Method of manufacturing an oriented silicon steel sheet having i

Details Method of manufacturing an oriented silicon steel sheet having i Method of manufacturing an oriented silicon steel sheet having i

1991-09-10

1992-08-18

Dean, R.

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

148112, 148624, C21D 800

Patent

active

051395827

ABSTRACT:
A method of manufacturing an oriented silicon steel sheet improved in magnetic characteristics, in which a hot-rolled steel sheet of oriented silicon steel containing about 0.01 to 0.10% by weight of Al and about 0.01 to 0.04% by weight of Sb as inhibitor components is heat-treated and cold-rolled one time or two or more times to have a final thickness. In the final heat treatment and final cold rolling alone, the steel sheet is quenched from a temperature of about 900.degree. to 1,100.degree. C. to a temperature equal to or lower than about 50.degree. C., is heat-treated at about 50.degree. to 150.degree. C. for about 30 sec. to 30 min. while applying a tensile stress of about 0.5 to 20 kg/mm.sup.2, is thereafter cold-rolled by a reduction rate of about 35 to 70% in a tandem rolling method, is aged at about 200.degree. to 400.degree. C. for about 10 sec. to 10 min., and is finished by cold rolling to have the final thickness.

REFERENCES:
patent: 4269634 (1981-05-01), Foster et al.
patent: 4318758 (1982-03-01), Kuroki et al.

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