Method of producing silicon-iron sheet material with boron addit

Details Method of producing silicon-iron sheet material with boron addit Method of producing silicon-iron sheet material with boron addit

1978-02-27

1979-11-06

Rutledge, L. Dewayne

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

148 315, H01F 104

Patent

active

041735021

ABSTRACT:
Addition of as little as six parts per million boron to the magnesia final anneal coating on silicon-iron strip containing only about 1.5 ppm insures secondary recrystallization while the addition of 70 ppm boron to the coating on a strip containing 10 to 15 ppm boron results in substantial reduction in losses without affecting permeability of the final product when the nitrogen content of the alloy is in the 80 to 90 ppm range.

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patent: 3905842 (1975-09-01), Grenoble
patent: 3905843 (1975-09-01), Fiedler
patent: 3957546 (1976-05-01), Fiedler
patent: 4097343 (1978-06-01), Arendt et al.
patent: 4116730 (1978-09-01), Arendt et al.

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