Electronic edition ISSN 1574-0579

MHD effects by full stirring during continuous casting of steel

V. V. Buriak¹ - A. A. Kolesnichenko¹ - A. F. Kolesnichenko^1,2

¹ Net Shape Cast (Ukraine), 87, 18/1 Rusanivska Naberezhna, Kiev, 02147, Ukraine e-Mail: nscukr@itm.net.ua
² Net Shape Cast, Inc., 17 Lockerbie Drive, Valparaiso, IN 46385, USA

Abstract
The method of pulsed flow organization in the liquid part of a billet (full stirring) was set up and applied in commercial casting devices. This method is based on the generation of a pulsed magnetic pressure in the molten steel confined in the mould and on the spreading of pressure waves towards the liquid part of the ingot. These waves are of acoustic nature and lead to a pulsed motion of liquid steel along the solidification front, where forced convection intensifies the interfacial transfer. The non-stationary magnetohydrodynamic (MHD) problem was solved to estimate the intensity of stirring under the conditions of pulsed MHD flow along the solidification front. The spreading of acoustic waves was described to determine conditions for resonance. Full stirring provides a complete control of the solidification process up to the end of solidification. As an evidence of the controlled solidification process, the crystalline structure of steel billets is shown. Figs 4, Refs 6.