Title:
CEMENTED CARBIDE AND CUTTING TOOL
Document Type and Number:
WIPO Patent Application WO/2022/202136
Kind Code:
A1
Abstract:
The cemented carbide according to one non-limiting aspect of the present disclosure has a plurality of tungsten carbide particles and a bonded phase that contains at least Co. The bonded phase furthermore contains Cr. In a cross-section of the cemented carbide, a region in which a facing-surface length L of 100 nm or greater is maintained and in which the distance X between surfaces of adjacent tungsten carbide particles is 5 nm or less is designated as a WC/WC region. The Cr/Co ratio is greater than 1, where the Cr/Co ratio is the ratio (Cr value/Co value) of a Cr value and a Co value, the Cr value being the peak value of the atomic concentration of Cr obtained through elemental analysis of the WC/WC region in a direction crossing from one tungsten carbide particle across to the other tungsten carbide particle, and the Co value being the peak value of the atomic concentration of Co. A cutting tool based on a non-limiting aspect of the present disclosure has the aforementioned cemented carbide.
Inventors:
MATSUDA NAOHISA (JP)
YAMAMOTO SHINSUKE (JP)
HAMA TAKAHIRO (JP)
KINOSHITA HIDEYOSHI (JP)
YAMAMOTO SHINSUKE (JP)
HAMA TAKAHIRO (JP)
KINOSHITA HIDEYOSHI (JP)
Application Number:
PCT/JP2022/008482
Publication Date:
September 29, 2022
Filing Date:
March 01, 2022
Export Citation:
Assignee:
KYOCERA CORP (JP)
International Classes:
B23B27/14; C22C1/05; C22C29/08
Domestic Patent References:
| WO2019138599A1 | 2019-07-18 | |||
| WO2014132512A1 | 2014-09-04 |
Foreign References:
| JP2004256852A | 2004-09-16 | |||
| JP2003105459A | 2003-04-09 | |||
| JP2011195846A | 2011-10-06 |
Attorney, Agent or Firm:
BUNA PATENT ATTORNEYS (JP)
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