Electrometallurgy Today, 2020, №04



2020 №04 (08)

DOI of Article 10.37434/sem2020.04.01

2020 №04 (02)

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Electrometallurgy Today (Sovremennaya Elektrometallurgiya), 2020, #4, 3-6 pages

Electroslag remelting of consumable electrodes of variable section

L.B. Medovar¹, Y.O. Pedchenko¹, A.V. Sybir², V.L. Petrenko¹, D.V. Kolomiets¹

¹E.O. Paton Electric Welding Institute of the NAS of Ukraine. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: office@paton.kiev.ua
²National Metallurgical Academy of Ukraine. 4 Gagarin Ave., 49600, Dnipro, Ukraine. E-mail: nmetau@nmetau.edu.ua

Abstract
The practice of using electroslag remelting for recycling worn rollers of slab type continuous casters is considered. The expediency of remelting the rollers without cutting off necks and welding them into a solid consumable electrode is shown. The use of ESR with a two circuit scheme for remelting rollers with necks is proposed and investigated on experimental melts. Electrodes of a variable section of 150 mm diameter were used as electrodes-simulators of real rollers, which simulated the 110 mm and 80 mm barrel of a roller, as well as the transition from the barrel to the neck and the neck proper of a real roller of slab caster, respectively. The filling factor varied from 0.69 to 0.2. Two series of experimental melts were performed in order to obtain a stable depth of the two-phase zone during the ingot solidification. It was found that the same remelting rate and depth of the two-phase zone are preserved at 2:1 ratio of electric power supplied to the consumable electrode to the power supplied to the current-supplying mould. Ref. 8, Fig. 3.
Keywords: electroslag remelting; recycling; roller; continuous casting; consumable electrode; mushy zone; current supplying mould

Received 17.12.2020

References

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