Production of metal powder

Details Production of metal powder Production of metal powder

1974-04-24

1976-01-06

White, Robert F.

Plastic and nonmetallic article shaping or treating: processes

Formation of solid particulate material directly from molten...

Utilizing electrical energy

264 24, B22D 2308

Patent

active

039313751

ABSTRACT:
Small particles of metal, such as those used in making powder metal compacts, are produced by feeding the end of a metal wire or rod against the edge of a rotating disc and causing a direct electrical current to flow through the wire and disc. This melts the end of the wire and also creates a magnetic field about the wire. The rotation of the disc breaks the electrical contact and forms an arc which causes additional melting of the wire. Contact between the wire and disc takes place within a second electromagnetic field. Continuously advancing the end of the wire causes the intermittent making and breaking of electrical contact. The interaction of the two magnetic fields causes the molten particles to be removed from the area of contact. Means are provided for cooling and collecting the metal particles and for preventing the accumulation of solidified metal particles on the electromagnet or the rotating disc. Vacuum conditions may be used, thus producing a powder of high purity.

REFERENCES:
patent: 2897539 (1959-08-01), McMillan
patent: 3021562 (1962-02-01), Chisholm
patent: 3041672 (1962-07-01), Lyle

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