Method for providing heat resistant domain refinement of electrical steels to reduce core loss.

摘要

A method is provided for heat resistant domain refinement of texture annealed and insulation coated grain-oriented silicon steel sheet or strip and amorphous magnetic materials by subjecting at least one surface of the steel to an electron beam treatment to produce permanent defects to effect domain refinement with narrow substantially parallel bands of treated regions separated by untreated regions substantially transverse to the direction of sheet or strip manufacture.