Registration Number
0226U004072,
(0125U003573)
, R & D reports
Title
Research into the influence of chemical composition and surface and bulk heat treatment technology on the structure and properties of alloys for various purposes.
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Дослідження впливу хімічного складу і технології поверхневої та об'ємної термічної обробки на структуру і властивості сплавів різного призначення
Head
Oliinyk Inna M., Кандидат технічних наук
Registration Date
27-06-2026
Organization
State Higher Educational Institution "Azov State Technical University"
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Іmproving the mechanical and operational properties of alloys for various purposes by optimizing the composition and technology of surface and bulk heat treatment.
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The object of the study is sheet steel S690QL, hard alloys based on WC-Co and TiC-WC-Co, cemented steels. The purpose of the work is to improve the mechanical and operational properties of steels and hard alloys through surface and bulk heat treatments. Research methods are microscopic, testing of mechanical properties. A heat treatment is proposed that eliminates the stage of furnace hardening in the production of high-strength steel sheets with a thickness of 20 mm. This processing route provided mechanical properties that fully correspond to the S690QL grade according to EN 10025-6:2004. It has been established that plasma surface nanostructuring leads to a simultaneous increase in hardness and crack resistance, which is due to the formation of an ultra-dispersed carbide framework with residual compressive stresses and, as a result, a qualitative change in the micromechanism of crack propagation. It has been established that to improve the operational properties of cemented steels, it is necessary to use the effect of self-hardening under load, for this purpose, austenite should be obtained in the structure of the surface layer, capable of transforming into martensite under load. The amount of austenite, the degree of its strengthening and stability should be regulated by processing in relation to specific loading conditions, taking into account the initial chemical and phase compositions of the steels obtained after СТT.
Product Description
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Efremenko Vasyl Н.
Samotuhina Yuliia S.
Inna M. Oliinyk
Stavrovska Vira Ye.
Burova Dariia V.
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2026-06-27
