Cemented carbide, cutting tool containing the same, and method of manufacturing cemented carbide

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United States of America Patent

PATENT NO 11401587
APP PUB NO 20210025038A1
SERIAL NO

16606940

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Abstract

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Cemented carbide contains first hard-phase particles containing WC, second hard-phase particles which contain carbonitride containing at least Ti and Nb, and a metallic binder phase containing an iron-group element. The second hard-phase particle includes a granular core portion. The core portion contains composite carbonitride expressed as Ti1-X-YNbXWYC1-ZNZ, where X is not smaller than 0.1 and not greater than 0.2, Y is not smaller than 0 and not greater than 0.05, and Z is not smaller than 0.3 and not greater than 0.6. The cemented carbide has an absolute value of a difference not greater than 10, between a ratio (%) of an area occupied by the second hard-phase particles at a surface thereof and a ratio (%) of an area occupied by the second hard-phase particles in a region extending from the surface by 0.5 mm in a direction of depth.

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Patent Owner(s)

  • SUMITOMO ELECTRIC INDUSTRIES, LTD.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Fukae, Kosuke Osaka, JP 8 16
Gotou, Hiroaki Osaka, JP 14 20
Michiuchi, Masato Osaka, JP 12 13
Tsuda, Keiichi Osaka, JP 38 321

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