Method of laying a cobalt-chromium-tungsten protective coating o

Details Method of laying a cobalt-chromium-tungsten protective coating o Method of laying a cobalt-chromium-tungsten protective coating o

1987-05-28

1989-06-13

Zimmerman, John J.

Stock material or miscellaneous articles

All metal or with adjacent metals

Having composition, density, or hardness gradient

428661, 427205, B32B 1504, C23C 1030

Patent

active

048392375

ABSTRACT:
A method of laying a protective coating on a blade (1) made of a titanium alloy including vanadium. Vanadium powder is deposited on the portion of the blade (1) to be coated, the temperature of the powder is then raised to a temperature slightly greater than the melting point of vanadium. A powder of a cobalt-chromium-tungsten alloy is then deposited on the layer of vanadium, and this powder is raised to a temperature greater than its melting temperature and less than the melting temperature of vanadium. A blade made of an alloy of titanium including vanadium is characterized in that the blade includes a coating layer (5) of cobalt-chromium-tungsten alloy at its periphery, said layer being at least 1 mm thick and covering an underlayer of vanadium (6) which has a thickness lying in the range 0.5 mm to 1.5 mm. The resulting blade has very high resistance to abrasion by water droplets.

REFERENCES:
patent: 2612442 (1952-09-01), Goetzel
patent: 2763919 (1956-09-01), Kempe et al.
patent: 2854739 (1958-10-01), Bartlett et al.
patent: 3015880 (1962-01-01), Stephenson
patent: 3060557 (1962-10-01), Rostoker et al.
patent: 3471342 (1969-10-01), Wood
patent: 4137370 (1979-01-01), Fujishiro et al.
patent: 4305998 (1981-12-01), Manty et al.

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