Patent ID: 7360972
Filing Date: 2008-04-22
Classification: B22F,B23B,B23P,Y10T

Abstract:
1. A cutting insert comprising: a cutting insert body having a plurality of cavities formed therein through an entire thickness of the cutting insert body from a first side to a second side; a plurality of cutting tips, each of the plurality of cutting tips disposed in a respective cavity, the cutting tips having a geometry that provides a mechanical retention or lock when inserted into the cavities of the cutting insert body and further comprising a braze joint between each of the cutting tips and the cutting insert body, wherein the cutting insert body is formed from a cemented carbide, cermet, or hard metal alloy, wherein each of the cutting tips is formed entirely of a superhard cutting material composition, the superhard cutting material composition comprising a composite having a first phase comprising cubic boron nitride or polycrystalline diamond particles and a second phase comprising a semiconductor, and wherein the superhard cutting material further comprises at least one of a nitride, carbonitride, oxide or boride of a metal chosen from groups IVa-VIa of the Periodic Table.