Grain-oriented electrical steel sheet

Abstract

An grain-oriented electrical steel sheet according to the present invention includes: a base steel sheet; an oxide layer that is formed on the base steel sheet and is formed of amorphous SiO2; and a tension-insulation coating that is formed on the oxide layer. The base steel sheet includes, as a chemical composition, by mass %, C: 0.085% or less, Si: 0.80% to 7.00%, Mn: 1.00% or less, acid-soluble Al: 0.065% or less, Seq represented by S+0.406·Se: 0.050% or less, and a remainder consisting of Fe and unavoidable impurities. FWHM that is a half width of a peak of cristobalite type aluminum phosphate obtained by X-ray diffraction satisfies (i) when X-ray diffraction is performed using a Co-Kα excitation source, a half width (FWHM-Co) of a peak appearing at 2θ=24.8° is 2.5 degree or less, or (ii) when X-ray diffraction is performed using a Cu-Kα excitation source, a half width (FWHM-Cu) of a peak appearing at 2θ=21.3° is 2.1 degree or less.

Dependencies are inferred from the claim text.