Back to results
US 7,665,552 B2Granted
Superhard insert with an interface
OwnerDavid R. Hall, Ronald Crockettinventors
Life of this patent
Estimating the term…
Abstract
In one aspect of the invention, a superhard insert has a carbide substrate bonded to ceramic layer at an interface. The substrate has a generally frusto-conical end at the interface with a tapered portion leading to a flat portion. The central section of the ceramic layer may have a first thickness immediately over the flat portion of the substrate. The peripheral section of the ceramic layer has a second thickness being less than the first thickness covering the tapered portion of the substrate. The ceramic layer may be formed using HPHT technology.
Claims11
A superhard insert, comprising:
- a carbide substrate bonded to a ceramic mono layer at an interface;
- the ceramic monolayer comprises an apex at the central axis of the insert;
- the substrate comprising a generally frusto-conical end at the interface with a tapered portion leading to a flat portion;
- the ceramic layer comprising diamond or cubic boron nitride and a central section immediately above the flat with a first thickness;
- the ceramic layer also comprising a peripheral section adjacent and bonded to the tapered portion of the substrate, the peripheral section comprising a second thickness which is less than the first thickness;
- and
- the flat portion comprising a diameter less than the first thickness.
4 more elements
Dependencies are inferred from the claim text.