| 摘要 |
<p>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.</p> |
