Coating processes – Spray coating utilizing flame or plasma heat – Continuous feed solid coating material
Patent
1992-07-07
1993-03-16
Pianalto, Bernard
Coating processes
Spray coating utilizing flame or plasma heat
Continuous feed solid coating material
427224, 427225, 427249, 427250, 4272552, 4273837, 427422, 427427, 427451, 427456, 427540, 427580, B05D 306
Patent
active
051943042
ABSTRACT:
A method of the 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.
REFERENCES:
patent: 4071734 (1978-01-01), Zarechensky et al.
patent: 4987003 (1991-01-01), Schuster et al.
"Arc Spraying of Cored Wires", Busse, Thermal Spraying, Jun. 1989, pp. 19-28.
Wear, 86 (1983), "Dev. Laser Surface Process, etc.", Blarasin et al., pp. 315-325.
"Surface Treatment with High-Intensity Arc Lamp", Adv. Mat. Sep. 1990, pp. 37-41.
McCune, Jr. Robert C.
Reatherford Larry V.
Zaluzec Matthew J.
Ford Motor Company
Malleck Joseph W.
May Roger L.
Pianalto Bernard
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