Perm National Research Polytechnic University, Perm, Russia.

S. D. Neulybin, Research Supervisor of the Laboratory of Methods for Creation and Design of “Material – Technology – Construction” Systems, Candidate of Technical Sciences, e-mail: sn-1991@mail.ru
А. N. Yurchenko, Junior Researcher, Laboratory of Methods for Creation and Design of “Material – Technology – Construction” Systems, e-mail: aleksmto@gmail.com

The art icle is devoted to the development of technologies for the additive manufacturing of metal products including aluminum alloys. In recent years, additive technologies have made significant progress in improving the methods of applying the material, however, the task of reducing costs in 3D printing remains urgent. One of the ways to solve this problem may be to ensure minimum allowances before finishing surfaces, especially for aluminum alloys, which have increased roughness during WAAM printing due to limited surface wettability because of the presence of an oxide film. A study has been conducted on the possibility of improving the surface quality of a prototype made of aluminum alloy 4047, obtained by arc surfacing with a melting electrode. A method of additional exposure is proposed immediately after surfacing the prototype by sealing the workpiece side surface using a direct-acting plasma arc of reverse current polarity. The microstructure has been evaluated before and after the surface melting. It is shown that the application of a special treatment mode does not harm the microstructure. Using 3D scanning, it has been found that the surface of the prototype after plasma arc melting becomes smoother compared to the initial state, which ultimately reduces surface roughness by up to 2 times and reduces the cost of finishing mechanical treatment.
The research was carried out with the financial support of the Ministry of Science and Higher Education of the Russian Federation within the framework of the state assignment “Development of scientific and technological foundations for the formation of a material-structure system with special properties based on hybrid additive technologies” No. FSNM-2024-0003.

1. Kuznetsov M. A., Danilov V. I., Krampit M. A., Chinakhov D. A., Slobodyan M. S. Mechanical and tribological properties of a metal wall grown by electric arc method in a protective gas environment. Obrabotka metallov (tekhnologiya, oborudovaniye, instrumenty). 2020. Vol. 22, No. 3. pp. 18–32.
2. Vlasov S. A. Restoration of crests of wheel sets of rolling stock by electric arc welding. Universum: tekhnicheskiye nauki. 2023. No. 6–2. pp. 19–25.
3. Krupin A. E., Tarukin E. M., Maslov I. M. Wear resistance of coatings during hardening of harrow teeth by electric arc welding. Vestnik VSGUTU. 2018. No. 3. pp. 48–54.
4. Reshchikov E. O., Tuzhilin S. P., Zadorozhny R.N. Restoration of balance beams of tracked vehicles by electric arc method. Metallobrabotka. 2020. No. 1. pp. 29–36.
5. Golikov N. I., Saraev Yu. N., Tikhonov R. P., Semenov S. V. et al. A method for restoring parts of mining equipment used in the conditions of the North. Nauka i obrazovaniye. 2017. No. 4. pp. 82–87.
6. Nikitin K. V., Zhatkin S. S., Chernikov D. G., Skoroumov A. K. et al. Application of magnetic pulse treatment in electric arc welding of AD1H alloy. Litio i metallurgiia. 2023. No. 4. pp. 101–108.
7. Ivanov V. P., Razmyshlyaev A.D., Lavrova E. V. Control of the formation of the penetration zone during welding with a melting electrode in a protective gas environment. Vestnik priazovskogo gosudarstvennogo tekhnicheskogo universiteta. Seriia: Tekhnicheskiye nauki. 2016. Iss. 32. pp. 118–125.
8. Maximets N. A., Isupov N. V. Review of modern methodological support for calculating seam sizes during mechanized welding in a mixture of gases. Universum: tekhnicheskiye nauki. 2020. No. 6–1. pp. 33–35.
9. Ovchinnikov I. P., Schitsyn Y. D., Olshanskaya T. V. et al. Influence of layerby-layer surfacing with object additive formation on AMg5 alloy structure and properties. Metallurgist. 2024. Vol. 68, No. 4. pp. 552–563.
10. Ovchinnikov I. P., Shchitsyn Yu. D., Olshanskaya T. V., Neulybin S. D. Influence of layer-by-layer surfacing technology during additive product formation on the structure and properties of AMg5 alloy. Metallurg. 2024. No. 4. pp. 59–65.
11. Shchitsyn Yu. D., Krivonosova Е. А., Olshanskaya Т. V., Neulybin S. D. Structure and properties of aluminium – magnesium – scandium alloy resultant from the application of plasma welding with by-layer deformation hardening. Tsvetnye Metally. 2020. No. 2. pp. 89–94.
12. Shchitsyn Y. D., Shchitsyn V. Y., Herold H., Weinhart W. Plasma welding of aluminium alloys. Welding International. 2003. Vol. 17, No. 10. pp. 825–832.