Grain-oriented silicon steel sheet having a low iron loss free f

Details Grain-oriented silicon steel sheet having a low iron loss free f Grain-oriented silicon steel sheet having a low iron loss free f

1987-11-05

1990-08-28

Sheehan, John P.

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

148307, 148308, H01F 104

Patent

active

049522531

ABSTRACT:
A grain-oriented silicon steel sheet having a low iron loss, due to the subdividing effect of magnetic domain wall spacing, free from deterioration due to the stress-relief annealing, can be obtained by forming on its surface a forsterite film locally having regions, which have a thickness different from that of the remaining regions in the film, or locally having filmless regions which do not coat the steel sheet surface.

REFERENCES:
patent: 2410220 (1946-10-01), Langworthy
patent: 2985855 (1961-05-01), Stone
patent: 3544396 (1970-12-01), Taylor
patent: 3990923 (1976-11-01), Takashina et al.
Irie et al, "Effects of Insulating Coating on Domain Structure in Grain Oriented 3% Si-Fe Sheet as Observed with a High Voltage Scanning Electron Microscope", American Inst. of Phys. Proc. of the Sym. on Magnetism and Mag. Mat., New York, 1976, pp. 574-575.
Handbook of Chemistry and Physics, 1973, 54th ed, p. F108.

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