Method of producing grain oriented silicon steel sheets having i

Details Method of producing grain oriented silicon steel sheets having i Method of producing grain oriented silicon steel sheets having i

1991-02-15

1992-07-07

Dean, Richard O.

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

148112, 148113, 20412943, H01F 104

Patent

active

051279711

ABSTRACT:
The production of grain oriented silicon steel sheets comprises a combination of hot rolling step, cold rolling step, decarburization and primary recrystallization annealing step, annealing separator applying step and secondary recrystallization annealing and purification annealing step. In this case, the cold rolled sheet is subjected to an electrolytic degreasing in a silicate bath containing an iron concentration of 50-5000 mg/l, and Cu is adhered to the surface(s) of the sheet after the decarburization and primary recrystallization annealing in an amount of 400-2000 mg/m.sup.2 per one-side surface.

REFERENCES:
patent: 4178194 (1979-12-01), Atterri et al.
patent: 4642141 (1987-02-01), Iida et al.
patent: 4975127 (1990-12-01), Kurosawa et al.

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