Process for producing finely divided spherical metal powders

Details Process for producing finely divided spherical metal powders Process for producing finely divided spherical metal powders

1986-09-12

1987-06-02

Stallard, Wayland

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 05BB, 75 05BC, 75 05BA, 75 1019, 264 15, B22F 900

Patent

active

046700471

ABSTRACT:
A process is disclosed for producing finely divided spherical metal powders. The process comprises forming a coating of a surface active agent which can be of the nonionic or anionic type on the surfaces of the particles of a metal powder, feeding the coated particles and a carrier gas into a high temperature zone and maintaining the particles in the zone for a sufficient time to melt at least about 50% by weight of the particles and to form droplets therefrom, and cooling the droplets to form metal particles having essentially a spherical shape with the majority of the particles having a size less than about 50 micrometers.

REFERENCES:
patent: 3852061 (1974-12-01), Wulff
patent: 3909241 (1975-09-01), Cheney et al.
patent: 3974245 (1976-08-01), Cheney et al.
patent: 4264354 (1981-04-01), Cheetham
patent: 4502885 (1985-03-01), Cheney
patent: 4568384 (1986-02-01), Maher
patent: 4592781 (1986-06-01), Cheney et al.
Merriman, A. D.; A Dictionary of Metallurgy; Macdonald & Evans; London, 1958; p. 257.

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