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公开(公告)号：EP4365319A1
公开(公告)日：2024-05-08
申请号：EP23207333.8
申请日：2023-11-02
发明人： Hecht, Christian , Koop, Paul , Lahn, Ludger , Schick, Matthias , Aydin, Mustafa Seckin , Ligi, Guy , Blaszkowski, Jonathan , Merling, Sophie , Lewe, Tobias
CPC分类号： C22C38/004 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/20 , C21D8/1233 , C21D8/1272 , C21D8/1283 , C21D9/46
摘要： 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.
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