EP 0732413 B1 20010926 - Process for manufacturing grain oriented electrical steel sheets for transformers
Title (en)
Process for manufacturing grain oriented electrical steel sheets for transformers
Title (de)
Verfahren zum Herstellen von kornorientierten Elektrostahlblechen für Transformatoren
Title (fr)
Procédé de fabrication d'une tôle d'acier électrique à grains orientés notamment pour transformateurs
Publication
Application
Priority
FR 9502916 A 19950314
Abstract (en)
[origin: EP0732413A1] Electrical steel sheet is made by concasting steel of composition in wt. %:- 0.02-0.09 C; 2.5-4 Si; 0.027-0.17 Mn; 0.007-0.02 S; 0.01-0.03 Al; 0.004-0.012 N; 0.06-5 Cu; balance Fe and impurities. The concast slab or strip is reheated to 1200-1300 deg. C before being hot rolled to a thickness of 1-5 mm and then coiled at 500-700 deg. C. The strip is then cold rolled to below 0.5 mm, annealed to produce a primary recrystallisation and a decarburisation in a moist atmosphere and then coated with MgO. Finally it is annealed to produce a secondary recrystallisation and coated with an insulation layer which is fired.
IPC 1-7
IPC 8 full level
C21D 8/12 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/16 (2006.01)
CPC (source: EP KR)
C21D 6/008 (2013.01 - KR); C21D 8/1205 (2013.01 - EP KR); C21D 8/1222 (2013.01 - EP KR); C21D 8/1233 (2013.01 - KR); C21D 8/1255 (2013.01 - KR); C21D 8/1272 (2013.01 - KR); C21D 8/1283 (2013.01 - KR); C22C 38/02 (2013.01 - EP KR); C21D 8/1227 (2013.01 - EP); C21D 8/1266 (2013.01 - EP); C21D 8/1283 (2013.01 - EP)
Designated contracting state (EPC)
AT BE CH DE DK ES FI FR GB GR IE IT LI LU NL PT SE
DOCDB simple family (publication)
EP 0732413 A1 19960918; EP 0732413 B1 20010926; AT E206171 T1 20011015; BR 9605937 A 19970812; CN 1148411 A 19970423; CZ 284873 B6 19990317; CZ 368496 A3 19970416; DE 69615429 D1 20011031; DE 69615429 T2 20020620; ES 2161988 T3 20011216; FR 2731713 A1 19960920; FR 2731713 B1 19970411; JP H10500454 A 19980113; KR 970702932 A 19970610; PL 317155 A1 19970317; PT 732413 E 20020328; WO 9628576 A1 19960919
DOCDB simple family (application)
EP 96400486 A 19960308; AT 96400486 T 19960308; BR 9605937 A 19960308; CN 96190188 A 19960308; CZ 368496 A 19960308; DE 69615429 T 19960308; ES 96400486 T 19960308; FR 9502916 A 19950314; FR 9600364 W 19960308; JP 52732596 A 19960308; KR 19960706379 A 19961111; PL 31715596 A 19960308; PT 96400486 T 19960308