Cubic boron nitride sintered body and coated cubic boron nitride sintered body
AssigneeTungaloy Corporation
InventorYuichiro Fukushima
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 40 volume % or more and 80 volume % or less; a content of the binder phase is 20 volume % or more and 60 volume % or less; an average particle size of the cubic boron nitride is 0.5 μm or more and 4.0 μm or less; the binder phase contains TiC and TiB2 and contains substantially no AlN and/or Al2O3; a (101) plane of TiB2 in the binder phase shows a maximum peak position (2θ) in X-ray diffraction of 44.2° or more; and a (200) plane of TiC in the binder phase shows a maximum peak position (2θ) in X-ray diffraction of less than 42.1°.
Claims6
A cubic boron nitride sintered body comprising cubic boron nitride and a binder phase, wherein a content of the cubic boron nitride is 40 volume % or more and 80 volume % or less;
- a content of the binder phase is 20 volume % or more and 60 volume % or less;
- an average particle size of the cubic boron nitride is 0.5 μm or more and 4.0 μm or less;
- the binder phase consists of TiC and TiB2;
- a (101) plane of TiB2 in the binder phase shows a maximum peak position (2θ) in X-ray diffraction of 44.2° or more;
- and
- a (200) plane of TiC in the binder phase shows a maximum peak position (2θ) in X-ray diffraction of less than 42.1°.
Dependencies are inferred from the claim text.