№2(10) 2018

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https://eir.nuos.edu.ua/handle/123456789/3326

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Перегляд №2(10) 2018 за Ключові слова "combined deformation"

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    The increasing of the thermal stability of the crushed substructure of steels
    (2018) Dubovoy, A. M.; Makruha, T. O.; Chechel, O. V.; Дубовий, О. М.; Макруха, Т. О.; Чечель, О. В.
    The influence of the combined deformation on the thermal stability of the poligonization substructure of the technically clean iron and steels are shown in the article. So, the purpose of the work is the increasing of the thermal stability of the poligonization substructure by combined deformation of iron, steel 20, 45, У8, 12Х13 and 40Х. The possibility of the increasing hardness on the maximum indexes are investigated and installed the optimum magnitude and species of the deformation and modes, namely temperature and time of the exposure, of the heat treatment. The possibility of the thermal stability of the poligonization substructure during prerecrystallization heat treatment of the Fe and carbon and alloyed steels by using combined deformation is established. The decreasing of the sizes of the regions of the coherent scattering of the values of the physical and mechanical properties, such as hardness, is proved. Indexes of the quantities of nanoscale substructure elements and angle of orientation of the subgrains are calculated by methods of the harmonic analysis. The combined deformation allows the using this method for machine parts and appliances. It was shown that pre-crystallization thermal treatment allows to form a substructure with nanosized elements of size 80 nm (steel 45) in a combination of deformed steels, and their quantity can reach 75 % of the total number of structural components with a maximum angle of divergence of subgrains 2.16º (technically pure iron).