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

1981-06-24

1982-08-10

Rutledge, L. Dewayne

Stock material or miscellaneous articles

All metal or with adjacent metals

Having metal particles

428627, 75238, B22F 702, C23C 1102

Patent

active

043438652

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.

REFERENCES:
patent: 3647576 (1972-03-01), Yamamura
patent: 3668017 (1972-06-01), Mandineau
patent: 3684585 (1972-08-01), Stroup
patent: 3784402 (1974-01-01), Reedy
patent: 4236926 (1980-12-01), Lindholm
patent: 4237184 (1980-12-01), Gonseth
patent: 4239536 (1980-12-01), Yamamoto
patent: 4268582 (1981-05-01), Hale
"Articles Coated with Boron and a Metallic Diboride", Ducrot et al., Chemical Abstracts, vol. 80, 1974, 73542g.

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