Electrical discharge scribing for improving core loss of grain-o

Details Electrical discharge scribing for improving core loss of grain-o Electrical discharge scribing for improving core loss of grain-o

1988-03-18

1990-06-05

Leung, Philip H.

Electric heating

Metal heating

Cutting or disintegrating

148112, H01F 104, B23K 900

Patent

active

049316133

ABSTRACT:
A method and apparatus are provided for domain refinement of texture annealed and insulation coated grain-oriented silicon steel strip by contacting the insulated steel surface to be scribed with a discharge electrode, providing a high voltage-low current and low voltage-high current to the electrode, moving the electrode across the steel while essentially maintaining contact therewith, and marking the steel with a plurality of indentations generally aligned across the steel surface by pulsing the high current to produce a plurality of electrical discharges.

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Metals Abstracts, vol. 16, Apr. 1983, p. 183, No. 56-0373, Foxton, Cambridge, GB; L. N. Larikov et al: "The Formation of an Amorphous Layer on Fe86B14 alloy under the effect of a spark discharge."
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