Silicon steel sheets having low iron loss and method of producing the same.

摘要

A silicon-containing steel sheet having a low iron loss has such a crystal structure that crystal grains having an inclination angle of {110} face of not more than 10 DEG with respect to the sheet surface are included in an amount of not less than 80 vol% and exhibit a graining surface pattern in which boundaries of these crystal grains form stepwise difference or groove of not less than 0.4 mu m as a maximum height. This sheet is produced by subjecting a grain oriented silicon steel sheet after final annealing to a magnetically smoothening treatment by electrolysis in an aqueous solution containing at least one of water soluble halides.