Method of producing steel sections of improved quality

US4175985A · kind A · utility

Assignees

• Centre De Recherches Metallurgiques-Centrum Voor Research in De Metallurgie · BE
• ARBED Acieries Reunies de Burbach-Eich-Dudelange S.A. · LU

Inventors

• Emile Blondelot · Esch-sur-Alzette, LU
• Marios Economopoulos · Liège, BE
• Stephan Wilmotte · Chaudfontaine, BE

Key dates

• Filing date: May 11, 1978
• Grant date: Nov 27, 1979
• Expiry date: May 11, 1998

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C21D1/02
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A steel section 6 to 40 mm thick, emerging from a hot rolling mill at 1000.degree. to 800.degree. C. is surface quenched for 2 to 6 seconds at a cooling rate of the order of 1.5 to 5 MW/m.sup.2. During subsequent self-tempering of the quenched surface by heat from the remainder, the section tends to an equalization temperature of 500.degree. to 700.degree. C.