EP 2979281 B1 20190612 - ELECTRICAL STEEL SHEET WITH A COATING IMPROVING THE ELECTRICAL INSULATION AND METHOD OF ITS MANUFACTURE
Title (en)
ELECTRICAL STEEL SHEET WITH A COATING IMPROVING THE ELECTRICAL INSULATION AND METHOD OF ITS MANUFACTURE
Title (de)
ELEKTROBLECH MIT EINER DIE ELEKTRISCHE ISOLATION VERBESSERNDEN SCHICHT UND VERFAHREN ZU DESSEN HERSTELLUNG
Title (fr)
TÔLE D'ACIER ÉLECTRIQUE AVEC UN REVÊTEMENT POUR AMÉLIORER L'ISOLATION ÉLECTRIQUE ET PROCÉDÉ DE SA FABRICATION
Publication
Application
Priority
- DE 102013208617 A 20130510
- EP 2014057879 W 20140417
Abstract (en)
[origin: CA2911552A1] The invention relates to an electrical steel sheet (11) with a layer (14) improving the electrical insulation. According to the invention, this layer is formed from tantalum oxide or titanium oxide, wherein a diffusion zone (15) that is enriched with tantalum or titanium adjoins toward the interior of the electrical steel sheet (11). This has the advantage that the layer adheres better on the electrical steel sheet (11). Furthermore, the tantalum or titanium of the diffusion zone (15) can also be used as a depot, which has the effect of spontaneously passivating impairments of the layer (14). Therefore, corrosion protection is ensured even when there are impairments of said layer (14). The invention also relates to a method for producing an electrical steel sheet in the way described.
IPC 8 full level
C23C 10/28 (2006.01); C21D 1/74 (2006.01); C21D 8/12 (2006.01); C21D 9/46 (2006.01); C23C 8/02 (2006.01); C23C 8/10 (2006.01); C23C 10/60 (2006.01); H01F 1/18 (2006.01)
CPC (source: EP RU US)
C21D 1/74 (2013.01 - EP US); C21D 8/12 (2013.01 - RU); C21D 8/1277 (2013.01 - EP US); C21D 8/1283 (2013.01 - EP US); C21D 9/46 (2013.01 - EP US); C23C 8/02 (2013.01 - EP US); C23C 8/10 (2013.01 - EP US); C23C 10/00 (2013.01 - RU); C23C 10/28 (2013.01 - EP US); C23C 10/60 (2013.01 - EP RU US); H01F 1/16 (2013.01 - RU); H01F 1/18 (2013.01 - EP US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
DE 102013208617 A1 20141113; AU 2014264849 A1 20151119; AU 2014264849 B2 20161013; BR 112015027423 A2 20170725; CA 2911552 A1 20141113; CA 2911552 C 20171205; CN 105190794 A 20151223; CN 105190794 B 20181207; EP 2979281 A1 20160203; EP 2979281 B1 20190612; RU 2015148135 A 20170616; RU 2635501 C2 20171113; SA 515370121 B1 20180418; US 2016125986 A1 20160505; US 9959959 B2 20180501; WO 2014180646 A1 20141113
DOCDB simple family (application)
DE 102013208617 A 20130510; AU 2014264849 A 20140417; BR 112015027423 A 20140417; CA 2911552 A 20140417; CN 201480025470 A 20140417; EP 14721254 A 20140417; EP 2014057879 W 20140417; RU 2015148135 A 20140417; SA 515370121 A 20151109; US 201414890343 A 20140417