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AssigneeNippon Steel Corporation
InventorsYoshiyuki Ushigami, Shinji Yamamoto, Fumiaki Takahashi, Hideyuki Hamamura, Shinsuke Takatani, Masaru Takahashi
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The grain-oriented electrical steel sheet according to the present invention is a grain-oriented electrical steel sheet having a base steel sheet (1), an intermediate layer (4) disposed to be in contact with the base steel sheet (1), and an insulation coating (3) disposed to be in contact with the intermediate layer (4), and the grain-oriented electrical steel sheet includes a surface of the base steel sheet (1) having a groove (G) which extends in a direction intersecting a rolling direction of the base steel sheet (1), in which in a cross-sectional view of a plane parallel to the rolling direction and a sheet thickness direction of the base steel sheet (1), when a region between end portions of the groove (G) is defined as a groove part (RG), an average thickness of the intermediate layer (4) of the groove part (RG) is 0.5 times or more and 3.0 times or less an average thickness of the intermediate layer (4) other than the groove part (RG), and an area ratio of voids in the insulation coating (3) of the groove part (RG) is 15% or less.
A grain-oriented electrical steel sheet having a base steel sheet, an intermediate layer having silicon oxide as a main component disposed to be in contact with the base steel sheet, and an insulation coating disposed to be in contact with the intermediate layer, the grain-oriented electrical steel sheet comprising:
Dependencies are inferred from the claim text.