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US 2021/0171402 A1Published application
Sintered material and cutting tool including same
AssigneesSumitomo Electric Industries, Ltd., Sumitomo Electric Hardmetal Corp.
InventorsKatsumi OKAMURA, Hisaya HAMA, Mayu AMEMIYA, Satoru KUKINO
Life of this patent
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Abstract
A sintered material includes a cubic boron nitride, a zirconium-containing oxide, a zirconium-containing nitride, and an aluminum-containing oxide, wherein the zirconium-containing nitride includes both or one of ZrN and ZrON, and the aluminum-containing oxide includes a type Al2O3.
Claims5
1:
- A sintered material comprising a cubic boron nitride, a alumina-toughened zirconia (ATZ), a zirconium-containing nitride,
- and an aluminum-containing oxide, wherein
- the zirconium-containing nitride includes both or one of ZrN and ZrON,
- the aluminum-containing oxide includes α type Al2O3,
- in a graph indicating 2θ in a horizontal axis and a relative intensity in a vertical axis as a result of measuring an X-ray diffraction intensity of the sintered material using an X-ray diffraction method,
- the sintered material satisfies a relational expression of 0.31≤IZr/IAl≤0.62, where IZr represents a peak of the relative intensity in a (331) plane of each of both of the ZrN and the ZrON or a peak of the relative intensity in a (331) plane of one of the ZrN and the ZrON, and IAl represents a peak of the relative intensity in a (226) plane of the α type Al2O3, and
- a content of the cubic boron nitride is 20 to 80 volume % in the sintered material.
4 more elements
2:
- The sintered material according to claim 1, wherein
- in a graph indicating 2θ in a horizontal axis and a relative intensity in a vertical axis as a result of measuring an X-ray diffraction intensity of the sintered material using an X-ray diffraction method,
- a peak of the relative intensity in a (331) plane of each of both of the ZrN and the ZrON or a peak of the relative intensity in a (331) plane of one of the ZrN and the ZrON appears in a range of more than or equal to 93.5° and less than or equal to 94.5°.
3:
- (canceled)
4:
- The sintered material according to claim 1, wherein
- in a graph indicating 2θ in a horizontal axis and a relative intensity in a vertical axis as a result of measuring an X-ray diffraction intensity of the sintered material using an X-ray diffraction method,
- the sintered material satisfies a relational expression of 0.12≤IZr/IBN≤0.48, where IZr represents a peak of the relative intensity in a (331) plane of each of both of the ZrN and the ZrON or a peak of the relative intensity in a (331) plane of one of the ZrN and the ZrON, and IBN represents a peak of the relative intensity in a (220) plane of the cubic boron nitride.
5:
- A cutting tool comprising the sintered material recited in claim 1.