Electrometallurgy Today, 2022, №01



2022 №01 (04)

DOI of Article 10.37434/sem2022.01.05

2022 №01 (06)

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Electrometallurgy Today (Sovremennaya Elektrometallurgiya), 2022, #1, 40-46 pages

Technology for smelting zirconium alloy ingots by vacuum arc remelting with consumable electrode

O.Ye. Kapustian¹, I.A. Ovchynnykova², V.A. Zhdan², Yu.M. Savonov¹

¹Zaporizhzhia Polytechnic National University. 64 Zhukovsky Str, 69063, Zaporizhzhia, Ukraine. E-mail: aek@zntu.edu.ua
²Zaporizhzhia National University. 66 Zhukovsky Str, 69063, Zaporizhzhia, Ukraine. E-mail: iaov31@gmail.com

Abstract
The results of studying the possibility of obtaining ingots from zirconium alloy of Zr‒Nb‒Ti system, using the method of vacuum arc remelting with a consumable electrode, are presented. Ingots of 50 mm diameter produced by remelting with a non-consumable electrode in a skull furnace were used as consumable electrodes. The technology of producing a zirconium alloy of a given composition by the method of vacuum-arc remelting of a consumable electrode into a copper mould has been developed. A complex of technological and material science problems was solved, a study of technological factors, metallurgical methods and processes, associated with selection of melting equipment and fixtures was carried out, a technological process was developed for obtaining ingots of a given homogeneous chemical composition for further deformation processing and producing an initial billet. An ingot of 120 mm diameter was melted in a vacuum arc furnace. The technological parameters of melting during arc remelting with a consumable electrode in a vacuum arc furnace were determined. A study of ingot metal of an experimental alloy of Zr‒Nb‒Ti system by the method of ultrasonic flaw detection showed absence of internal structural defects, namely discontinuities, shrinkage cavities, porosity or large non-metallic inclusions. Ref. 16, Table. 2, Fig. 3.
Keywords: vacuum arc remelting; furnace; electrode; arc; vacuum; zirconium alloy; ingot; technology; quality

Received 06.10.2021

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