EP 0753588 A1 19970115 - Method for producing a grain-oriented electrical steel sheet having a mirror surface and improved core loss
Title (en)
Method for producing a grain-oriented electrical steel sheet having a mirror surface and improved core loss
Title (de)
Herstellungsverfahren eines kornorientiertes Elektrostahlbleches mit einer Spiegeloberfläche und mit geringen Eisenverlusten
Title (fr)
Procédé pour la fabrication d'une tÔle d'acier électrique à grains orientés ayant une surface miroir et une faible perte dans le fer
Publication
Application
Priority
EP 95111069 A 19950714
Abstract (en)
Disclosed is a method for producing a grain-oriented electrical steel sheet having mirror surface containing 0.8 to 4.8% of Si in the form of a strip which has been subjected to a conventional series of operations including hot rolling with or without annealing, cold rolling once or at least twice with intermediate annealing to obtain a final thickness, decarburization annealing with or without nitriding treatment, coating the steel sheet with an annealing separator mainly containing non-hydrating oxide and final annealing, the improvement comprising: satisfying the relationship <MATH> where ÄAÜ is the total concentration of alkali metal impurity in the annealing separator (weight %), and ÄOÜ is the amount of oxygen contained in the steel sheet just prior to the final annealing (g/m<2>). <IMAGE>
IPC 1-7
IPC 8 full level
C21D 8/12 (2006.01); C22C 38/02 (2006.01)
CPC (source: EP)
C21D 8/1283 (2013.01); C22C 38/02 (2013.01)
Citation (search report)
- [A] EP 0305966 A1 19890308 - NIPPON STEEL CORP [JP]
- [A] EP 0607440 A1 19940727 - NIPPON STEEL CORP [JP]
- [AD] US 3785882 A 19740115 - JACKSON J
- [A] PATENT ABSTRACTS OF JAPAN vol. 18, no. 226 (C - 1194) 25 April 1994 (1994-04-25)
- [AD] PATENT ABSTRACTS OF JAPAN vol. 9, no. 166 (C - 290) 11 July 1985 (1985-07-11)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0753588 A1 19970115; EP 0753588 B1 19991208; EP 0753588 B2 20050427; DE 69513811 D1 20000113; DE 69513811 T2 20000427; DE 69513811 T3 20050922
DOCDB simple family (application)
EP 95111069 A 19950714; DE 69513811 T 19950714