Non-oriented electrical strip and process for its production

US5258080A · kind A · utility

Assignee

• EBG Gesellschaft für Elektromagnetische Werkstoffe mbH · DE

Inventors

• Rolf Dieter Hans-Jochen Bürger · Dresden, DE
• Gert Lehmann · Vejle, DK
• Wolfgang Lindner · Dormagen, DE
• Harry Wich · Dresden, DE
• Jochen Wieting · Dresden, DE

Key dates

• Filing date: Dec 4, 1990
• Grant date: Nov 2, 1993
• Expiry date: Dec 4, 2010

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C21D8/1244
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The invention relates to a non-oriented electrical strip having high proportions of cube or cube on face texture, a polarization of J 2500>1.7 T and a low core loss, and also to a process for its production. A steel slab, containing max. 0.025% C, less than 0.1% Mn, 0 to 0.15% boundary-surface-active elements and Si and Al in such a way that the relations (% Si)+2(% Al)>1.6% and (% Si)+(% Al)<4.5% are met, balance iron, is hot rolled to a thickness not lower than 3.5 mm. The resulting hot rolled strip is then cold rolled with a degree of reduction of at least 86% without intermediate recrystallization annealing and, if necessary, final annealed.