Grain-oriented electrical steel sheet and method for forming insulating coating

Abstract

The grain-oriented electrical steel sheet includes: a base steel sheet; and an insulating coating formed on a surface of the base steel sheet, in which the insulating coating includes: an intermediate layer that is formed on a side of the base steel sheet and contains a crystalline metal phosphate; and a tension coating layer formed on a surface side of the insulating coating, and when an interface between the base steel sheet and the intermediate layer is observed with a scanning electron microscope at a magnification of 5000 in a cross section along a thickness direction of the intermediate layer, the ratio of an interface length L to a width W of analyzing image is 100.0 to 120.0%.

Dependencies are inferred from the claim text.