Process for production of coated super-hard alloy articles

Details Process for production of coated super-hard alloy articles Process for production of coated super-hard alloy articles

1981-07-17

1984-07-31

Childs, S. L.

Coating processes

Coating by vapor, gas, or smoke

Mixture of vapors or gases utilized

427249, 427255, 4272552, 427314, 4274192, 4274197, C23C 1100, C23C 1300

Patent

active

044630336

ABSTRACT:
A cutting tool or a wear-resistant mechanical part comprises: a substrate of WC, Co, TiC, and TaC with or without an inner coating layer of TiC, TiN or TiCN; an intermediate layer of a titanium oxycarbide formed on the surface of the substrate or the inner coating layer by carrying out a reaction thereon at a temperature of 800.degree. to 1,200.degree. C. of a halide of titanium, hydrogen, and carbon monoxide or carbon dioxide or a mixture thereof; and an outer coating layer of aluminum oxide formed on the outer surface of the intermediate layer. The thicknesses of the inner layer, the intermediate layer, and the outer coating layer are of the order of 0.5 to 20 microns, 0.5 to 20 microns, and 0.5 to 10 microns, respectively.

REFERENCES:
patent: 3656995 (1972-04-01), Reedy
patent: 3736107 (1973-05-01), Hale
patent: 3802933 (1974-04-01), Rausch et al.
patent: 3836392 (1974-09-01), Lux et al.
patent: 3837894 (1974-09-01), Tucker
patent: 3955038 (1976-05-01), Lindstrom et al.
patent: 4018631 (1977-04-01), Hale
patent: 4026730 (1977-05-01), Van Thyne et al.
patent: 4035541 (1977-07-01), Smith et al.
patent: 4052530 (1977-10-01), Fonzi
patent: 4162338 (1979-07-01), Schintlmeister
Storms, E. K., The Refractory Carbides, vol. 2, Academic Press, pp. 10, 11, 236 and 237, TN 677585, (1967).

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