Patent ID: 11920222
Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 1:
2. The composite sintered material according to claim 1, wherein
the average grain size of the diamond grains is less than or equal to 2 μm, and the average grain size of the cubic boron nitride grains is less than or equal to 1 μm, and
in the composite sintered material, the content of the diamond grains is more than or equal to 50 volume % and less than or equal to 70 volume %, the content of the cubic boron nitride grains is more than or equal to 10 volume % and less than or equal to 30 volume %, and the content of the cobalt is more than or equal to 5 volume % and less than or equal to 15 volume %.