ORIENTED ELECTROMAGNETIC STEEL PLATE.

摘要

Provided is an oriented electromagnetic steel plate with a magnetic domain structure that has been changed by the introduction of a distortion without traces of processing, and wherein noise generated when said oriented electromagnetic steel plate is used laminated on a transformer iron core is effectively suppressed by: setting a magnetic flux density (B8) to 1.92 T or greater; then setting the ratio between an average magnetic domain width (W0) prior to distortion-introducing processing and the average magnetic domain width (Wa) of a processing surface after distortion-introducing processing to Wa/W0<0.4; setting the ratio between an average magnetic domain width (Wb) in an unprocessed surface and Wa to Wa/Wb>0.7; setting the ratio between an average width (Wc) for a magnetic domain non-continuous section in the processing surface as a result of distortion-introduction processing and an average width (Wd) for the magnetic domain non-continuous section in the unprocessed surface to Wd/Wc>0.8; and setting Wc<0.35.