Title:
CEMENTED CARBIDE AND CUTTING TOOL
Document Type and Number:
WIPO Patent Application WO/2019/116614
Kind Code:
A1
Abstract:
Provided is a cemented carbide that has a first hard phase comprising tungsten carbide particles and a binding phase including Co, wherein the ratio Nt/Na is at least 0.9, where: Na represents a total number of WC/WC interfaces, a WC/WC interface being defined to be a region in an arbitrarily defined surface or in an arbitrarily defined cross-section of the cemented carbide where the distance X between the respective surfaces of adjacent tungsten carbide particles having an opposing surface length of at least 100 nm is at most 5 nm; and Nt represents the number of the WC/WC interfaces where the distance X is 1-5 nm, while the Co atom concentration at the WC/WC interface is higher than the mean value of Co atom concentrations inside the tungsten carbide particles.
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Inventors:
KIDO YASUKI (JP)
TABAYASHI DAIJI (JP)
IMAMURA SHINYA (JP)
TABAYASHI DAIJI (JP)
IMAMURA SHINYA (JP)
Application Number:
PCT/JP2018/025060
Publication Date:
June 20, 2019
Filing Date:
July 02, 2018
Export Citation:
Assignee:
SUMITOMO ELECTRIC HARDMETAL CORP (JP)
International Classes:
B23B27/14; C22C29/08; B23C5/16; C22C1/05
Domestic Patent References:
| WO2017191744A1 | 2017-11-09 |
Foreign References:
| JP2016020541A | 2016-02-04 | |||
| JP2003155537A | 2003-05-30 | |||
| JPH08333647A | 1996-12-17 | |||
| JP2008133508A | 2008-06-12 | |||
| JP2017023685A | 2017-02-02 | |||
| JP2004256852A | 2004-09-16 | |||
| JP2005068515A | 2005-03-17 | |||
| JP2017088917A | 2017-05-25 |
Other References:
See also references of EP 3521468A4
Attorney, Agent or Firm:
FUKAMI PATENT OFFICE, P.C. (JP)
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