Cemented carbide, cutting tool including same, and method of producing cemented carbide

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United States of America Patent

PATENT NO 11111564
APP PUB NO 20200291504A1
SERIAL NO

16768214

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Abstract

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A cemented carbide includes second hard phase grains, wherein the second hard phase grains includes a core portion, and in a case where a total of 70 unit regions that are each constituted of a square having each side of 8μm are provided by successively arranging 7 unit regions in a longitudinal direction and 10 unit regions in a lateral direction in an electron microscope image of any cross section of the cemented carbide captured at a magnification of 1500×, where the total number of core portions in the total of 70 unit regions is calculated, and where a percentage of the number of core portions in each of the unit regions with respect to the total number of core portions is calculated, the number of unit regions in which the percentage is less than 0.43% or more than 2.43% is less than or equal to 10.

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Patent Owner(s)

  • SUMITOMO ELECTRIC HARDMETAL CORP.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Fukae, Kosuke Itami, JP 8 15
Imamura, Shinya Itami, JP 108 605
Kido, Yasuki Itami, JP 43 29
Watanabe, Masami Itami, JP 76 1155

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