Patent ID: 10604848

Abstract:
An electrical steel sheet (1) includes a base material (2) of electrical steel, and an insulating film (3) formed on a surface of the base material (2). Three conditions (1.8≤3[Fe]/[P]+ΣnM[M]/[P]≤3.6, 0.6≤ΣnM[M]/[P]≤2.4, and 0.6≤3[Fe]/[P]≤2.4) are satisfied in a region of 50 area % or more of a cross section parallel to a thickness direction of the insulating film. [Fe] denotes a proportion (atom %) of Fe, [P] denotes a proportion (atom %) of P, [M] denotes a proportion (atom %) of each of Al, Zn, Mg and Ca, and nM denotes a valence of each of Al, Zn, Mg and Ca.