Cubic boron nitride sintered material and tool
AssigneesSumitomo Electric Industries, Ltd., Sumitomo Electric Hardmetal Corp.
InventorsYu Kawamura, Akito Ishii, Masato Michiuchi, Katsumi Okamura, Yuta Yoshioka, Yuh Ishida
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Abstract
A cubic boron nitride sintered material includes: 70 volume % or more and 99 volume % or less of a cubic boron nitride grains; and a binder, wherein the binder includes a first compound including chromium, cobalt and carbon, tungsten carbide, cobalt, and aluminum, and in the first compound, a ratio NCr/(NCr+NCo) of the number NCr of atoms of the chromium to a sum of the number NCr of the atoms of the chromium and the number NCo of atoms of the cobalt is 0.10 or more and 0.90 or less.
Claims11
A cubic boron nitride sintered material comprising:
- 70 volume % or more and 99 volume % or less of cubic boron nitride grains;
- and a binder, wherein
- the binder includes
- a first compound including chromium, cobalt and carbon,
- tungsten carbide,
- cobalt, and
- aluminum, and
- in the first compound, a ratio NCr/(NCr+NCo) of the number NCr of atoms of the chromium to a sum of the number NCr of the atoms of the chromium and the number NCo of atoms of the cobalt is 0.10 or more and 0.90 or less.
Dependencies are inferred from the claim text.