Powder intended for powder metallurgical manufacturing of soft m

Details Powder intended for powder metallurgical manufacturing of soft m Powder intended for powder metallurgical manufacturing of soft m

1978-03-02

1980-02-26

Stallard, W.

Specialized metallurgical processes, compositions for use therei

Compositions

Loose particulate mixture containing metal particles

C22C 3800, C22C 104

Patent

active

041904419

ABSTRACT:
An improved composition, for the powder metallurgical manufacture by sintering of soft magnetic components which consists essentially of powdered iron and phosphorus. Phosphorus is present in an amount of up to about 1.5% by weight of the composition. The improvement comprises powdered iron at least about 99.8% pure and containing less than about 5% by weight of particles exceeding 35 Tyler mesh (417 .mu.m) and less than about 20% by weight of particles less than 100 Tyler mesh (147 .mu.m), the remainder of the particles being in the range between about 35 and 100 Tyler mesh (417 and 147 .mu.m). The phosphorus content and iron particle size distribution is such that on sintering the composition provides components of satisfactory mechanical strength and having soft magnetic properties about as good as or better than the soft magnetic properties of components made of solid iron of comparable purity.

REFERENCES:
patent: 3836355 (1974-09-01), Lindskog et al.

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