EP 0392535 A2 19901017 - Process for preparation of grain-oriented electrical steel sheet having superior magnetic properties.
Title (en)
Process for preparation of grain-oriented electrical steel sheet having superior magnetic properties.
Title (de)
Verfahren zum Herstellen kornorientierter Elektrobleche mit verbesserten magnetischen Eigenschaften.
Title (fr)
Procédé pour produire de tÔle d'acier électrique à grain orienté possédant des caractéristiques magnétiques améliorées.
Publication
Application
Priority
- JP 9441289 A 19890414
- JP 9441389 A 19890414
Abstract (en)
A silicon steel slab comprising 0.05 to 0.8% by weight of Mn and up to 0.014% by weight of S + 0.405Se is heated at a temperature lower than 1280 DEG C and hot-rolled under such conditions that the hot rolling-finish temperature is 700 to 1150 DEG C, the cumulative reduction ratio at the final three passes is at least 40%, and the reduction ratio at the final pass is at least 20%, or this silicon steel slab is hot-rolled at a hot rolling-finish temperature of 750 to 1150 DEG C while adopting the above-mentioned reduction ratio according to need, is maintained at a temperature not lower than 700 DEG C for at least 1 second, and wound at a winding temperature lower than 700 DEG C. The hot-rolled sheet is subjected to the hot-rolled sheet annealing, finally cold-rolled at a reduction ratio of at least 80%, subjected to the decarburization annealing, and then subjected to the final finish annealing. According to this process, a grain-oriented electrical steel sheet having superior magnetic properties is obtained.
IPC 1-7
IPC 8 full level
C21D 8/12 (2006.01)
CPC (source: EP)
C21D 8/1222 (2013.01); C21D 8/1233 (2013.01)
Designated contracting state (EPC)
DE FR GB IT SE
DOCDB simple family (publication)
EP 0392535 A2 19901017; EP 0392535 A3 19920930; EP 0392535 B1 19950927; EP 0392535 B2 20021016; DE 69022617 D1 19951102; DE 69022617 T2 19960321; DE 69022617 T3 20030403
DOCDB simple family (application)
EP 90107030 A 19900412; DE 69022617 T 19900412