Process for producing grain-oriented silicon steel strip

Details Process for producing grain-oriented silicon steel strip Process for producing grain-oriented silicon steel strip

1980-05-15

1982-07-13

Sheehan, John P.

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

148 12A, H01F 104

Patent

active

043392873

ABSTRACT:
In a process for the production of a grain-oriented silicon steel strip, a slab is heated, hot-rolled, cold-rolled, and subjected to a decarburization annealing and secondary recrystallization annealing steps. Grain coarsening is likely to occur during the high temperature heating and remain in the final product as streaks. The secondary recrystallization is, therefore, incomplete due to the streaks. In the hot rolling, an asymmetric flow, is applied to the steel, so as to eliminate the streaks and, hence, to obtain excellent magnetic properties.

REFERENCES:
patent: 1313054 (1919-08-01), Berry
patent: 1898061 (1933-02-01), Otte
patent: 2234968 (1941-03-01), Hayes et al.
patent: 3647575 (1972-03-01), Fiedler et al.
patent: 3764406 (1973-10-01), Littmann
patent: 3990923 (1976-11-01), Takashina et al.
patent: 4108694 (1978-08-01), Shiozaki et al.

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