Process for producing phosphorous-bearing soft magnetic material

Details Process for producing phosphorous-bearing soft magnetic material Process for producing phosphorous-bearing soft magnetic material

1977-06-27

1979-05-01

Dean, R.

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

75123D, 75211, 75214, 75224, 252 6255, H01F 122

Patent

active

041521790

ABSTRACT:
A method for producing a soft magnetic material consisting essentially of up to 0.05% carbon, up to 1.0% manganese, up to 0.5% sulfur, up to 0.5% silicon, from 0.5 to 1.5% phosphorus, balance iron and residuals. The method comprises the steps of: blending iron powder and phosphorus-bearing powder into a mixture containing from 0.5 to 1.5% phosphorus; pressing the blended mixture; and sintering the mixture in a non-oxidizing atmosphere at a temperature and for a period of time sufficient to produce a density of at least 7 grams per cubic centimeter. The sintering temperature is at least 2200.degree. F. The soft magnetic material is characterized by a magnetizing force to reach 10 kilogauss of no more than 2.0 oersteds, and a coercive force from 10 kilogauss of no more than 0.9 oersted.

REFERENCES:
patent: 2661282 (1953-12-01), Dacey
patent: 3120698 (1964-02-01), Elliott
patent: 3497347 (1970-02-01), Dautzenberg et al.
patent: 3836355 (1974-09-01), Lindskog et al.
patent: 4047983 (1977-09-01), Falkowski et al.
Panasyuk, et al.; Effect of P-Additions on Mag. Prop. . . . Iron Powder, Jun. 1973, New York, (Plenum), pp. 289-292, 196-198 & 983-984.
Bozorth, R.; Ferromagnetism, New York, 1951, pp. 251-253.

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