METHOD FOR PRODUCING HIGH CHROMIUM STEEL

PROBLEM TO BE SOLVED: To provide a method for producing a high Cr steel by which Cr oxidizing loss is reduced at the lower level in comparison with the conventional method when molten steel containing carbon and Cr is decarburize-refined in a refining furnace, such as a converter, an AOD furnace. SO...

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Bibliographische Detailangaben
Hauptverfasser:	NABESHIMA YUKI, NABESHIMA SHIGEYUKI
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY METALLURGY METALLURGY OF IRON PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
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Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a method for producing a high Cr steel by which Cr oxidizing loss is reduced at the lower level in comparison with the conventional method when molten steel containing carbon and Cr is decarburize-refined in a refining furnace, such as a converter, an AOD furnace. SOLUTION: When the high Cr steel having >=5 mass% Cr is produced by supplying oxygen gas in the refining furnace with the molten Cr-containing steel containing >=1 mass% C and >=5 mass% Cr to perform the decarburize- refining, after performing the decarburize-refining so that the molten steel temperature in the furnace before tapping, becomes 1,700-1,760 deg.C, the molten steel is tapped into a ladle pre-charging cooling material.