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.
Inventors
👤 Donald E. Graham
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-11-08 03:37
CPC Classifications
C; C23; C23C; C23C30/00; C23C30/005
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
59 words
A method of producing a multi-layered wear resistant article with improved bonding strength between the layers comprising the steps of: providing a substrate formed from a cemented sintered metal carbide material; depositing a bonding layer on said substrate, said bonding layer being formed of boron; and coating said bonding layer with a wear resistant material formed from titanium boride.
Claim 2
Independent Claim
59 words
A method of producing a multi-layered wear resistant article with improved bonding strength between the layers comprising the steps of: providing a substrate formed from a cemented sintered metal carbide material; depositing a bonding layer on said substrate, said bonding layer being formed of boron; and coating said bonding layer with a wear resistant material formed from titanium boride.
Claim 3
Dependent Claim
31 words
A method as recited in claim 1 wherein said bonding layer is 1 to 15 microns thick and wherein said outer coating of titanium boride is 3 to 20 microns thick.
Claim 4
Dependent Claim
59 words
A method as recited in claim 1 further including the step of depositing an intermediate layer over said substrate prior to the deposition of said bonding layer, said intermediate layer being formed from 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.
Claim 5
Dependent Claim
27 words
A method as recited in claim 2, said intermediate layer being formed from titanium carbide, titanium nitride, titanium carbonitride, or a mixture of any of the foregoing.