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Registration Number

0224U031986, 0123U104034 , R & D reports

Title

Increasing the complex of mechanical and operational properties of materials by optimizing the composition and technology of their production and strengthening

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Head

Oliinyk Inna M, Кандидат технічних наук

Registration Date

10-07-2024

Organization

State Higher Educational Institution "Azov State Technical University"

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 The object of research is semi-finished products and products made of polypropylene, structural and tool steels and cast iron, which were subjected to various methods of volume and surface strengthening. The purpose of the work is to improve the mechanical and operational properties of metallic and non-metallic materials by changing the chemical composition, volume and surface treatments. Research methods – microscopic (including electron microscopy), X-ray diffraction, testing of mechanical and operational properties, computer modeling using the JMatPro software, mathematical processing. The issue of effective methods of improving the quality of products made of structural and tool steels, cast irons, and polypropylene using the interrelationships between the chemical composition, structure, properties of materials and their application features was investigated and resolved. It was established that to improve the mechanical properties of polypropylene, it is recommended to use from 10 to 50 wt. % glass fiber. To improve the mechanical properties of TRIP-effect steel, it is important to use an alternative approach for choosing the intercritical annealing temperature. It is shown that with rational thermo-temporal modes of heating and holding in ІTI, quenching and tempering of structural steels allow obtaining an increased set of mechanical properties, while energy costs are reduced in comparison with typical heat treatment. Plasma surface treatment may be recommended instead of case hardening for carbon steel ground tool. This will provide a 3.5 ... 4.5 - fold increase in the hardness of steels compared to the normalized state and by 150 ... 200 HV compared to volume hardening.

Product Description

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Yefremenko Vasyl H.
Burova Dariia V.
Oliinyk Inna M.
Riabikina Maryna A.
Samotuhina Yuliia S.

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2024-07-10