Process for producing grain-oriented electromagnetic steel strip

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

1981-04-21

1983-09-27

Sheehan, John P.

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

148120, 148 12A, H01F 104

Patent

active

044067151

ABSTRACT:
In a process for the production of a grain-oriented electromagnetic 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 order to remove this disadvantage, the work piece is subjected to at least two rolling passes, wherein the high circumferential speed roll of one pair of the rolls and the low circumferential speed roll of another pair of the rolls are arranged on the same side of the work piece.

REFERENCES:
patent: 1313054 (1919-08-01), Berry
patent: 1896061 (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.
patent: 4339287 (1982-07-01), Matsumoto et al.

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