Method of producing extra-low iron loss grain oriented silicon s

Details Method of producing extra-low iron loss grain oriented silicon s Method of producing extra-low iron loss grain oriented silicon s

1987-09-10

1990-03-20

Sheehan, John P.

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

148111, 148120, 148122, 21912119, 21912135, H01F 104

Patent

active

049098640

ABSTRACT:
An extra-low iron loss grain oriented silicon steel sheet is produced by irradiating electron beam to an insulation coating formed on a grain oriented silicon steel sheet after finish annealing in a direction crossing the rolling direction of the sheet, whereby the magnetic properties are not degraded even if the steel sheet is subjected to a strain relief annealing. If necessary, an inert gas may be introduced into the vicinity of electron beam irradiated zone of the coating.

REFERENCES:
patent: 3325620 (1967-06-01), Hunt et al.
patent: 3985583 (1976-10-01), Shimanaka et al.
patent: 4554029 (1985-11-01), Schoen et al.
patent: 4652316 (1987-03-01), Beckley
patent: 4713123 (1987-12-01), Inokuti et al.
patent: 4750949 (1988-07-01), Kobayashi et al.

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