ORIENTED MAGNETIC STEEL PLATE AND PRODUCTION METHOD FOR THE SAME

摘要

PROBLEM TO BE SOLVED: To provide an oriented magnetic steel plate with magnetic domain refinement by electron beam irradiation and which achieves excellent low-noise characteristics when assembled on an existing transformer.

SOLUTION: In the oriented magnetic steel plate, the ratio (Wa/Wb) between a film thickness (Wa) of a fosterite coating on a distortion introduction side of the steel plate and a film thickness (Wb) of the fosterite coating on a distortion non-introduction side is 0.5 or greater; the average width of a discontinuous section in a magnetic domain in the steel plate surface on the distortion introduction side is 150-300 [mu]m; and the average width of the discontinuous section in the magnetic domain in the steel plate surface on the distortion non-introduction side is 250-500 [mu]m.

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