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US4726840A Method for the electroslag refining of metals, especially those having alloy components with an affinity for oxygen 失效
金属电渣精炼方法,特别是那些具有对氧气具有亲和力的合金成分的方法

Method for the electroslag refining of metals, especially those having
alloy components with an affinity for oxygen
摘要:
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.
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