EP 4365319 A1 20240508 - GRAIN-ORIENTED ELECTRICAL STEEL STRIP AND METHOD FOR ITS PRODUCTION
Title (en)
GRAIN-ORIENTED ELECTRICAL STEEL STRIP AND METHOD FOR ITS PRODUCTION
Title (de)
KORNORIENTIERTES ELEKTROBAND UND VERFAHREN ZU DESSEN HERSTELLUNG
Title (fr)
BANDE D'ACIER ÉLECTRIQUE À GRAINS ORIENTÉS ET SON PROCÉDÉ DE FABRICATION
Publication
Application
Priority
EP 22205409 A 20221103
Abstract (en)
The invention relates to a grain-oriented electrical steel sheet having a peak magnetic polarization of ≥ 1.3 T at an external field of 100 A/m and an excitation of 1000 Hz and comprising: a cold-rolled steel core layer consisting of Fe, Si and optionally further alloying elements, the steel core layer having two outer surfaces, a forsterite layer on at least one of the two outer surfaces of the cold-rolled steel core layer wherein the grain-oriented electrical steel sheet has a bending radius of 9 mm or less, determined using a taper mandrel bending device and bending a specimen of the grain oriented electrical steel continuously 180° around a taper mandrel with a taper base of 30 mm and a taper tip of 5 mm, the bending radius being the radius at which visible cracks appear in the grain-oriented electrical steel sheet. The invention further relates to a method of producing a grain-oriented electrical steel sheet of the invention, to laminated stacks of grain-oriented electrical steel sheets, wherein the stack comprises at least two grain-oriented electrical steel sheets according to the invention laminated together with a resin and to the use of the grain-oriented electrical steel sheet of the invention as material for the production of parts for electric motors, for electric transformers or for other electric devices.
IPC 8 full level
C21D 8/12 (2006.01); C21D 9/46 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/20 (2006.01)
CPC (source: EP)
C21D 8/1233 (2013.01); C21D 8/1272 (2013.01); C21D 8/1283 (2013.01); C21D 9/46 (2013.01); C22C 38/004 (2013.01); C22C 38/008 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/20 (2013.01)
Citation (applicant)
- DE 2247269 C3 19810514
- DE 102015012172 A1 20170323 - UNIV KASSEL [DE]
- DE 102008008781 A1 20090820 - THYSSENKRUPP ELECTRICAL STEEL EBG GMBH [DE]
- US 3948786 A 19760406 - EVANS JAMES D
- JP S5328375 B2 19780814
- DE 19745445 C1 19990708 - THYSSENKRUPP STAHL AG [DE]
- EP 1752549 B1 20160120 - THYSSENKRUPP STEEL EUROPE AG [DE]
- WO 2007014868 A1 20070208 - THYSSENKRUPP STEEL AG [DE], et al
- WO 9919521 A1 19990422 - THYSSENKRUPP STAHL AG [DE], et al
- EP 2902509 B1 20180829 - THYSSENKRUPP ELECTRICAL STEEL GMBH [DE]
- EP 2954095 A1 20151216 - THYSSENKRUPP ELECTRICAL STEEL GMBH [DE], et al
- EP 2675927 A1 20131225 - THYSSENKRUPP ELECTRICAL STEEL GMBH [DE]
- N. CHEN ET AL., ACTA MATERIALIA, vol. 51, 2003, pages 1755 - 1765
- K. GUNTHER ET AL., JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, vol. 320, 2008, pages 2411 - 2422
Citation (search report)
- [XI] EP 3517646 A1 20190731 - JFE STEEL CORP [JP]
- [I] EP 3214188 A1 20170906 - JFE STEEL CORP [JP]
- [I] EP 3584331 A1 20191225 - JFE STEEL CORP [JP]
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 ME MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
DOCDB simple family (application)
EP 23207333 A 20231102