Method for magnetic domain refining of oriented silicon steel

Details Method for magnetic domain refining of oriented silicon steel Method for magnetic domain refining of oriented silicon steel

1989-09-29

1992-01-07

Sheehan, John P.

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

H01F 104

Patent

active

050788116

ABSTRACT:
A method is provided to effect domain refinement of grain-oriented silicon steel sheets having a surface layer of forsterite by applying to the layer a phosphorus-rich flux-printing agent having a desired composition, and degree of fluidity in a sufficient amount to effect removal of the forsterite layer in a striped pattern with sufficient phosphorus to subsequently chemically stripe the underlying metal with phosphide-bearing bodies to produce in the steel a heat-proof domain refinement with improved lower core loss values, after first heating in an oxidizing atmosphere and second heating in a reducing atomsphere.

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patent: 4513597 (1985-04-01), Kimoto et al.
patent: 4680062 (1987-07-01), Shen et al.
patent: 4911766 (1990-03-01), Ames et al.
patent: 4968361 (1990-11-01), Ames et al.

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