Method for the refining of steel

US4174212A · kind A · utility

Assignee

• A. Finkl & Sons Co. · US

Inventors

• Hannsgearg G. Bauer · Witten, DE
• Manfred Walter · Nuremberg, DE
• Erick Heimrich · Witten, DE

Key dates

• Filing date: Mar 10, 1978
• Grant date: Nov 13, 1979
• Expiry date: Mar 10, 1998

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C21C7/0685
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A method of producing steel, particularly stainless steel with a high Cr content, having a C content of 0.03% or less which consists of firstly, lowering the C content of a molten steel bath into the preferred range of about 0.2% to about 0.4% by treating the bath with gaseous oxygen under atmospheric pressure, and secondly, subjecting the steel bath to the simultaneous effect of agitation, as by the passage of an inert gas upwardly there through, and a sub-atmospheric pressure until the C content is lowered into the desired low range.