Specialized metallurgical processes – compositions for use therei – Processes – Producing solid particulate free metal directly from liquid...
Patent
1996-07-09
1998-12-08
Wyszomierski, George
Specialized metallurgical processes, compositions for use therei
Processes
Producing solid particulate free metal directly from liquid...
75340, 75346, 75351, B22F 908
Patent
active
058462899
ABSTRACT:
A collection of agglomerated anti-friction grains for plasma deposition, the grains each consisting essentially of (a) H.sub.2 O atomized stainless steel particles, (b) solid lubricant particles consisting of at least one of boron nitride or a eutectic of calcium fluoride and lithium fluoride, and (c) a binder holding said steel and solid lubricant particles together for plasma spraying, said binder being present in an amount of 0.5-4.0% by weight and is vaporizable at the temperature of plasma spraying and does not interfere with the deposited process. A method of making agglomerated grains of powder suitable for plasma deposition, by (a) H.sub.2 O atomization of a molten stream of martensitic stainless steel to produce a collection of first particles, (b) uniformly blending such first particles with solid lubricant second particles and a binder agent in a slurry, the binder agent being present in a small amount and being constituted to vaporize at the temperature of plasma spraying, and (c) mist spraying the slurry into a heated chamber to form a collection of porous rounded granules.
REFERENCES:
patent: 3009205 (1961-11-01), Monson et al.
patent: 4240831 (1980-12-01), Ro et al.
patent: 5332422 (1994-07-01), Rao et al.
patent: 5458670 (1995-10-01), Ogura et al.
Ford Global Technologies Inc.
Malleck Joseph W.
Wyszomierski George
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