Chromium-containing metal and method for producing the same

Details Chromium-containing metal and method for producing the same Chromium-containing metal and method for producing the same

2006-02-28

2006-02-28

Andrews, Melvyn J. (Department: 1742)

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

Reexamination Certificate

active

07004992

ABSTRACT:
The high-Cr-containing metal according to the present invention is a chromium-containing metal manufactured in an arc melting furnace, and contains at least 85% Cr, up to 0.005% Al, up to 0.1% Si, and up to 0.002% S. The manufacturing method of this high-Cr-containing metal comprises the steps of reducing chromium oxides heated and melted in the arc melting furnace with Si, obtaining a molten metal containing at least 85% Cr, then, discharging slag generated in this Si reduction from the arc melting furnace, adding a basic flux into the arc melting furnace after discharging slag, melting the basic flux by electric arc, refining the molten metal by contacting the slag generated through melting of the basic flux with the molten metal, and then, tapping the molten metal from the arc melting furnace and cast.

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S.H. Sully, “Chromium”,Metallurgy of the Rarer Metals, (1954), pp. 28-29, Butterworths Scientific Publications, London, England.

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