Outline of 25t Vacuum Refining Furnace

Abstract

A vacuum induction melting process is one of the most useful process for high-grade special steel production.
Yasugi Works of Hitachi Metals Ltd. have installed 25t ‘Vacuum Refining Furnace’, which is a type of vacuum induction furnace possible to charge a vacuum vessel with molten metal. This facility is effective for quality-improvement of tool steels, super alloys and others.
The facility has been operated satisfactorily since May, 1970 and showed excellent results in high-grade tool steels, super alloys, ultra low carbon stainless steels and other products. This paper is described the outline of the system and the operation on the 25t ‘Vacuum Refining Furnace’.