METHOD FOR CASTING METAL IN VACUUM AND APPARATUS FOR PERFORMING THE SAME Russian patent published in 2005 - IPC

FIELD: production of Ni, Fe or Al base alloys, manufacture of castings of such alloys by precise casting in vacuum, melting charge billets.

SUBSTANCE: method comprises steps of creating in melting furnace electromagnetic field for melting and agitating metal in crucible in evacuated condition; providing in part of crucible by means of dividing partition space non-subjected to action of electromagnetic field. When metal is agitated, non-metallic inclusions move vertically and through openings of dividing partition they penetrate to space formed by partition and float up. Metal is further purified from non-metallic inclusions at pouring metal out of crucible through filtering members.

EFFECT: improved purity degree of metal in crucible and in castings.

25 cl, 9 dwg