Process for producing grain-oriented thin electrical steel sheet

Details Process for producing grain-oriented thin electrical steel sheet Process for producing grain-oriented thin electrical steel sheet

1989-03-16

1991-02-12

Sheehan, John P.

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

148113, H01F 104

Patent

active

049921142

ABSTRACT:
The present invention provides a grain-oriented electrical steel sheet having a thickness of up to 0.17 mm and excellent product magnetic characteristics. The present invention is characterized in that a silicon containing acid-soluble Al, N and Sn is used as the starting material, the N and acid-soluble Al contents in the slab are adjusted to 0.0050 to 0.0100% and {(27/14).times.N (%)+0.0035} to {(27/14).times.N (%)+0.0100}%, respectively, the thickness of the hot-rolled sheet is adjusted so that the thickness reduction ratio at the one-stage cold-rolling is 85 to 92%, and the Nas AlN content in the hot-rolled steel sheet is controlled to 0.0005 to 0.0020%.

REFERENCES:
Patent Abstracts of Japan, vol. 8, No. 67 (C-216) [1504], Mar. 29, 1984.
European Search Report, Application No. EP 89 10 4829.

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