Agglomerated anti-friction granules for plasma deposition

Details Agglomerated anti-friction granules for plasma deposition Agglomerated anti-friction granules for plasma deposition

C - Chemistry, Metallurgy

22

C

C22C 1/05 (2006.01) B22F 1/00 (2006.01) C22C 33/02 (2006.01) C23C 4/04 (2006.01) C23C 4/06 (2006.01)

Patent

CA 2164138

A collection of agglomerated anti-friction grains for plasma deposition, the grains each consisting essentially of (a) H2O 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 .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) H2O 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.

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