Журналы →  Tsvetnye Metally →  2023 →  №5 →  Назад

MATERIALS SCIENCE
Название Heat-resistant wire made of Al – Zr – Hf alloy: composition and production
DOI 10.17580/tsm.2023.05.11
Автор Timofeev V. N., Usynina G. P., Motkov M. M., Zakharov V. V.
Информация об авторе

Siberian Federal University, Krasnoyarsk, Russia1 ; RPC of Magnetic Hydrodynamics Ltd., Krasnoyarsk, Russia2:

V. N. Timofeev, Head of the Department of Electrotechnology and Electrical Engineering1, Director2, Doctor of Technical Sciences

M. M. Motkov, Senior Researcher1, Project Leader2

 

RPC of Magnetic Hydrodynamics Ltd., Krasnoyarsk, Russia:

G. P. Usynina, Principal Materials Scientist, e-mail: galina@usynina.ru

 

All-Russian Institute of Light Alloys, Moscow, Russia:
V. V. Zakharov, Head of the Laboratory of Physical Metallurgy and Aluminium Alloys Technology, Doctor of Technical Sciences

Реферат

This paper describes the results of an attempt to develop a new Al – Zr – Hf-base alloy, which, compared with the well-known ATsE alloy (0.2–0.45% Zr), is doped with hafnium and which nevertheless has a lower total concentration of zirconium and hafnium (0.3%) and because of this a lower cost. Combined doping with zirconium and hafnium in the 1:1 proportion resulted in the production of ingots cast at a high cooling rate (103 oC/sec) and having the structure of a solid solution of zirconium and hafnium in aluminium. Particles of Al3(Zr1-xHfx) intermetallics that get separated as the solid solution breaks down ensure a high heat resistance of Al – 0.15 Zr – 0.15 Hf wire. The process used for making long-length drawing billets (which involves casting into an electromagnetic mould followed by highintensity deformation in the Conform unit) ensured high processability resulting in the production of fine 0.5 mm wire. Several different regimes of final annealing were tested and a two-stage regime (400 oC/2 h + 300 oC/10 h) was selected that ensured an acceptable level of mechanical properties (σв = 153–176 MPa, σ0.2 = 130–140 MPa, σ = 12–15 %) and the specific electrical resistivity equal to 0.02955–0.02970 Ohm·mm2/m. As the diffusivity of hafnium in aluminium is higher than that of zirconium, no long soaking times were required for the final annealing of Al – 0.15 Zr – 0.15 Hf wire. Like it is with the wire made of the well-known ATsE alloy (aluminium-zirconium). The breakdown time of the solid solution of zirconium and hafnium was times shorter than that of the solid solution of zirconium in aluminium. The obtained 0.5 mm wire made of Al – 0.15 Zr – 0.15 Hf was successfully tested at OKB KP (Special Design Bureau of the Cable Industry).
Support for this research was provided under Grant No. 22-19-00128 by the Russian Science Foundation, https://rscf.ru/project/22-19-00128/.

Ключевые слова Aluminium alloys, wire, onboard wires, electromagnetic mould, annealing, cooling rate, zirconium, hafnium
Библиографический список

1. Dobatkin V. I., Elagin V. I., Fedorov V. M. Rapidly solidified aluminium alloys. Moscow : VILS, 1995. 340 p.
2. Timofeev V. N., Usynina G. P., Lebedev V. N., Konkevich V. Yu. Production of aluminum alloy onboard wire with a high content of rare-earth me tals produced using electromagnetic crystallization. Tsvetnye Metally. 2022. No. 1. pp. 72–78. DOI: 10.17580/tsm.2022.01.09
3. Avdulov A. A., Usynina G. P., Sergeev N. V., Gudkov I. S. Distinctive features of the structure and characteristics of long-length light gauge ingots from aluminium alloys, cast into electromagnetic crystallizer. Tsvetnye Metally. 2017. No. 7. pp. 73–77. DOI: 10.17580/tsm.2017.07.12
4. Timofeev V. N., Usynina G. P., Motkov M. M., Gudkov I. S. Production of rivet wire from billets produced from V65 alloy by electromagnetic crystallization. Tsvetnye Metally. 2019. No. 3. pp. 76–82. DOI: 10.17580/tsm.2019.03.11

5. Belov N. A., Alabin A. N., Prokhorov A. Yu. Annealing effect on electrical resistance and mechanical properties of cold-worked alloy Al – 0,6% (mass) Zr. Tsvetnye Metally. 2009. No. 10. pp. 65–68.
6. Belov N. A., Korotkova N. O., Akopyan T. K., Timofeev V. N. Structure and properties of Al – 0.6% Zr – 0.4% Fe – 0.4% Si (wt.%) wire alloy manufactured by electromagnetic casting. Journal of Magnesium and Alloys. 2020. Vol. 72, Iss. 4. pp. 1561–1570. DOI: 10.1007/s11837-019-03875-0
7. Chen B., Zhu Z., Wang R., Chen X. et al. Effect of Zr content on aging precipitation and properties of Al – Zr alloy. Heat Treatment of Metals. 2021. Vol. 46, Iss. 9. pp. 47–53. DOI: 10.13251/j.issn.0254-6051.2021.09.008
8. Mansurov Y. N., Rakhmonov J. U., Aksyonov A. A. Modified aluminum alloys of Al – Zr system for power transmission lines of Uzbekistan. Non-ferrous Metals. 2020. Vol. 2. pp. 51–55. DOI: 10.17580/nfm.2020.02.06
9. Rokhlin L. L., Bochvar N. R. A physico-chemical study of aluminium alloys containing several transition metals. All materials. Reference book. 2014. No. 2. pp. 37–42.
10. Nokhrin A., Shadrina I., Chuvil'deev V., Kopylov V. et al. Investigation of thermal stability of microstructure and mechanical properties of bimetallic fine-grained wires from Al – 0.25% Zr – (Sc, Hf) alloys. Materials. 2022. Vol. 15, Iss. 1. 185.
11. Rokhlin L. L., Bochvar N. R., Boselli J., Dobatkina T. V. Investigation of the Al-rich part of the Al – Zr – Hf phase diagram for solid state. Journal of Phase Equilibria and Diffusion. 2010. Vol. 31, Iss. 6. pp. 504–508. DOI: 10.1007/s11669-010-9778-5
12. Aryshnskii E. V., Bazhin V. Yu., Kawalla R. Strategy of refining the structure of aluminummagnesium alloys by complex microalloying with transition elements during casting and subsequent thermomechanical processing. Non-ferrous Metals. 2019. Vol. 1. pp. 28–32. DOI: 10.17580/nfm.2019.01.05
13. GOST 10446-80. Wire. Tensile test method. Introduced: 30.06.1982.
14. GOST 7229. Cables, wires and cords. Method of measuring electrical resistance of conductors. Introduced: 01.01.1978.
15. GOST R MEK 62004-2014. Thermal-resistant aluminium alloy wire for overhead line conductor. Introduced: 01.01. 2016.
16. Usynina G. P., Timofeev V. N., Khomenkov P. A., Motkov M. M., Gudkov I. S., Zakharov V. V. Alloy based on aluminum for production of wire and method for obtaining it. Patent RF, No. 2753537. Applied: 04.02.2021. Published: 17.08.2021. Bulletin No. 23.

Language of full-text русский
Полный текст статьи Получить
Назад