Process for producing a grain-oriented electrical steel sheet

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

1984-05-11

1986-10-07

Sheehan, John P.

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

148112, 148308, H01F 104

Patent

active

046157506

ABSTRACT:
The present invention relates to a process for producing a grain-oriented electrical steel sheet by means of the so-called double-rolling process, using Mn, S, and Cu as the precipitation dispersion phases for suppressing the growth of primary-recrystallized crystal grains.
A new concept according to the present invention is to suppress the growth of primary crystals by means of an element segregated in the grain boundaries of primary-recrystallized crystals.
The present invention is characterized in that the silicon steel starting material contains T.[N] in an amount which satisfies the following formulas (1) and (2):

REFERENCES:
patent: 3986902 (1976-10-01), Regitz
patent: 4006044 (1977-02-01), Oya et al.
patent: 4212689 (1980-07-01), Shimizu et al.
patent: 4244757 (1981-01-01), Malagari et al.
patent: 4437909 (1984-03-01), Mori et al.
Chen, "Recent Developments in Soft Magnetic Materials," J. of Magnetism and Magnetic Materials, 7 (1978), pp. 308-311.
Stroble, "Precipitate Morphology in MnS-AlN-Inhibited High Permeability Grain Oriented Silicon Steel," IEEE Trans. on Magnetics, vol. MAG-12, No. 6, Nov. 1976, pp. 861-862.

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