Title:
CEMENTED CARBIDE AND CUTTING TOOL COMPRISING SAME
Document Type and Number:
WIPO Patent Application WO/2022/091343
Kind Code:
A1
Abstract:
This cemented carbide includes a first phase comprising a plurality of tungsten carbide particles, and a second phase containing cobalt. In an image obtained by imaging the cemented carbide with a scanning electron microscope, the proportion of the first phase is 78% by surface area or greater but less than 100% by surface area, and, the proportion of the second phase is greater than 0% by surface area and at most 22% by surface area. When equivalent circle diameters are calculated for the tungsten carbide particles in the image, the mean value for the equivalent circle diameters is between 0.5 μm and 1.2 μm inclusive, the tungsten carbide particles having equivalent circle diameters of 0.3 μm or smaller occupy a count-based proportion of 10% or less, and the tungsten carbide particles having equivalent circle diameters of larger than 1.8 μm occupy a count-based proportion of less than 2%. The cemented carbide has a mass-based cobalt content of greater than 0% by mass and at most 10% by mass.
Inventors:
YAMAKAWA TAKAHIRO (JP)
HIROSE KAZUHIRO (JP)
UCHINO KATSUYA (JP)
YAMAMOTO TSUYOSHI (JP)
HIROSE KAZUHIRO (JP)
UCHINO KATSUYA (JP)
YAMAMOTO TSUYOSHI (JP)
Application Number:
PCT/JP2020/040829
Publication Date:
May 05, 2022
Filing Date:
October 30, 2020
Export Citation:
Assignee:
SUMITOMO ELECTRIC HARDMETAL CORP (JP)
International Classes:
B23B27/14; B23B51/00; B23C5/16; B23D77/00; C22C29/08; B22F1/00; B22F3/10
Domestic Patent References:
| WO2010119795A1 | 2010-10-21 | |||
| WO2018180911A1 | 2018-10-04 |
Foreign References:
| JP2010248561A | 2010-11-04 | |||
| JP2015081382A | 2015-04-27 | |||
| JP2009035810A | 2009-02-19 | |||
| US20140311810A1 | 2014-10-23 | |||
| JP2008133508A | 2008-06-12 | |||
| JP2002275508A | 2002-09-25 | |||
| JP2009007615A | 2009-01-15 | |||
| JP2016098393A | 2016-05-30 | |||
| JP2017179433A | 2017-10-05 | |||
| JP2016160500A | 2016-09-05 | |||
| JP2000015514A | 2000-01-18 |
Attorney, Agent or Firm:
FUKAMI PATENT OFFICE, P.C. (JP)
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