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公开(公告)号：EP3812478A1
公开(公告)日：2021-04-28
申请号：EP19822585.6
申请日：2019-06-21
发明人： KUMANO, Tomoji , YANO, Shinya , OKADA, Shingo , OGURI, Akio , MORIMOTO, Shota
摘要： Provided is a grain-oriented electrical steel sheet, the core loss characteristics of which have been significantly improved without causing a deterioration in magnetic flux density. The grain-oriented electrical steel sheet: comprises 2.5-3.5% by mass of Si with the balance being Fe and inevitable impurities; has a sheet thickness of 0.18-0.35 mm; has a metallographic structure including matrix grains of Goss-oriented secondary recrystallized grains after secondary-recrystallized annealing, wherein Goss-oriented crystal grains existing in the matrix and having a major (long) diameter of 5 mm or smaller exist in the metallographic structure at a frequency of 1.5 grains/cm 2 to 8 grains/cm 2 ; and has a magnetic flux density B8 of 1.88T or greater. As for the orientations of the Goss-oriented crystal grains having a major (long) diameter of 5 mm or smaller, the orientation of the Goss-oriented crystal grains deviate from the rolling direction by an angle of 7 degrees or smaller and by an angle of 5 degrees or smaller in terms of a simple average of an α angle and that of a β angle, respectively.
α angle; the angle formed by the longitudinal direction and the projection of the [001] on specimen surface, and
β angle; the tilt of the [001] out of the specimen surface
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