Hard metal body and method of making same

Details Hard metal body and method of making same Hard metal body and method of making same

1982-05-25

1984-03-13

Rutledge, L. Dewayne

Coating processes

Applying superposed diverse coating or coating a coated base

Metallic compound-containing coating

4272557, 427249, 427255, C23C 1102, B22F 702

Patent

active

044367759

ABSTRACT:
A multi-layered wear resistant article and a method for forming the same is disclosed which is adapted for use with cutting tools. More particularly, the article includes a substrate formed from a cemented sintered metal carbide material such as a tungsten carbide and cobalt composition. A bonding layer formed of elemental boron is provided to increase the adhesion between the substrate and an outer coating of a wear resistant material such as titanium boride. A thin intermediate layer of titanium carbide, titanium nitride, titanium carbonitride, hafnium carbide, hafnium nitride, hafnium carbonitride, zirconium carbide, zirconium nitride, zirconium carbonitride, or a mixture of any of the foregoing may be interposed between the boron adhesive layer and the substrate to prevent diffusion of boron from the bonding layer into the substrate.

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patent: 4268582 (1980-12-01), Hale et al.
Ducrot et al., "Articles Coated with Boron and a Metallic Diboride", 1974, Chem. Ab. vol. 80,73542g.

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