Method and apparatus for double vacuum production of steel

Details Method and apparatus for double vacuum production of steel Method and apparatus for double vacuum production of steel

1992-10-26

1993-10-12

Rosenberg, Peter D.

Specialized metallurgical processes, compositions for use therei

Processes

Producing or treating free metal

266207, 373 60, C21C 700

Patent

active

052521206

ABSTRACT:
A method and apparatus for producing high quality steel having less than about 1 ppm H, 50 ppm N, 25 ppm O and 0.005 S which includes subjection to vacuum, gas purging, and alternating current heating arcs, followed by shrouded pouring into sealed ingot molds to form a VAR electrode which is subsequently remelted under a very low absolute vacuum and re-solidified.

REFERENCES:
patent: 4994108 (1991-02-01), Hamagami

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