Process for producing a semi-processed non-oriented electrical s

Details Process for producing a semi-processed non-oriented electrical s Process for producing a semi-processed non-oriented electrical s

1987-05-29

1989-07-25

Sheehan, John P.

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

148120, H01F 104

Patent

active

048510564

ABSTRACT:
In a conventional process for producing a semi-processed non-oriented electrical steel sheet, the silicon or aluminum content of a hot-rolled steel strip is high, especially in the case of producing a high-grade electrical sheet which has a low watt loss. However, a high silicon or aluminum content disadvantageously results in a decrease in the magnetic flux density.
A decrease in the watt loss and an increase in the magnetic flux density in semi-processed non-oriented electrical steel sheets as compared with conventional high-grade semi-processed non-oriented electrical steel sheets can be achieved by making the silicon content, which increases resistivity, low, i.e. from 0.1 to 1.0%, and the manganese content, which is effective for improving the texture, high i.e. from 0.75 to 1.5% and by subjecting the starting material, having a low silicon content, and a high manganese content to an appropriate production process for controlling texture.

REFERENCES:
patent: 3162554 (1964-12-01), Frischmann et al.
patent: 3867211 (1975-02-01), Easton
patent: 3988177 (1976-10-01), Ecker et al.
patent: 4204890 (1980-05-01), Irie et al.
patent: 4306922 (1981-12-01), Coombs et al.
Hu et al, "Effects of Carbon and Manganese on the Recrystallization Texture of Cold Rolled Low Carbon Steel Sheet", 3057 (Nov. 1970).
Ohashi et al, "Effects of Carbon and Manganese on the Recrystallization Texture of Cold Rolled Low Carbon Steel Sheet", Apr. 1973.
"Standard Methods for Estimating the Average Grain Size of Metals", ASTM, Designation E 112-63, pp. 420-433 (Reapproved 1969).

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