Process for producing tungsten heavy alloy sheet using high temp

Details Process for producing tungsten heavy alloy sheet using high temp Process for producing tungsten heavy alloy sheet using high temp

1988-01-14

1988-12-27

Lechert, Jr., Stephen J.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Powder pretreatment

75 05BB, 75248, 419 36, 419 40, 419 43, 419 47, 419 53, 419 54, B22F 100

Patent

active

047939699

ABSTRACT:
A process is disclosed for producing a sheet of tungsten heavy alloy which comprises forming metal particles of the alloy wherein each metal particle is a uniform admixture of the alloy components, entraining the particles in a carrier gas, passing the particles and the carrier gas into a high temperature zone at a temperature above the melting point of the matrix phase of the particles and maintaining the particles in the zone for a sufficient time to melt at least the matrix phase of the particles and form spherical particles, followed by rapidly and directly solidifying the high temperature treated material while the material is in flight. A slurry is formed of this high temperature treated material and a liquid medium, the liquid medium is removed from the material and a planar cake is formed of the material, the cake is dried, and sintered to a density equal to or greater than about 90% of the theoretical density of the alloy to form the sheet.

REFERENCES:
patent: 3890145 (1975-06-01), Hivert et al.
patent: 4698096 (1987-10-01), Schmidberger et al.

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