摘要 |
A grain oriented electromagnetic steel sheet is free from an undercoating mainly composed of forsterite (Mg<SUB>2</SUB>SiO<SUB>4</SUB>), excellent in processability and magnetic properties and useful to production cost, and has a composition containing, by % by mass, 2.0 to 8.0% of Si, wherein secondary recrystallized grains contains fine crystal grains having a grain diameter of 0.15 mm to 0.50 mm at a rate of 2 grains/cm<SUP>2 </SUP>or more. In the process of producing the steel sheet, inhibitors are not utilized, and the fine crystal grains are achieved by high purification and low temperature final annealing.
|