Appeal No. 1996-3806
Application 08/183,152
has no cubic
carbides to a depth at least sufficient to avoid exposure of
cubic carbides to a workpiece in tribological applications.
Claim 1 is illustrative:
1. A coated article for tribological applications, said
article having a wear surface and comprising:
a densified substrate substantially comprising at least
one of cemented carbides, cemented nitrides, cemented
carbonitrides, ceramics, and combinations thereof; and
a coating codeposited on said substrate and providing
said wear surface, said coating being about 1-50 µm thick and
comprising a pore-free, dense hard phase/cobalt binder
composite, said hard phase comprising tungsten carbide,
nitride, or carbonitride;
wherein said wear surface includes said hard phase/cobalt
binder composite, but includes no cubic carbides to a depth at
least sufficient to avoid exposure of cubic carbides to a
workpiece during use of said article in said tribological
applications, such that said coated article provides wear
resistance and chemical inertness and possesses good shape
retention at high machining speeds.
THE REFERENCES
Hale 4,497,874 Feb. 5,
1985
Sastri 4,556,607 Dec. 3,
1985
THE REJECTIONS
-2-2
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