CEMENTED CARBIDE AND CUTTING TOOL INCLUDING SAME - SUMITOMO ELECTRIC HARDMETAL CORP

Title:

CEMENTED CARBIDE AND CUTTING TOOL INCLUDING SAME

Document Type and Number:

WIPO Patent Application WO/2021/210357

Kind Code:

A1

Abstract:

Provided is a cemented carbide comprising first hard-phase particles, second hard-phase particles, third hard-phase particles, and a metallic binder phase. The cemented carbide has a total of 70 unit areas. In the total of 70 unit areas, the number of unit areas, in which the percentage of the total number of the second hard-phase particles and the third hard-phase particles present in each of the unit areas with respect to the total number of the second hard-phase particles and the third hard-phase particles present in the total of 70 unit areas is less than 0.43% or greater than 2.43%, is 10 or less. In a total of 10 unit areas located at the fourth row in the vertical direction, the percentage of the number of the third hard-phase particles with respect to the total number of the second hard-phase particles and the third hard-phase particles is 5-15%.

Inventors:

FUKAE KOSUKE (JP)
KIDO YASUKI (JP)
WATANABE MASAMI (JP)
IMAMURA SHINYA (JP)

Application Number:

PCT/JP2021/011861

Publication Date:

October 21, 2021

Filing Date:

March 23, 2021

Export Citation:

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Assignee:

SUMITOMO ELECTRIC HARDMETAL CORP (JP)

International Classes:

C22C29/08; B23B27/14; C22C1/05

Domestic Patent References:

WO2020070978A1	2020-04-09
WO2019207876A1	2019-10-31
WO2011136197A1	2011-11-03
WO2017191744A1	2017-11-09

Foreign References:

JP2016087742A	2016-05-23
JP2012086298A	2012-05-10
JP2020072993A	2020-05-14

Other References:

SHIGEHIKO TANAKA ET AL., OTSU'S DISCRIMINANT ANALYSIS METHOD WITH GRAY LEVEL CO-OCCURRENCE HISTOGRAM
SHIGEHIKO TANAKA, MEETING ON IMAGE RECOGNITION AND UNDERSTANDING (MIRU2011
SHIGEHIKO TANAKA, MEETING ON IMAGE RECOGNITION AND UNDERSTANDING (MIRU, vol. 1-3, July 2011 (2011-07-01), pages 93 - 96