The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 05, 2024
Filed:
Apr. 03, 2019
Sumitomo Electric Industries, Ltd., Osaka, JP;
Sumitomo Electric Hardmetal Corp., Itami, JP;
Naoki Watanobe, Osaka, JP;
Takashi Harada, Osaka, JP;
Katsumi Okamura, Osaka, JP;
Satoru Kukino, Itami, JP;
Taisuke Higashi, Itami, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Sumitomo Electric Hardmetal Corp., Itami, JP;
Abstract
A composite sintered material includes: a plurality of diamond grains having an average grain size of less than or equal to 10 μm; a plurality of cubic boron nitride grains having an average grain size of less than or equal to 2 μm; and a plurality of aluminum oxide grains having an average grain size of less than or equal to 0.5 μm; and a remainder of a binder phase, wherein at least parts of adjacent diamond grains are bound to one another, the binder phase includes cobalt, in the composite sintered material, a content of the diamond grains is from 30 to 92 volume %, a content of the cubic boron nitride grains is from 3 to 40 volume %, a content of the aluminum oxide grains is from 2 to 15 volume %, and a content of the cobalt is from 3 to 30 volume %.