Пiдвищення сталості процесу поверхневого нагріву пластини рухомим плазмовим джерелом

• Дата: 2023
• Автори: Лихошва, В. П., Надашкевич, Р. С., Шатрава, О. П.
• Формат: Стаття
• Мова: Ukrainian
• Опубліковано: National Academy of Sciences of Ukraine, Physical-Technological Institute of Metals and Alloys of NAS of Ukraine 2023
• Теми: мікрометалургійна ванна розплаву; концентровані джерела енергії; плазмове джерело нагріву; плазмова дуга прямої дії; рідкий метал; біметалеві пласкі вироби
• Онлайн доступ: https://plit-periodical.org.ua/index.php/plit/article/view/increasing-stability-process-surface-heating-plate-moving-plasma
• Назва журналу: Casting Processes

Physico-Technological Institute of Metals and Alloys of the NAS of Ukraine (Kyiv, Ukraine) UDK 533.951.8: 621.74.046 The research carried out in this work is aimed at optimizing the technological schemes and modes of heating metal plates with a concentrated energy source to obtain a flat liquid bath of melt under conditions of continuous action of the heat source. As well as the search for methods to stabilize the heating process, the uniformity of its parameters in order to use local heat treatment in a new hybrid method of production of bimetallic and multilayer products in a continuous process. The paper presents the results of research on the parameters and conditions of application of the method of surface heating of a metal plate using plasma. The critical and maximum permissible modes of surface heating in an oxidizing medium that satisfy the conditions of the liquid-phase connection during the subsequent pouring of the liquid melt have been studied. The penetration depths of metal surfaces under different processing conditions are determined. Various schemes of realization of this method of local heating are developed, results of experimental researches are presented and the most rational way of uniform and steady surface heating of a metal plate is defined. The optimal heating parameters that increase the stability and uniformity of this process, as well as provide conditions for creating a surface micrometallurgical melt bath of sufficient size and time of its existence - as necessary prerequisites for the entire continuous technological process of bimetallic and multilayer products. To increase the processing speed, as well as to expand the zone of influence of the heat source and increase the productivity of the technological process as a whole - the method of scanning heating is proposed, which consists in superimposing oscillations of the plasmatron with plane-parallel movement of the processed plate. It is shown that plane-parallel scanning makes it possible to increase the stability of the plasma arc combustion process, as well as to obtain a heating zone of different widths, which increases the range of products obtained for the proposed new method of creating bimetallic and multilayer products.   References  1 Paton B. Ye. (2000). Plasmennye technology na rubezhe vekov. (Plasma technologies at the turn of the century). Automaticheskaya svarka. No. 12. P. 3–5. [in Russian]. 2 Bandura A. N., Garkusha I. E., Birka O. V., Makhlai V. A. Modification of structural materials by pulsed plasma flows. / 9-th International conference "Interaction of radiation with a solid", September 20–22, 2011, Minsk, Belarus. [in Russian]. 3 Likhoshva V. P., Nadashkevich R. S. (2017). A new progressive method of producing of bimetal and multilayer products. / Thesis. add. on VI international sience-practical. conf. "Casting, Metallurgy-2017", Zaporizhzhya, pp. 167–168. [in Ukrainian].4 Chabak, Yu. G., Fedun, V. I., Pastukhova, T. V., Zurnadzhi, V.I., Efremenko, V.G., & Berezhnyj, S.P. (2017). Modification of steel surface by pulsed plasma heating. Voprosy Atomnoj Nauki i Tekhniki, (4–110), pp. 97–102.5 Samotugin, S. S., Gagarin V. A., Mazur V. A. (2017). Optimization of the design of a plasmatron for surface modification of steel products. / Bulletin of the Priazovsky State Technical University: coll. scientific works. DVNZ "PDTU". Mariupol, Ed. 35. pp. 104–110. [in Russian].6 Astrelin V. T., Burdakov A. V., Guber N. A., Kovenya V. M. (2001). Modeling of motion and heating of inhomogeneous plasma. Applied mechanics and technical physics. Vol. 42. No. 6. p. 3–18. [in Russian].7 Chigarov V. V., Kondrashov K. A., Makarenko, N. A. Granovskiy N. A. (2007). Plasma arc heating of a flat electrode axially fed into the plasmatron. Automaticheskaya svarka. No. 8, 2007, p. 23–28. [in Russian].8 Plakhovskiy S. I., Tsegelnik E. V., Garin V. O. (2010). Modeling of flows in cathode nodes of plasma equipment when describing an arc with a volumetric energy source. Vestnik dvigatelestroyeniya. No. 1. P. 8–15. [in Russian].9 Shi, J. J., Liu, D. W. and Kong, M.G. (2006). Plasma stability control using dielectric barriers in radio-frequency atmospheric pressure glow discharges. Applied Physics Letters. 89 (8), article 081502, pp. 1–3. Recieved from: https://aip.scitation.org/doi/abs/10.1063/1.233864710 Kim, Sung Je, Heberlein, Joachin, Lindsay, Jon, Peters, John (2010). Methods to evaluate arc stability in plasma arc cutting torches. Journal of Physics D: Applied Physics, Vol. 43, 2010, pp. 505202. https://doi.org/10.1088/0022-3727/43/50/505202 11 Duan, Z., Heberlein, J. (2002). Arc instabilities in a plasma spray