Coated super-hard alloy articles

Details Coated super-hard alloy articles Coated super-hard alloy articles

1979-02-05

1982-07-27

Lewis, Michael L.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

427249, 4272553, 4272557, 428336, 428469, 428472, 428627, B32B 702

Patent

active

043418341

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.

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