Thermally spraying metal/solid lubricant composites using...

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C - Chemistry, Metallurgy

23

C

C23C 4/12 (2006.01) B05B 7/22 (2006.01) B05B 13/06 (2006.01) B05D 1/10 (2006.01) B05D 3/02 (2006.01) C23C 4/04 (2006.01) C23C 4/14 (2006.01)

Patent

CA 2099396

A method of thermally spraying a solid lubricant (i.e. graphite or BN) impregnated metal matrix onto a metal target, using the steps of: (a) creating a flame or arc into which a consummable strand is fed, the strand being constituted as a hollow sheath of metal and a core therein comprising essentially solid lubricant powder particles, the flame or arc melting the metal of such strand; (b) applying a pressurized jet of atomizing gas to the melt and included graphite particles to project a spray of molten heavy metal and graphite particles generally homogeneously distributed throughout such spray, said graphite being protected against ablation during transit from the flame or arc to the target; and (c) surface heat treating essentially only the deposit to precipitate additional graphite while densifying the metal and controlling microstructure.

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