TASK FULFILLMENT RESULTS UNDER THE SUBPROGRAM “METALLURGY” OF THE STATE PROGRAM “MECHANICS, METALLURGY, DIAGNOSTICS IN MECHANICAL ENGINEERING” FOR 2021–2025, COMPLETED IN 2023

The main results of the research works are given which were carried out by the organizations of the National Academy of Sciences of Belarus and the Ministry of Education of the Republic of Belarus within the framework of the subprogram “Metallurgy”, completed in 2023. The most promising directions are defined, on the basis of which the tasks of scientific research within the framework of the subprogram “Metallurgy”, formed for 2025–2030, can be formed. The technological requirements and methods of ring billet manufacturing developed by the Joint Institute of Mechanical Engineering of the NAS of Belarus are presented which are applicable to the conditions of automated production. The results of this development are intended for use at the automated ring rolling complex being created in the Republic of Belarus as part of OJSC “BELAZ” – Management Company of Holding “BELAZ-HOLDING”. The Joint Institute of Mechanical Engineering of the NAS of Belarus developed a scientific methodology to improve the reliability and service life of cemented and nitrided parts, as well as cast elements of bearing structures of machine. The methodology consists in ensuring structural and mechanical homogeneity of the boundary volumes of grains of steel material at the stages of microalloying, crystallization and chemical-thermal treatment. On its basis new structural cemented and nitrided steels 20ХН3МА (20KhN3MA) and 40ХМФА (40KhMFA), as well as casting steel 15НМФЛ (15NMFL) were developed. The Belarusian National Technical University were analyzed typical body parts for manufacturing of electric means of transport. Recommendations are developed for making changes in the design in order to ensure their manufacturing by casting methods. Technological principles were developed for obtaining cast iron with spheroidal graphite of high grades using copper-magnesium ligature.