STUDY OF THE INFLUENCE OF HEATING DURATION DURING ELECTROLYTIC-PLASMA HARDENING ON THE CHARACTERISTICS OF 20GL STEEL

This article presents a comprehensive examination of the electrolytic-plasma hardening (EPH) process applied to 20GL structural steel, a material frequently used in the automotive, transport, and various other industries. The relevance behind this research lies in the necessity to enhance the performance of steels that face high mechanical loads, elevated temperatures, and corrosive environments. Experimental findings reveal that electrolytic-plasma treatment substantially increases the hardness of 20GL steel to approximately 600 HV on average. Additionally, prolonging the heating duration contributes significantly to greater hardness, playing a decisive role in bolstering wear resistance under load. Microstructural analysis confirms the formation of a fine-grained martensitic phase, highlighting the steel’s transformation and strengthening. Furthermore, the study emphasizes that the chemical composition of 20GL steel influences the hardness gradient from the surface inward and leads to the development of finer-grained features in the steel’s microstructure. Overall, the electrolytic-plasma process proves beneficial not only for improving mechanical attributes but also for enhancing reliability and service life of critical components. From an industrial standpoint, this technology is notable for its adaptability and cost-effectiveness, making it an attractive solution for sectors such as automotive manufacturing, construction, and the energy industry. Thus, electrolytic-plasma hardening emerges as a forward-looking method aligned with modern engineering demands, offering a promising avenue for advanced material optimization.

1. Tursunov N.K. Methodology for calculating the complex deoxidation of 20GL steel with aluminum and calcium / N.K. Tursunov, T.T. Urazbaev, T.M. Tursunov // Universum: Technical Sciences. – 2022. – № 2-2(95). – Р. 20-25.

2. Kulikov I. Electrolytic-plasma processing of materials / I. Kulikov, S. Vashchenko, A. Kamenev // Litres. – 2022. – Р. 191-219.

3. Volenko A.P. Electrolytic-plasma treatment of metallic materials / A.P. Volenko, O.V. Boychenko, N.V. Chirkunova // Vector of Science of Togliatti State University. – 2012. – № 4. – Р. 144-147.

4. Electrolytic-plasma processing and coating of metals and alloys / A.D. Pogrebnyak et al // Advances in Metal Physics. – 2005. 5. Tursunov N.K. Study of dephosphorization and desulfurization processes in the smelting of 20GL steel in an induction crucible furnace with further processing in a ladle using rare earth metals / N.K. Tursunov, A.E. Semin, E.A. Sanokulov // Ferrous Metals. – 2017. – № 1. – Р. 33-40.

5. Volenko A.P. Electrolytic-plasma treatment of metallic materials / A.P. Volenko, O.V. Boychenko, N.V. Chirkunova // Vector of Science of Togliatti State University. – 2012. – № 4. – Р. 144-147.

6. Pogrebnyak A.D. Electrolytic-plasma technology for coating and processing of metals and alloys / A.D. Pogrebnyak, A.Sh. Kaverina, M.K. Kylyshkanov // Physicochemistry of Surface and Protection of Materials. – 2014. – Vol. 50, № 1. – Р. 72-88.

7. Tyurin Yu.N. Features of electrolytic-plasma hardening / Yu.N. Tyurin // EPH. – 1999.

8. Structural transformation in 20GL steel after electrolytic-plasma surface quenching / B.K. Rakhadilov et al // Bulletin of the National Nuclear Center of the Republic of Kazakhstan. – 2018. – № 3. – Р. 99-102.

9. Influence of electrolytic-plasma hardening on the tribological properties of 40KHN steel / A.B. Kenesbekov et al // Bulletin of D. Serikbayev East Kazakhstan State Technical University. – 2018. – № 4. – Р. 144-151.

10. Influence of electrolytic-plasma surface hardening on the structure and properties of 40KHN steel / G.M. Toktarbayeva et al // Bulletin of D. Serikbayev East Kazakhstan State Technical University. – 2020. – № 1. – Р. 199-204.

11. The effect of electrolytic-plasma treatment of 18KHN3MA-Sh steel on surface microstructure and hardness / K.K. Kombaev, M.K. Kylyshkanov, Yu.I. Lopukhov // Journal of the Siberian Federal University. Engineering and Technology. – 2009. – Vol. 2, № 4. – Р. 394-399.

12. Cheylakh A.P. Influence of quenching modes on the structure and properties of cemented 20GL steel / A.P. Cheylakh, N.E. Karavaeva. – Р. 216.

13. Priupolin D.V. Investigation of the influence of the gradient structure in 20GL steel on its mechanical properties / D.V. Priupolin, A.V. Budruev // Vyksa Branch of NITU "MISIS", Vyksa; Collection of Materials of the VIII Regional Interuniversity Scientific and Practical Conference "Creativity of the Youth - to the Native Region". – Р. 67-71.

14. Cheylakh A.P. Influence of high-temperature thermocyclic treatment on the structure and properties of cemented 20GL steel / A.P. Cheylakh, N.E. Karavaeva // Interuniversity collection "Scientific Notes". Lutsk, 2015. – Issue № 50.

15. Satbayeva Z.A. Structure formation in alloyed steels during electrolytic-plasma surface hardening. pp. 6-7. (Manuscript, Ust-Kamenogorsk, 2022, Ph.D. dissertation).

16. Hardening and alloying of steel as a result of electrolytic-plasma treatment / A.D. Pogrebnyak et al. – 2003, Р. 76-78.

17. Modification of the surface of 30KhGSA steel using electrolytic-plasma thermocyclic hardening / B.K. Rakhadilov et al // New Materials and Technologies: Powder Metallurgy, Composite Materials, Protective Coatings, Welding. – 2022. – Р. 610-616.

18. Application of electrolytic-plasma hardening to improve the properties of machine parts made of 45 steel. Bulletin of Shakarim University / R.K. Kusainov et al // Technical Sciences Series. – 2024. – № 3(15). – Р. 62-70.

19. Changes in the mechanical characteristics of wheel steel after electrolytic-plasma surface hardening / B.K. Rakhadilov et al // Actual Problems of Strength. – 2020. – Р. 330-332.

20. Musikhin S.A. The influence of chemical heterogeneity of medium-carbon low-alloy steels on the formation of structure and a set of properties under thermal exposure (Doctoral dissertation, Candidate of Technical Sciences, specialty 05.16.01). – 2015.