GRAIN ORIENTED SILICON STEEL PLATE AND PRODUCTION METHOD THEREOF

摘要

PROBLEM TO BE SOLVED: To propose a method for achieving further low iron loss by suppressing reduction of flux density in a magnetic domain fragmentation material having grooves, and controlling magnetic domain structure.SOLUTION: A grain oriented silicon steel plate is formed by providing a magnetic domain non-continuous part by groove formation on a surface of a grain silicon steel plate. A boundary line between the magnetic domain non-continuous part and magnetic domain continuous part has a wavy part having a basis of a curve whose curvature radius is 0.5 mm or less, and a period of the wavy part is 0.3 times or more and 1.0 time or less of maximum width of the magnetic domain non-continuous part.