GRAIN-ORIENTED ELECTROMAGNETIC STEEL SHEET AND PROCESS FOR PRODUCING THE SAME

摘要

The present invention provides a grain-oriented electrical steel sheet produced by a method for promoting secondary recrystallization without an inhibitor, the grain-oriented electrical steel sheet including 2.0% or more and 4.5% or less of Si and 0.01% or more and 0.5% or less of Mn on a mass% basis, wherein the number of oxide particles having a diameter of 1 to 3 µm among that (oxide particles) of containing Ca and/or Mg is 400 or less per unit area (1 cm 2 ) in a transverse cross-section perpendicular to a rolling direction. Therefore, the grain-oriented electrical steel sheet has excellent stable magnetic properties throughout the length of a coil.