EDM cuttable, high CBN content solid PCBN compact
AssigneeElement Six Limited
InventorsYahua Bao, Scott Horman, Xian Yao, Qingyuan Liu
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Abstract
The present disclosure relates to cubic boron nitride (cBN) cutting elements that have high cBN content and that are cuttable by electric discharge machining (EDM). A cutting element according to an embodiment includes a self-sintered polycrystalline cubic boron nitride (PCBN) compact, having a first phase of cubic boron nitride (cBN) particles and a ceramic binder phase with titanium compounds. The first phase occupies greater than 80% by volume of the self-sintered PCBN compact. The self-sintered PCBN compact has an electrical conductivity sufficient to be cuttable by electrical discharge machining.
Claims10
A cutting element comprising:
- a self-sintered polycrystalline cubic boron nitride (PCBN) compact, comprising
- a first phase of cubic boron nitride (cBN) particles and a conductive ceramic binder phase comprising titanium diboride, the first phase occupying greater than 80% by volume of the self-sintered PCBN compact,
- wherein the conductive ceramic binder phase further comprises Aluminum compounds, and a ratio of Titanium to Aluminum in the self-sintered PCBN compact is approximately 2 or 3;
- and
- wherein the self-sintered PCBN compact has an electrical conductivity sufficient to be cuttable by electrical discharge machining.
Dependencies are inferred from the claim text.