Method for the electroslag refining of metals, especially those

Details Method for the electroslag refining of metals, especially those Method for the electroslag refining of metals, especially those

1986-08-15

1988-02-23

Rosenberg, Peter D.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 1025, 75 1026, 75 49, B22D 2702

Patent

active

047268409

ABSTRACT:
Method for the electroslag refining of metals of which at least 50 weight-percent are in the form of at least one current-carrying consumable electrode, especially one having alloy components with an affinity for oxygen, wherein the metals are remelted to an ingot through a molten bath of slag. To achieve the object of preventing oxidation, freckling, rings and white spots and at the same time produce a degassing, the following measures are undertaken: (a) the refining process is performed at a subatmospheric pressure, (b) the slag is an at least 80 weight-percent oxidic slag of oxides whose boiling points are above 2000.degree. C., and (c) the slag is heated by means of alternating current.

REFERENCES:
patent: 3759311 (1973-09-01), Jackson
patent: 3868987 (1975-03-01), Galey

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