Method for refining chromium-containing molten steel by decarbur

Details Method for refining chromium-containing molten steel by decarbur Method for refining chromium-containing molten steel by decarbur

1994-12-01

1996-07-30

Andrews, Melvyn

Specialized metallurgical processes, compositions for use therei

Processes

Producing or treating free metal

C21C 535

Patent

active

055407536

ABSTRACT:
The present invention provides a method for refining a molten chromium-containing steel by decarburization according to a combined-blown process, which contributes to an improvement in decarburization rate and realizes efficient decarburization while preventing [Cr] contained in the molten steel from being oxidized. The method is characterized in that, in a region where the [C] concentration of the molten chromium-containing steel is not less than 0.15%, oxygen or a gas mixture of oxygen with an inert gas is blown through a top-blown lance onto the surface of the molten steel under the following conditions:

REFERENCES:
patent: 3854932 (1974-12-01), Bishop

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