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Inserts and compacts having coated or encrusted cubic boron nitride particles
Inserts and compacts having coated or encrusted cubic boron nitride particles
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机译:具有包覆或包覆立方氮化硼颗粒的嵌件和压坯
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摘要
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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