Method for manufacturing grain-oriented electrical steel sheet and manufacturing apparatus of grain-oriented electrical steel sheet
AssigneeNippon Steel Corporation
InventorsHideyuki HAMAMURA, Masato YASUDA, Kimihiko SUGIYAMA
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Abstract
The present method for manufacturing a grain-oriented electrical steel sheet includes: an oil removal step of removing an oil adhered to a surface of a cold-rolled steel sheet during rolling; a laser irradiation step of irradiating the surface of the cold-rolled steel sheet from which the oil is removed, with a laser beam to form a groove after the oil removal step; and a decarburization annealing step of decarburization-annealing the cold-rolled steel sheet on which the groove is formed, after the laser irradiation step.
Claims6
A method for manufacturing a grain-oriented electrical steel sheet, the method comprising:
- an oil removal step of removing an oil adhered to a surface of a cold-rolled steel sheet during rolling;
- a laser irradiation step of irradiating the surface of the cold-rolled steel sheet from which the oil is removed, with a laser beam to form a groove after the oil removal step;
- and
- a decarburization annealing step of decarburization-annealing the cold-rolled steel sheet on which the groove is formed, after the laser irradiation step.
A manufacturing apparatus of a grain-oriented electrical steel sheet, the manufacturing apparatus comprising:
- an oil removal device configured to remove an oil adhered to a surface of a cold-rolled steel sheet during rolling;
- a laser irradiation device configured to irradiate the surface of the cold-rolled steel sheet from which the oil is removed, with a laser beam to form a groove;
- and
- a decarburization annealing device configured to decarburization-anneal the cold-rolled steel sheet on which the groove is formed.
Dependencies are inferred from the claim text.