Process for producing a grain-oriented electrical steel sheet ha

Details Process for producing a grain-oriented electrical steel sheet ha Process for producing a grain-oriented electrical steel sheet ha

1987-02-12

1989-04-25

Sheehan, John P.

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

148112, H01F 104

Patent

active

048244937

ABSTRACT:
In the production of a grain-oriented electrical steel sheet by utilizing an AIN main inhibitor and at least twice cold-rolling with a heavy final reduction, improved magnetic properties are stably obtained by controlling the cooling speed (R) in the cooling process of a hot-rolled sheet annealing (R.gtoreq.5.degree.C./sec from 600.degree.-200.degree. C.) and by inter-pass aging (50.degree.-500.degree. C. for 1 minute or more) during the first cold-rolling.

REFERENCES:
patent: 3632456 (1972-01-01), Sakakura et al.
patent: 3636579 (1972-01-01), Sakakura et al.
patent: 4319936 (1982-03-01), Dadlstrom et al.
patent: 4595426 (1986-06-01), Iwayama et al.

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