GRAIN ORIENTED ELECTRICAL STEEL SHEET AND METHOD

摘要

Grain oriented electrical steel sheet witha very low iron loss and a method for producing the same, wherein the surface of the iron substrate of the grain oriented electrical steel sheet is subjected to an enhancement treatment of crystal grain orientation or surface smoothing to a mean roughness of about 0.20 .mu.m or less, electroplating a chromium et al plating layer on the substrate with heterogeneous growth, and applying a tension coating film to the plating layer.