Cubic boron nitride sintered body
AssigneeTungaloy Corporation
InventorTakahide KUDOH
Life of this patent
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Abstract
A cubic boron nitride sintered body including cubic boron nitride and a binder phase, wherein: a content ratio of the cubic boron nitride is 85 volume % or more and 95 volume % or less, a content ratio of the binder phase is 5 volume % or more and 15 volume % or less, the binder phase contains Co3W3C, W2Co21B6, and an Al compound, and IB/IA is 0.02 or more and 0.15 or less, IC/IA is 0.02 or more and 1.00 or less, and IC≥ID, where IA denotes an X-ray diffraction peak intensity of a (111) plane of the cubic boron nitride, IB denotes an X-ray diffraction peak intensity of a (400) plane of the Co3W3C, IC denotes an X-ray diffraction peak intensity of a (420) plane of the W2Co21B6, and ID denotes an X-ray diffraction peak intensity of a (001) plane of WC.
Claims16
A cubic boron nitride sintered body comprising cubic boron nitride and a binder phase, wherein
- a content ratio of the cubic boron nitride is 85 volume % or more and 95 volume % or less based on a total amount of the sintered body,
- a content ratio of the binder phase is 5 volume % or more and 15 volume % or less based on the total amount of the sintered body,
- the binder phase comprises Co3W3C, W2Co21B6, and an Al compound, and
- IB/IA is 0.02 or more and 0.15 or less, IC/IA is 0.02 or more and 1.00 or less, and IC≥ID, where IA denotes an X-ray diffraction peak intensity of a (111) plane of the cubic boron nitride, IB denotes an X-ray diffraction peak intensity of a (400) plane of the Co3W3C, IC denotes an X-ray diffraction peak intensity of a (420) plane of the W2Co21B6, and ID denotes an X-ray diffraction peak intensity of a (001) plane of WC.
Dependencies are inferred from the claim text.