EP 1509627 B1 20050831 - PROCESS FOR PRODUCING COLD-ROLLED STEEL STRIP HAVING A Si-CONTENT OF AT LEAST 3.2 WT.-% USED FOR ELECTROMAGNETIC PURPOSES
Title (en)
PROCESS FOR PRODUCING COLD-ROLLED STEEL STRIP HAVING A Si-CONTENT OF AT LEAST 3.2 WT.-% USED FOR ELECTROMAGNETIC PURPOSES
Title (de)
VERFAHREN ZUM HERSTELLEN EINES KALTGEWALZTEN STAHLBANDES MIT EINEM Si-GEHALT VON MINDESTENS 3,2 GEW.-% FÜR ELEKTROMAGNETISCHE ANWENDUNGEN
Title (fr)
PROCEDE DE PRODUCTION DE FEUILLARD D'ACIER LAMINE A FROID AYANT UN TENEUR EN Si D'AU MOINS 3,2% EN POIDS DESTINE A DES UTILISATIONS ELECTROMAGNETIQUES
Publication
Application
Priority
- DE 10220282 A 20020507
- EP 0304588 W 20030502
Abstract (en)
[origin: US2006086429A1] The present invention relates to a cold-rolled steel strip or sheet in thicknesses of <=0.70 mm for electromagnetic applications, consisting of a steel containing (in % by weight) C: <0.01%, Si: 3.2-7%, Al: <2%, Mn: <=1%, the remainder being iron and usual impurities, which after smelting has been cast to form a base material, such as a slab, a thin slab, or a thin strip, which has then been heated through to temperature T<SUB>R</SUB>>1000° C. and has been final hot-rolled at a hot-rolling final temperature T<SUB>F</SUB>>800° C. to form a hot strip, which has then been cooled, starting from a temperature T<SUB>C </SUB>of the hot strip amounting to at least 750° C. but less than 850° C., at a cooling speed DeltaT/Deltat of at least 400° C./min. to a temperature of less than 300° C., subjected after cooling to a surface treatment such as mechanical descaling and/or pickling, after the surface treatment has been cold-rolled at a temperature amounting to maximum 500° C., and has finally been final-annealed.
IPC 1-7
IPC 8 full level
C21D 8/12 (2006.01); C21D 9/46 (2006.01); C22C 38/00 (2006.01); C22C 38/06 (2006.01); H01F 1/16 (2006.01)
CPC (source: EP US)
C21D 8/1211 (2013.01 - EP US); C21D 8/1255 (2013.01 - EP US); C21D 8/1272 (2013.01 - EP US); C21D 9/52 (2013.01 - EP US); C22C 38/004 (2013.01 - EP US); C22C 38/02 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 03095683 A1 20031120; AT E303455 T1 20050915; AU 2003229765 A1 20031111; DE 10220282 C1 20031127; DE 50301115 D1 20051006; EP 1509627 A1 20050302; EP 1509627 B1 20050831; ES 2248742 T3 20060316; JP 2005530033 A 20051006; US 2006086429 A1 20060427
DOCDB simple family (application)
EP 0304588 W 20030502; AT 03722586 T 20030502; AU 2003229765 A 20030502; DE 10220282 A 20020507; DE 50301115 T 20030502; EP 03722586 A 20030502; ES 03722586 T 20030502; JP 2004503673 A 20030502; US 51376705 A 20050824