhS32) high temperature strength alloys" with a weld made of Inconel 718 alloy 5 and 10,5 mm thick was developed and tested. That principle technology is based on preliminary facing of the butt weld joint edge from the side of the cast high temperature strength blades alloy by the method of microplasma powder surfacing with a plastic deposited material. The modes of heat treatment of such a welded joint are selected. Evaluation of short-term (20°С, 550°С) and creep (550°С) strength indicators on samples cut from butt-welded joints with a thickness of 5 and 10.5 mm proved that they meet the requirements of the Technical Task of SE "ZMKB "Progress" named Academician O.G. Ivchenko Product Description popup.authors Volosatov Ivan R. Hakh Ihor S. Zviahintseva Hanna V. Kiekukh Yurii O. Kovalchuk Serhii S. Kushnarova Tetiana M. Lysyuchenko Petro P. Mazurak Vasyl Ye. Nakonechnyi Oleksandr O. Nesina Iryna V. Nykytenko Yurii O. Oliynyk Yurii V. Pestov Valerii A. Pats Oleksandr I. Petrov Denys A. Starovirova Natalia H. Fomakin Oleksandr O. Khrushchov Heorhii D. Cherviakov Mykola O. Cherviakova Liudmyla V. Yarovytsyn Oleksandr V. popup.nrat_date 2025-02-19 Close