HIGH-SILICON ELECTRICAL STEEL SHEET EXCELLENT IN ASSEMBLY WORKABILITY

PROBLEM TO BE SOLVED: To provide a high-silicon electrical steel sheet excellent in assembly workability, which is manufactured by a rolling method and causes no rupture in an inserting step. SOLUTION: The high-silicon electrical steel sheet is obtained by forming an insulating film on the surface of a high-silicon steel sheet of 4-7 mass % content manufactured by a rolling method, based on the following findings: the occurrence of rupture in steel sheet at the assembly of a core using a high- silicon electrical steel sheet manufactured by a rolling method is caused by the inferior sliding property of the high-silicon steel sheet; and it is effective for improving this sliding property, to control the surface roughness of the steel sheet and the thickness of an insulating film to values in specific ranges, respectively. In the steel sheet, surface roughness Ra is >=0.10 μm and the average thickness of the insulating film is