DOI: 10.52150/2522-9117-2023-37-211-219

Golub Tetiana Serhiivna, Ph. D. (Tech.), Senior Researcher, Iron and Steel Institute of Z. I. Nekrasov National Academy of Sciences of Ukraine, Academican Starodubova Square, 1, Dnipro, 49107, Ukraine. ORCID: 0000-0001-9269-2953. E-mail: dove@email.ua

Molchanov Lavr Serhiiovych, Ph. D. (Tech.), Head of Department, Senior Researcher, Iron and Steel Institute of Z. I. Nekrasov National Academy of Sciences of Ukraine, Academican Starodubova Square, 1, Dnipro, 49107, Ukraine. ORCID: 0000-0001-6139-5956. E-mail: metall729321@gmail.com

Semykin Serhii Ivanovych, Ph. D. (Tech.), Senior Researcher, Iron and Steel Institute of Z. I. Nekrasov National Academy of Sciences of Ukraine, Academican Starodubova Square, 1, Dnipro, 49107, Ukraine. ORCID: 0000-0002-7365-2259. E-mail: isisemykin@gmail.com

Prokopenko Pavlo Hryhorovych, Chief Metrologist, Iron and Steel Institute of Z. I. Nekrasov National Academy of Sciences of Ukraine, Academican Starodubova Square, 1, Dnipro, 49107, Ukraine. E-mail: ogm-ichm@ukr.net

ESTABLISHMENT OF RATIONAL MODES OF INTERACTION OF GAS FLOW AND ELECTRIC DISCHARGE FOR THE DEVELOPMENT OF THE GASEOUS NITROGEN ALLOYING METHOD USING ELECTRICAL ACTIVATION

Abstract. Today, the metallurgical industry, as the main producer of structural material, sets new, increased requirements for the operational qualities of steels, which determine the reliability and durability of parts and structures. The methods of improving the properties of steels are quite diverse, but an important place among them is alloying, including nitrogen. The nitrogen alloying allows to reduce the content of more valuable elements in alloys while maintaining the necessary strong structure and high corrosion characteristics of alloys, plasticity, etc. Nitrogen is a fairly widespread chemical element and has long been known as an alloying agent, but its limited solubility in iron alloys, especially with a high content of other components, prevents its widespread use. Different methods of gas activation are used to increase the solubility of nitrogen. The authors investigated the option of activation by creating an electric discharge on a physical stand. The area of the lance at the outlet for the supply of purging gas was subject to modeling, on the path of which a gas activation device was placed by creating an electric discharge between the electrodes. It was established that to ensure electrical activation of a nitrogen-containing gas jet, it is possible to create an electric arc or corona discharge, the type of which depends on the distance between the electrodes. In order to ensure the effective interaction of the gas flow with the electric discharge, it is necessary to ensure the gas pressure at the level of 0.8-1.2 atm, and to place the blowing device at a height above the electric discharge at the level of 20-40 gauges. Compliance with the specified parameters will ensure effective interaction of the gas jet with the electric discharge in the form of an electric arc or corona discharge.

Key words: alloying, gaseous nitrogen, activation by electric discharge, physical modeling.

DOI: https://doi.org/10.52150/2522-9117-2023-37-211-219

For citation: Golub, Т. S., Molchanov, L. S., Semykin, S. І., & Prokopenko, P. H. (2023). Establishment of rational modes of interaction of gas flow and electric discharge for the development of the gaseous nitrogen alloying method using electrical activation. Fundamental and applied problems of ferrous metallurgy, 37, 211-219. https://doi.org/10.52150/2522-9117-2023-37-211-219

References

1. Simmons, J. W. (1996). Overview: high-nitrogen alloying of stainless steels.  Materials Science and Engineering: A, 207(2),159-169
2. Gawlik, J., Schmidt, J., Nowak, T., Wójcicki, Z., & Zagórski, A. (2017). Nitrogen as an alloying element improving material properties of the high carbon cast steel for ball mill liner plates. Archives of Civil and Mechanical Engineering, 17(4), 926-934
3. Kostina, M. V., Bannykh, O. A., & Blinov, V. M. (2000). Special Features of Steels Alloyed with Nitrogen. Metal Science and Heat Treatment, 42(11), 459-462
4. Richard, P. (1989). Reed Nitrogen in austenitic stainless steels. JOM, 41, 16-21
5. Morozov, А. I. (1968). Vodorod i azot v stali [Hydrogen and nitrogen in steel]. Мetalurgizdat [in Russian]
6. Pelke, R. D., & Elliot, I. F. (1963). The Solubiliny of Nitrogen in Liquid Iron Alloys. Trаnsaction of the Metallurgical Society of AIMЕ, 227(5), 849-855
7. Кazachkov, Ye. А. (1988). Raschety po teorii metalurgicheskih protsessov [Calculations based on the theory of metallurgical processes]. Меtallurgy [in Russian]
8. Gizatulin, R. А., Godik, L. А., Kozyrev, N. А., & Danilov, А. P. (2008). Razrabotka tehnologii vnepechnoy obrabotki relsovoy stali v aggregate kovsh-pech [Development of technology for out-of-furnace processing of rail steel in a ladle-furnace unit]. Electrometallurgy, (2), 11-13 [in Russian]
9. Rаshеv Ts. Sozdanie laboratornyh I promyshlenyh ustanovok dlia odnostadiynogo proizvodstva vysokoazotistoy stali [Creation of laboratory and industrial installations for one-stage production of high-nitrogen steel] // Electrometallurgy. – 2004.-№2.-P.6-10 [in Russian]
10. Zhekov, L., & Rashev, Ts. (2007). Issledovanie vozmoznosti sozdaniia vysokoazotistyh staley s ispolzovaniem metoda plavki vo vzveshannom sostoyanii pod vysokim davleniem [Study of the possibility of creating high-nitrogen steels using the flash smelting method under high pressure]. Мetallurgist, (2),37-41 [in Russian]
11. Zaselskiy, А. М. (1963). Elektricheskaya duga otklucheniia [Electric arc trip]. State Energy Publishing House [in Russian]