EP 1506320 A1 20050216 - NON-GRAIN ORIENTED ELECTRICAL STEEL STRIP OR ELECTRICAL STEEL SHEET AND METHOD FOR PRODUCING THE SAME
Title (en)
NON-GRAIN ORIENTED ELECTRICAL STEEL STRIP OR ELECTRICAL STEEL SHEET AND METHOD FOR PRODUCING THE SAME
Title (de)
NICHTKORNORIENTIERTES ELEKTROBAND ODER -BLECH UND VERFAHREN ZU SEINER HERSTELLUNG
Title (fr)
TOLE OU FEUILLARD MAGNETIQUE A GRAINS NON ORIENTES ET PROCEDE POUR SA PRODUCTION
Publication
Application
Priority
- DE 10221793 A 20020515
- EP 0305114 W 20030515
Abstract (en)
[origin: WO03097884A1] The invention relates to non-grain oriented electrical steel sheets that can be produced as finally annealed or as not finally annealed sheets in such a manner that they have improved magnetic polarization values and reduced magnetic losses as compared to values so far obtained. For this purpose, when a steel having a suitable composition is cooled off, it is subjected to a temperature range, starting from an initial temperature of not more than 1300 DEG C and with the substantially complete exception of a purely austenitic microstructure ( gamma phase). In said temperature range, the steel has a austenite/ferrite two-phase mixed structure ( alpha and gamma mixed phases) so that the electrical steel sheet, after hot rolling, pickling, cold rolling and annealing of the hot-rolled strip obtained after hot rolling has a magnetic polarization J2500 >/= 1.74 T measured in the longitudinal orientation of the strip or sheet at a magnetic field strength of 2500 A/m and a value P1.5 (50) of the magnetic losses of < 4.5 W/kg measured in the longitudinal orientation of the strip at J = 1.5 T and at a frequency f = 50 Hz.
IPC 1-7
IPC 8 full level
C21D 8/12 (2006.01); C22C 38/00 (2006.01); C22C 38/06 (2006.01); C22C 38/16 (2006.01); H01F 1/147 (2006.01); H01F 1/16 (2006.01); C21D 8/02 (2006.01)
CPC (source: EP KR US)
C21D 8/12 (2013.01 - KR); C21D 8/1222 (2013.01 - EP US); H01F 1/14775 (2013.01 - EP US); C21D 8/0236 (2013.01 - EP US); C21D 8/0273 (2013.01 - EP US)
Citation (search report)
See references of WO 03097884A1
Designated contracting state (EPC)
AT DE ES FR IT SK
DOCDB simple family (publication)
WO 03097884 A1 20031127; AU 2003232780 A1 20031202; AU 2003232780 B2 20090702; CN 100363509 C 20080123; CN 1678762 A 20051005; DE 10221793 C1 20031204; EP 1506320 A1 20050216; JP 2005525469 A 20050825; KR 101059577 B1 20110826; KR 20050019715 A 20050303; US 2005247373 A1 20051110; US 7501028 B2 20090310
DOCDB simple family (application)
EP 0305114 W 20030515; AU 2003232780 A 20030515; CN 03815446 A 20030515; DE 10221793 A 20020515; EP 03752745 A 20030515; JP 2004505397 A 20030515; KR 20047018451 A 20030515; US 51498305 A 20050701