EP 0998587 B1 20010228 - METHOD FOR PRODUCING GRAIN ORIENTED ELECTRIC SHEETS
Title (en)
METHOD FOR PRODUCING GRAIN ORIENTED ELECTRIC SHEETS
Title (de)
VERFAHREN ZUR HERSTELLUNG VON KORNORIENTIERTEM ELEKTROBLECH
Title (fr)
PROCEDE DE FABRICATION DE TOLES ELECTRIQUES A GRAINS ORIENTES
Publication
Application
Priority
- DE 19735062 A 19970813
- EP 9805008 W 19980806
Abstract (en)
[origin: WO9909221A1] The invention relates to a method for producing grain oriented electric sheets. In this method, a steel slab is first of all heated to a temperature below the solubility temperature of manganese sulphide but above the solubility temperature of copper sulphide, then heated through and finally hot-rolled at an initial temperature of at least 960 DEG C and a final temperature of 880-1000 DEG C, until a final thickness of the hot-rolled sheet of 1.5-7.0nm is obtained. The hot-rolled sheet is then annealed for 100-600s at a temperature of 880-1150 DEG C, cooled and cold-rolled. The cold-rolled band is annealed, during which decarbonization and recrystallization take place. After applying an MgO-containing separating agent, the cold-rolled band is annealed at high temperature, and, after applying an insulating coating, subjected to final annealing. The invention is characterized in that a steel slab with fine grain globulite structure is used, in which at least 90 % of the grains have a diameter of not more than 1/25 of the slab thickness, and an extension factor of at least 0.5.
IPC 1-7
IPC 8 full level
CPC (source: EP KR)
C21D 6/008 (2013.01 - KR); C21D 8/1205 (2013.01 - EP); C21D 8/1211 (2013.01 - KR); C21D 8/1222 (2013.01 - EP KR); C21D 8/1233 (2013.01 - KR); C21D 8/1255 (2013.01 - KR); C21D 8/1261 (2013.01 - KR); C21D 8/1272 (2013.01 - KR); C21D 8/1283 (2013.01 - KR); C22C 38/02 (2013.01 - KR); C21D 3/04 (2013.01 - EP); C21D 8/1261 (2013.01 - EP)
Designated contracting state (EPC)
AT BE DE ES FI FR GB IT NL SE
DOCDB simple family (publication)
WO 9909221 A1 19990225; AT E199403 T1 20010315; BR 9811935 A 20000829; DE 19735062 A1 19990218; DE 59800501 D1 20010405; EP 0998587 A1 20000510; EP 0998587 B1 20010228; ES 2156033 T3 20010601; KR 20010022777 A 20010326
DOCDB simple family (application)
EP 9805008 W 19980806; AT 98945171 T 19980806; BR 9811935 A 19980806; DE 19735062 A 19970813; DE 59800501 T 19980806; EP 98945171 A 19980806; ES 98945171 T 19980806; KR 20007001377 A 20000210