Cubic boron nitride sintered body and coated 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 of the cubic boron nitride is 81 volume % or more and 95 volume % or less and a content of the binder phase is 5 volume % or more and 19 volume % or less based on the total amount of the sintered body; and a content of Al in the binder phase is 0.5 mass % or more and 5 mass % or less, a content of W in the binder phase is 2 mass % or more and 10 mass % or less, a content of V in the binder phase is 2 mass % or more and 8 mass % or less, and a content of Cr in the binder phase is 0 mass % or more and 5 mass % or less, based on 100 mass % in total of all elements contained in the sintered body.
Claims8
A cubic boron nitride sintered body comprising cubic boron nitride and a binder phase, wherein
- a content of the cubic boron nitride is 81 volume % or more and 95 volume % or less based on a total amount of the sintered body,
- a content of the binder phase is 5 volume % or more and 19 volume % or less based on the total amount of the sintered body,
- a content of Al in the binder phase is 0.5 mass % or more and 5 mass % or less based on 100 mass % in total of all elements contained in the sintered body,
- a content of W in the binder phase is 2 mass % or more and 10 mass % or less based on 100 mass % in total of all the elements contained in the sintered body,
- a content of V in the binder phase is 2 mass % or more and 8 mass % or less based on 100 mass % in total of all the elements contained in the sintered body,
- a content of Cr in the binder phase is 0 mass % or more and 5 mass % or less based on 100 mass % in total of all the elements contained in the sintered body, and
- in the binder phase, a ratio of a content (volume %) of a first material S1 composed of a compound containing W to a total content (volume %) of the first material S1 and a second material S2 composed of a compound being free of W and containing V, (S1/(S1+S2)), is 0.35 or more and 1 or less.
Dependencies are inferred from the claim text.