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2021 №03 (08) DOI of Article
10.37434/sem2021.03.01
2021 №03 (02)

Electrometallurgy Today 2021 #03
SEM, 2021, #3, 5-8 pages

Influence of external longitudinal magnetic field on ESR electric modes

Authors
I.V. Protokovilov, V.B. Porokhonko, D.A. Petrov
E.O. Paton Electric Welding Institute of the NAS of Ukraine. 11 Kazymyr Malevych Str., Kyiv, 03150, Ukraine. E-mail: office@paton.kiev.ua

Abstract
The impact of external longitudinal constant and pulsed magnetic fields on ESR electric modes was studied. Experiments were conducted at remelting of consumable electrodes of 70 mm dia. from commercial purity titanium VT1-0 in a copper water-cooled mould of 105 mm dia. External longitudinal magnetic field with 0.1...0.28 T induction was created by a solenoid located outside the mould. It was found that application of a constant longitudinal magnetic field leads to 12...20 % reduction of the melting current and increase of its oscillation amplitude to 15...18 %. At application of a pulsed longitudinal magnetic field reduction of melting current is of a cyclic nature, and the magnitude of its drop can reach 70...80 %. The mechanisms of the influence of a longitudinal magnetic field on ESR current are suggested, which consist in the change of the area of contact of consumable electrode with liquid slag, as a result of vibrations and sagging of the slag pool free surface. Ref. 6, Fig. 4.
Keywords: electroslag remelting; longitudinal magnetic field; pulsed field; slag pool; melting current; electric modes

Received 11.05.2021

References

1. Kompan, Ya.Yu., Nazarchuk, A.T., Protokovilov, I.V. (2006) Burn-resistant titanium of mEm technology for aeroengines. materials Technology. Advanced Performance Materials, 21(2), 80-84. https://doi.org/10.1179/mte.2006.21.2.80
2. Protokovilov, I., Porokhonko, V., Nazarchuk, A. (2016) ESR of titanium with electromagnetic effect on metal solidification. In: Proc. of the Medovar Memorial Symposium (June 7-10, 2016, Kyiv, Ukraine), 110-115.
3. Protokovilov, I.V. (2011) mHD-technologies in metallurgy (Review). Sovrem. Elektrometal., 4, 32-41 [in Russian].
4. Tir, L.L., Stolov, m.Ya. (1975) Electromagnetic device for control of melt circulation in electric furnaces. moscow, metallurgiya [in Russian].
5. Verte, L.A. (1975) Magnetic hydrodynamics in metallurgy. moscow, metallurgiya [in Russian].
6. Protokovilov, I.V., Porokhonko, V.B. (2017) Physical modeling of electrode metal drop transfer in ESm with superposition of pulsed magnetic fields. Suchasna Elektrometal., 3, 9-13 [in Ukrainian]. https://doi.org/10.15407/sem2017.03.02

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