Siberian Federal University, Krasnoyarsk, Russia:

S. B. Sidelnikov, Head of the Department “Metal Forming”
D. S. Voroshilov, Associate Professor of the Department “Metal Forming”, e-mail: sibdrug@mail.ru
M. V. Pervukhin, Professor of the Department of Electrotechnology and Electronics
M. M. Motkov, Post-Graduate Student

The article presents the results of experimental studies of the technology for the production of electrical wire from aluminum alloy 01417 with a content of rare-earth metals (REM) in the range of 7–9%. As the source used the billet with a diameter of 12 mm, obtained by the method of casting in an electromagnetic mold (EMM). The main technological redistribution was hot deformation of this billet using the method of combined rolling-extruding (CRE) with the aim of obtaining a bar with a diameter of 5 mm, and cold deformation using bar rolling and drawing to obtain a wire with a diameter of 0.5 mm. Described deformation modes, methods of experiments and equipment for the implementation of the proposed technology. At all stages of the technology, samples were taken and studies of the mechanical and electrical properties of the obtained deformed semi-finished products (temporary tensile strength, relative elongation and electrical resistivity) were carried out. It was found that the plastic properties of hot-extruded rods obtained by the method of CRE, allow carrying out cold deformation using only one intermediate annealing. The effect of various heat treatment conditions on the mechanical and electrophysical properties of a wire with a diameter of 0.5 mm is studied. Analysis of experimental data revealed that the maximum ductility (temporary tensile strength of 137 MPa and an elongation of 19.1%) for further drawing and the minimum value of electrical resistivity (0.02902 Ohm·mm2/m) has a wire with a diameter of 0.5 mm, obtained by the EMM+CRE technology followed by bar rolling and drawing, annealed at a temperature of 500 °C and a holding time of 1 h. The developed modes of deformation and heat treatment allow to achieve the required values of mechanical properties and electrical conductivity for wire from alloy 01417 in accordance with the technical specifications 1-809-1038–2018.

1. Gorokhov Yu. V., Sherkunov V. G., Dovzhenko N. N. et al. Continuous pressing: Design basics. Krasnoyarsk : Sibirskiy federalnyy universitet, 2013. 224 p.
2. Sidelnikov S. B., Dovzhenko N. N., Zagirov N. N. Combined techniques in non-ferrous metals and alloys processing. Moscow : MAKS Press, 2005. 344 p.
3. Sidelnikov S. B., Lopatina E. S., Dovzhenko N. N. et al. The structure and properties of metal in rapid solidification/deformation and aluminium alloys inoculation. Krasnoyarsk : Sibirskiy federalnyy universitet, 2015. 179 p.
4. Gorbunov Yu. A. The role and prospects of rare earth metals in the development of physico-mechanical properties and applications of wrought aluminium alloys. Zhurnal Sibirskogo federalnogo universiteta. Seriya: Tekhnika i tekhnologii. 2015. Vol. 8, No. 5. pp. 636–645.
5. Liao H., Wu Y., Wang Y. Microstructure Evolution of Al – 0,35% Si – 0,2% Mg – 0,3% Ce Alloy During Hot Extrusion and Its Contributions to Performances. Journal of Materials Engineering and Performance. 2015. Vol. 24, No. 6. pp. 2503–2510.
6. Liao H., Liu Y., Lü C., Wang Q. Mechanisms for Ce-induced remarkable improvement of conductivity in Al alloys. Journal of Materials Research. 2017. Vol. 32, No. 3. pp. 566–574.
7. Shi Z. M., Gao K., Shi Y. T., Wang Y. Microstructure and mechanical properties of rare-earth-modified Al – 1Fe binary alloys. Materials Science and Engineering: A. 2017. No. 632. pp. 62–71.
8. Zhang Meng, Wang Haoyu, Han Wei et al. Electrochemical extraction of cerium and formation of Al – Ce alloy from CeO₂ assisted by AlCl₃ in LiCl – KCl melts. Science China Chemistry. 2014. Vol. 57, No. 11. pp. 1477–1482.
9. Sudavtsova V. S., Shevchenko M. A., Berezutskiy V. V. et al. Thermodynamic properties and phase equilibria in Al(Si) – Ce binary alloys. Zhurnal fizicheskoy khimii. 2014. Vol. 88, No. 5. pp. 736– 746.
10. Mogucheva A., Zyabkin D., Kaibyshev R. Effect of the thermomechanical processing on microstructure and properties of an Al – Ce alloy. Materials Science Forum. 2012. Vol. 706–709. pp. 361–366.
11. Belov N. A., Alabin A. N., Teleuova A. R. Comparative analysis of alloying additives as applied to the production of heat-resistant aluminum-base wires. Metal Science and Heat Treatment. 2012. Vol. 53, Iss. 9–10. pp. 455–459.
12. Sidelnikov S. B., Dovzhenko N. N., Voroshilov D. S. et al. Understanding the structure of metal and analyzing the properties of Al – REM alloy specimens obtained through a combination of casting and forming techniques. Vestnik of Nosov Magnitogorsk State Technical University. 2011. No. 2 (34). pp. 23–28.
13. TU 1-809-63–2018. Electrical wire made of 01417 grade aluminium alloy. Specification. Introduced: 13.06.2018.
14. Motkov M. M. Developing and studying a process for producing Al-REM alloy wire through combined processing. Proceedings of the International Student Conference “Svobodnyy Prospekt-2019”. (Krasnoyarsk, 22–26 April 2019). Krasnoyarsk : Sibirskiy federalnyy universitet, 2019.
15. GOST 1497–84. Metals. Methods of tension test. Introduced: 01.01.1986.
16. GOST 10446–80. Wire. Tensile test method. Introduced: 01.07.1982.
17. GOST 7229–76. Cables, wires and cords. Method of measuring electrical resistance of conductors. Introduced: 01.01.1978.