NON-ORIENTED SILICON STEEL SHEET HAVING EXCELLENT CORE LOSS AND ITS PRODUCTION METHOD

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PROBLEM TO BE SOLVED : To provide a non-oriented silicon steel sheet capable of being made low in core loss by sufficiently coarse-growing crystal grains even when an annealing after blanking is performed at a lower temperature in a shorter time. SOLUTION : In this non-oriented silicon steel sheet, the piece density of inclusions with a diameter of the equivalent sphere of 0 (1).