Superhard composite material bonded to a steel body
OwnerDavid R. Hall, Ronald Crockett +2inventors
InventorsDavid R. Hall, Ronald Crockett, Jeff Jepson, Joe Fox
Life of this patent
Estimating the term…
Abstract
In one aspect of the invention, a pick comprises a steel body comprising a formed shank attached to a first end of the body and generally extending along a central axis of the body. An impact tip is secured to a second end of the steel body and comprises a carbide substrate attached to the second end of the steel body which is bonded to a superhard material. A composite material is bonded to an outer surface of the steel body and adapted to protect the steel from wear. The composite material comprises a plurality of superhard particles held within a matrix. The matrix comprises a superhard particle concentration of 40 to 80 percent by volume.
Claims18
A pick, comprising:
- a steel body comprising a formed shank attached to a first end of the body and generally extending along a central axis of the body;
- an impact tip secured to a second end of the steel body;
- the tip comprising a carbide substrate attached to the second end of the steel body and being bonded to a diamond material;
- a composite material fixed within a plurality of annular grooves formed in an outer surface of the steel body and adapted to protect the steel from wear, at least one groove being formed proximate the tip;
- the composite material comprising a plurality of diamond particles held within a matrix;
- and
- the matrix comprising a diamond particle concentration of 40 to 80 percent by volume.
A method of depositing a wear resistant composite material onto an outer surface of a steel pick body, comprising:
- forming at least one groove in a body of the pick;
- providing a composite material by mixing diamond or cubic boron nitride particles with a matrix material, the particles comprising a concentration of 40 to 80 percent by volume;
- placing the composite material into the at least one a plurality of annular grooves formed in the outer surface of the body, at least one groove being formed proximate the tip;
- heating the composite material to a temperature above the melting temperature of the matrix material and below the melting temperature of the steel;
- and
- cooling the body and the composite material.
Dependencies are inferred from the claim text.