ORIENTED ELECTROMAGNETIC STEEL SHEET EXCELLING IN MAGNETIC CHARACTERISTICS AND COATING ADHESION

摘要

There is provided a grain-oriented electrical steel sheet stably having excellent magnetic characteristics and coating adhesion even when a rapid heating is conducted in a primary recrystallization annealing (decarburization annealing). Concretely, it is a grain-oriented electrical steel sheet provided on its sheet surface with a tension-applying type insulation coating constituted with a coating layer A formed on a steel sheet side and mainly composed of an oxide and a coating layer B formed on a surface side and mainly composed of glass, characterized in that a ratio R (à B /à A ) of a tension à B of the coating layer B on the surface side applied to the steel sheet to a tension à A of the coating layer on the steel sheet side A applied to the steel sheet is within a range of 1.20-4.0.