EP 0469980 B1 19960710 - Process for manufacturing grain non oriented magnetic steel sheet and sheet obtained thereby
Title (en)
Process for manufacturing grain non oriented magnetic steel sheet and sheet obtained thereby
Title (de)
Verfahren zur Herstellung nichtkornorientierter magnetischer Stahlbleche und also erhaltene Stahlbleche
Title (fr)
Procédé de fabrication de tÔle d'acier magnétique à grains non orientés et tÔle obtenue par ce procédé
Publication
Application
Priority
FR 9009694 A 19900730
Abstract (en)
[origin: EP0469980A1] This process, comprising successively after production under vacuum of a steel with a low silicon content: - a hot rolling operation followed by reeling; - a shot-blasting and pickling operation: - a cold rolling operation in one or more stages followed by annealing, to obtain a sheet of the final thickness, the final annealing being carried out under a decarbonising controlled atmosphere, is characterised in that the steel sheet has the following composition by weight: - carbon < 0.008% - silicon < 0.4% - manganese (0.05-0.4)% - sulphur < 0.01% - phosphorus < 0.19% - nitrogen < 0.01% - oxygen < 0.01%, the reeling following the hot rolling is carried out at a temperature above 600 DEG C and is itself followed by a heat treatment at a temperature above 700 DEG C.
IPC 1-7
IPC 8 full level
C21D 8/12 (2006.01)
CPC (source: EP)
C21D 8/1222 (2013.01); C21D 8/1261 (2013.01)
Citation (examination)
- EP 0434641 A2 19910626 - SVILUPPO MATERIALI SPA [IT]
- EP 0263413 A2 19880413 - NIPPON KOKAN KK [JP]
- GB 2057500 A 19810401 - BRITISH STEEL CORP
- Patent Abstracts of Japan, vol. 12 no. 155 (C-494),12.05.88, & JP-A-62 267 421
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
EP 0469980 A1 19920205; EP 0469980 B1 19960710; AT E140271 T1 19960715; DE 69120738 D1 19960814; DE 69120738 T2 19961121; DK 0469980 T3 19961118; ES 2091889 T3 19961116; FR 2665181 A1 19920131; FR 2665181 B1 19940527; GR 3020930 T3 19961231
DOCDB simple family (application)
EP 91402117 A 19910729; AT 91402117 T 19910729; DE 69120738 T 19910729; DK 91402117 T 19910729; ES 91402117 T 19910729; FR 9009694 A 19900730; GR 960402287 T 19960903