Browsing by Author "Perchun, Halyna"

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    Comparative Analysis of Technologies for the Production of Hardened Steel Products
    (Український державний університет науки і технологій; Університет Аалто Гельсінкі, Фінляндія, 2021) Perchun, Halyna
    ENG: Comparative analysis of the known technologies for manufacturing hardened steel products using the methods of heat hardening and the methods of thermomechanical hardening shows that the developed technology favourably differs from the others by using only one type of hardening – deformation, which gives better logistics and ecology due to exclusion of the technological operations of high-temperature heating and rapid cooling; reduces the price of the billet, since the cold deformation does not require alloying. In the known methods of hardening of steel products, the corresponding structural state is formed most often by the heat treatments leading to various phase and structural transformations. At the same time, during operation these products are subjected primarily to deformation effect. In the products manufactured by the new technology, their structural state is formed by the deformation effect, i.e. effect of the same type as during operation. This makes it possible to state that their operational reliability is higher, including under the cyclic loading.