Process for producing a high cleanliness steel

Details Process for producing a high cleanliness steel Process for producing a high cleanliness steel

2008-07-08

2008-07-08

Kastler, Scott (Department: 1793)

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

C075S508000

Reexamination Certificate

active

07396378

ABSTRACT:
A process for producing a high-cleanliness steel is provided which can produce, without relying upon a high-cost remelting process, steel products having cleanliness high enough to satisfy requirements for properties of mechanical parts used under severe environmental conditions. The production process comprises the steps of: transferring a molten steel produced in an arc melting furnace or a converter to a ladle furnace to refine the molten steel; subjecting the molten steel to circulation-type degassing; and casting the molten steel into an ingot, wherein, in transferring the molten steel to the ladle furnace, a deoxidizer including aluminum and silicon, is added to previously deoxidize the molten steel, that is, to perform tapping deoxidation before refining in the ladle refining furnace.

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Wang Xueyao, “Secondary Metallurgy—Ladle Refining”,Special Steel, Aug. 1998, vol. 19, No. 4, 9 pp.

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