Method of producing low iron loss grain-oriented silicon steel s

Details Method of producing low iron loss grain-oriented silicon steel s Method of producing low iron loss grain-oriented silicon steel s

1993-02-11

1994-03-22

Sheehan, John P.

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

148111, 21912112, 21912117, 21912119, 21912120, 21912135, H01F 104

Patent

active

052960510

ABSTRACT:
A method of producing a low iron loss grain oriented silicon steel sheet which generates improved magnetostrictive characteristics when used as a stacked iron core and low noise when used in a stacked transformer, as well as superior shape characteristics. A grain oriented finish-annealed silicon steel sheet is coated with an insulating film. The surface of the grain oriented silicon steel sheet is irradiated with an electron beam along a multiplicity of spaced paths so as to refine the magnetic domains. The irradiation with the electron beam is conducted continuously or intermittently along a waveform path on the surface of the grain oriented silicon steel, and the wave-form, such as a zigzag form, has a period length much smaller than the width of the grain oriented silicon steel sheet, and line interconnecting the centers of successive waves extends substantially perpendicularly to the direction of rolling of the grain oriented silicon steel sheet.

REFERENCES:
patent: 3076160 (1963-01-01), Daniels
patent: 4915750 (1990-04-01), Salsgiver et al.
patent: 4919733 (1990-04-01), Salsgiver et al.
patent: 5146063 (1992-09-01), Inokuti

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