Grain-oriented electrical steel sheet and method for manufacturing the same (as amended)

Abstract

The present invention provides a grain-oriented electrical steel sheet with reduced iron loss over a wide range of sheet thickness by providing a grain-oriented electrical steel sheet with an actually measured sheet thickness t (mm) that includes a closure domain region extending linearly in a direction from 60° to 120° with respect to the rolling direction on a surface of the steel sheet, the closure domain region being formed periodically at a spacing s (mm) in the rolling direction, such that h≧74.9t+39.1 (0.26≧t), h≧897t−174.7 (t>0.26), (w×h)/(s×1000)≦−12.6t+7.9 (t>0.22), and (w×h)/(s×1000)≦−40.6t+14.1 (t≦0.22), where h (μm) is the depth and w (μm) is the width of the closure domain region.

Dependencies are inferred from the claim text.