Method for producing a grain-oriented electrical steel sheet hav

Details Method for producing a grain-oriented electrical steel sheet hav Method for producing a grain-oriented electrical steel sheet hav

1987-01-09

1989-09-05

Sheehan, John P.

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

148113, H01F 104

Patent

active

048635316

ABSTRACT:
Method for subdividing the magnetic domains of a grain-oriented electrical steel sheet is improved so that the watt loss can be further lessened and the watt-loss improving effect does not disappear during stress relief annealing. An intrudable means is formed on the finishing-annealed steel sheet on or in the vicinity of strain which promotes the intrusion of an intrudable means. Sb or Sb containing material is a preferred intrudable means and the laser irradiation is a preferred method for imparting the strain and also for attaining the removal of a surface coating.

REFERENCES:
patent: 3990923 (1976-11-01), Takashina et al.
patent: 4203784 (1980-05-01), Kuroki et al.
patent: 4363677 (1982-12-01), Ichiyama et al.
patent: 4548656 (1985-10-01), Kimoto et al.
patent: 4554029 (1985-11-01), Schoen et al.

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