Annealing separator used in the finishing annealing step for pro

Details Annealing separator used in the finishing annealing step for pro Annealing separator used in the finishing annealing step for pro

1986-04-04

1986-12-30

Sheehan, John P.

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

148 27, 148 28, 501 96, 501108, H01F 104

Patent

active

046327088

ABSTRACT:
An annealing separator used in a finishing annealing step for producing a grain-oriented electrical steel sheet usually contains magnesia. The present invention is characterized by including, based on 100 parts by weight of magnesia, from 0.2 to 20 parts by weight of ferromanganese nitride or manganese nitride which consists of a composition (Mn.sub.1-x Fe.sub.x)N.sub.y having x and y values corresponding to A, B, C, and D and falling within a region surrounded by A, B, C, and D shown in the appended FIG. 1.
The annealing separator according to the present invention is effective for stabilizing secondary recrystallization and improving the properties of a forsterite film.

REFERENCES:
patent: 3941622 (1976-03-01), Lee et al.
patent: 4113530 (1978-09-01), Shimanaka et al.
patent: 4482401 (1984-11-01), Miller
patent: 4512823 (1985-04-01), Howe

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