Grain oriented electrical steel sheet
AssigneeJfe Steel Corporation
InventorsMinoru Takashima, Hirotaka Inoue, Seiji Okabe
Life of this patent
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Abstract
A grain oriented electrical steel sheet has grooves on one surface of the steel sheet formed for magnetic domain refining, the steel sheet including a forsterite film and a tension coating on front and back surfaces of the steel sheet, wherein the tension coating is applied on a surface with the grooves in a coating amount A (g/m2) and is applied on a surface with no grooves in a coating amount B (g/m2), the coating amounts A and B satisfying (1) and (2): 3≦A≦8 (1); and 1.0<B/A≦1.8 (2).
Claims2
A grain oriented electrical steel sheet having grooves on one surface of the steel sheet formed for magnetic domain refining, the steel sheet comprising a forsterite film and a tension coating containing silica and phosphate on front and back surfaces of the steel sheet,
- wherein either one of the front and the back surfaces is provided with the grooves and another of the front and back surfaces is not provided with the grooves;
- and
- wherein the tension coating is applied on a surface with the grooves in a coating amount A (g/m2), and is applied on the other surface with no grooves in a coating amount B (g/m2), the coating amounts A and B satisfying (1) and (2):
- 3≦A≦8 (1);
- and
- 1.0<B/A≦1.8 (2).
Dependencies are inferred from the claim text.