Engineering, Energy, Transport AIC

Ludmila Shvets – Ph.D., Associate Professor, Department of Agricultural Engineering and Technical Service Vinnytsia National Agrarian University (Sunny str., 3, Vinnytsia, Ukraine, 21008, e-mail:  shlv0505@i.ua, https://orcid.org/0000-0002-4364-0126).
Kateryna Chmykh – is a first-year Postgraduate at the Vinnytsia National Agrarian University (3 Sonyachna St., Vinnytsia, 21008, Ukraine, e-mail: catherina099@gmail.com, https://orcid.org/0000-0001-8873-4436).

Hot processing of metals by pressure has a number of positive qualities: the constituent parts of the metal are distributed more evenly than before processing; grain sizes decrease, which leads to improved mechanical properties; the metal becomes denser. Pressure-treated metals have a fibrous structure.
The hot working process is one of the types of metal forming processes and it takes place at temperatures higher than the recrystallization temperature. During hot deformation, the metal is also strengthened (hot defamation), but it is completely removed in the process of recrystallization. With it, the plasticity of the metal is higher, and the resistance to deformation is approximately 10 times lower than during cold deformation.
Most metals have a recrystallization temperature that is half or one-third of the melting temperature of the metal. Therefore, we can say that when the metal is plastically deformed above the recrystallization temperature, but below the burning point, this is a hot process of metal deformation.
Elastic and then plastic deformation occur under the influence of external forces on the material. Pressure treatment of metals is possible due to their plasticity. A sign of elastic deformation is its reversibility, that is, its disappearance after removal of the load. The physical essence of elastic deformation is explained by the slight relative displacement of atoms in the crystal lattice, which return to their previous positions after the load is removed.
There are such methods of hot processing as: hot rolling, hot forging, hot stamping, hot drawing.

[1]    Pulupec, M., Shvets, L. (2019). Characteristics and thermomechanical modes of aluminum alloys hot deformation. Current Problems of Transport: Proceedings of the 1st International Scientific Conference, Ternopil. Ternopil Ivan Puluj National Technical University and Scientific Publishing House «SciView». 195–204. [in English].
[2]    Shvets, L, Trukhanska, O. (2022). Experimental studies of technological parameters of rolling of samples from aluminum alloys during isothermal deform. Norwegian Journal of development of the International Science, 80. 61–76. [in English].
[3]    Shvets, L. (2021). Development of the device, restoration of places of landing bearings. Vibration in engineering and technology, 1 (100). 133–138. [in English].
[4]    Shvets, L. (2020). Extension value, with hot rolled aluminum alloy specimens, round section in smooth rollers. Monography. Scientific foundations of modern engineering. Boston (USA). 234–240. [in English].
[5]    Shvets, L. (2021). Restoration of body parts. Colloquium-journal, Poland, 8 (95). 44–53 DOI: 10.24412/2520-6990-2021-895-44-53. [in English].
[6]    Shvets, L. (2020). The essence and possibility of the method of isothermal deformation. Slovak international scientific journal, 1 (42). 16–24. [in English].
[7]    Aftandilyants, E.G., Zazymko, O.V., Pokhilenko, H.M. (2020). Tutorial. Technology of processing metals and alloys by pressure. NAU Publishing Center. [in Ukrainian].
[8]    Budyak, R.V., Posvyatenko, E.K., Shvets, L.V., Zhuchenko, G.A. (2020). Construction materials and technologies. Tutorial. Vinnytsia National Agrarian University. [in Ukrainian].
[9]    Popovych, V. (2010).  Technology of structural materials and materials science. Book I. Lviv. [in Ukrainian].
[10]    Popovych, V., Golubets, V. (2012). Technology of structural materials and materials science. Book II. Sumy. [in Ukrainian].
[11]    Skryabin, S.A., Gunko, I.V., Shvets, L.V. (2012). Rolling of billets from aluminum alloys under conditions of isothermal and deformation close to it: monogaphy. Vinnytsia: PP "Edelweiss and K". [in Ukrainian].