C - Chemistry – Metallurgy – 21 – C
Patent
C - Chemistry, Metallurgy
21
C
C21C 7/10 (2006.01) F27D 25/00 (2010.01) F27D 27/00 (2010.01) C21C 7/072 (2006.01)
Patent
CA 2404633
The invention concerns a vacuum treatment of cast metal in liquid form comprising steps which consist in: introducing the cast metal in liquid form into the metallurgic ladle filling said ladle until a guard height ranging between 0.4 and 0.6 m is reached; treating the metal while bringing the atmosphere above said ladle under vacuum and simultaneously stirring the cast metal by injecting helium into the base of said ladle during part of or the whole treatment.
L'invention concerne un procédé de traitement sous vide d'un métal fondu sous forme liquide comprenant les étapes consistant à: introduire le métal fondu sous forme liquide dans une poche métallurgique en remplissant ladite poche jusqu'à atteindre une hauteur de garde comprise entre 0,4 et 0,6 m, traiter le métal tout en mettant l'atmosphère au dessus de ladite poche sous dépression et en procédant simultanément à un brassage du métal fondu par injection d'hélium dans le fond de ladite poche pendant une partie ou la totalité du traitement.
Burty Marc
Domgin Jean-Francois
Gardin Pascal
Leclercq Frederic
Reitz Raymond
Robic
Usinor
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