Fabrication of a high-strength steel article with inclusion control during melting

A steel article is fabricated by providing an iron-base alloy having less than about 0.5 weight percent aluminum, melting the alloy to form a melt, adding calcium to the melt, thereafter adding aluminum to the melt to increase the aluminum content of the melt to more than about 0.5 weight percent al...

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Bibliographische Detailangaben
Hauptverfasser:	CULBERTSON GLENN CHARLES, RAYMOND EDWARD LEE, RHOADS MARK ALAN
Format:	Patent
Sprache:	eng
Schlagworte:	ALLOYS APPARATUS SPECIALLY ADAPTED THEREFOR BASIC ELECTRIC ELEMENTS CHEMISTRY CINEMATOGRAPHY ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR ELECTRICITY ELECTROGRAPHY FERROUS OR NON-FERROUS ALLOYS HOLOGRAPHY MATERIALS THEREFOR MEASURING MEASURING ELECTRIC VARIABLES MEASURING MAGNETIC VARIABLES METALLURGY METALLURGY OF IRON ORIGINALS THEREFOR PHOTOGRAPHY PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES,e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTORDEVICES PHYSICS PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL SEMICONDUCTOR DEVICES TESTING TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	A steel article is fabricated by providing an iron-base alloy having less than about 0.5 weight percent aluminum, melting the alloy to form a melt, adding calcium to the melt, thereafter adding aluminum to the melt to increase the aluminum content of the melt to more than about 0.5 weight percent aluminum, and casting the melt to form a casting. Other calcium additions may be made simultaneously with the adding of aluminum, and after the adding of aluminum but before casting the melt. The calcium additions deoxidize the melt to minimize the formation of clustered aluminum-oxygen-based inclusions.