Method for producing electrical steel sheets having a very high

Details Method for producing electrical steel sheets having a very high Method for producing electrical steel sheets having a very high

1973-11-23

1976-01-20

Satterfield, Walter R.

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

148111, 148 3155, 75123A, 75123L, H01F 104

Patent

active

039335372

ABSTRACT:
Electrical steel sheets having a very high magnetic induction are produced by a method in which an electrical steel raw material is hot rolled and annealed and subjected to at least one cold rolling and to a decarburizing annealing and a final annealing to develop the secondary recrystallized grains of (110) [001] orientation characterized in that the raw material contains less than 4.5% of Si, less than 0.06% of C, 0.005-0.100% of Sb and 0.01-0.05% of Al in the electrical steel raw material prior to the hot rolling, annealing at a temperature of 750.degree. - 1,200.degree.C depending upon the Si content before the final cold rolling, final cold rolling at a reduction rate of 40 - 89% and fully developing the secondary recrystallized grains at a temperature range of 800.degree. - 950.degree.C in the final annealing, are carried out in the above described order.

REFERENCES:
patent: 2209686 (1940-07-01), Crafts
patent: 3096222 (1963-07-01), Fiedler
patent: 3671337 (1972-06-01), Kumai et al.
patent: 3764406 (1973-10-01), Littmann
patent: 3841924 (1974-10-01), Sakakura et al.
patent: 3853641 (1974-12-01), Sakakura et al.
Saito, T; Effect of Minor Elements on Grain Growth; in Nihon Kinzoku, 27 (4) 1963 pp. 186-191.

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