Method for manufacturing grain-oriented electrical steel sheet
AssigneeJfe Steel Corporation
InventorsHiroi Yamaguchi, Takeshi Imamura, Takeshi Omura, Yoshihisa Ichihara
Life of this patent
Estimating the term…
Abstract
Provided is a method for manufacturing a grain-oriented electrical steel sheet to reduce iron loss by controlling the magnetic domain structure, in which the iron loss reduction effect can be maintained even when stress relief annealing is applied, and the magnetic flux density does not decrease after the magnetic domain control treatment. In the manufacturing method, on a surface of the grain oriented electrical steel sheet, a laser beam with a ring-shaped intensity distribution in which the intensity in a periphery is lower than that in a center is irradiated in a linear manner in a direction intersecting a rolling direction of the steel sheet.
Claims12
A method for manufacturing a grain-oriented electrical steel sheet, comprising, on a surface of the grain oriented electrical steel sheet, irradiating using a laser beam with a ring-shaped intensity distribution comprising a relatively lower intensity in a periphery and a relatively higher intensity in a center, wherein the irradiating is in a linear manner in a direction intersecting a rolling direction of the steel sheet.
Dependencies are inferred from the claim text.