POSCO Holdings Inc.
Grain-oriented electrical steel plate and manufacturing method thereof

Abstract:

A grain-oriented electrical steel plate of an exemplary embodiment of the present invention has a groove formed on a surface, wherein a curvature radius RBb at a position where a depth of the groove is maximum is 0.2 .mu.m to 100 .mu.m, and a curvature radius RSb on the groove surface from the position where the depth of the groove is maximum to a quarter-way position of the depth D of the groove is 4 .mu.m to 130 .mu.m.