Inserts and compacts having coated or encrusted cubic boron nitride particles
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United States of America Patent
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Jan 9, 2001
Grant Date -
N/A
app pub date -
Jan 16, 1998
filing date -
Jan 16, 1998
priority date (Note) -
Expired
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Abstract
An insert is provided for a rock bit for drilling bore holes in the ground and other downhole tools. The cutting portion of the inserts consist of encrusted cubic boron nitride pellets, tungsten carbide particles and a binder material which are fused together to form a unitary body. The cubic boron nitride particles of the fused insert are cubic in structure and substantially free of heat degradation and resultant hexagonal crystalline structure in response to fusing the elements together in a single step of simultaneously heating and compacting the elements.
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