US 12,435,396 B2
Cemented carbide and cutting tool
Yasuki Kido, Osaka (JP); Yoshihiro Kimura, Osaka (JP); and Anongsack Paseuth, Osaka (JP)
Assigned to SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka (JP)
Appl. No. 18/714,829
Filed by Sumitomo Electric Industries, Ltd., Osaka (JP)
PCT Filed Sep. 26, 2023, PCT No. PCT/JP2023/035008
§ 371(c)(1), (2) Date May 30, 2024,
PCT Pub. No. WO2025/069212, PCT Pub. Date Apr. 3, 2025.
Prior Publication US 2025/0101551 A1, Mar. 27, 2025
Int. Cl. C22C 29/08 (2006.01); B22F 3/16 (2006.01); B22F 3/24 (2006.01); B23B 27/14 (2006.01); C22C 1/051 (2023.01); C22C 19/07 (2006.01); C22C 29/02 (2006.01); C22C 29/06 (2006.01)
CPC C22C 29/08 (2013.01) [B22F 3/16 (2013.01); B22F 3/24 (2013.01); B23B 27/148 (2013.01); C22C 1/051 (2013.01); C22C 19/07 (2013.01); C22C 29/02 (2013.01); C22C 29/067 (2013.01); B22F 2003/248 (2013.01); B22F 2301/15 (2013.01); B22F 2301/25 (2013.01); B22F 2301/30 (2013.01); B22F 2302/10 (2013.01); B22F 2302/15 (2013.01); B22F 2998/10 (2013.01); B22F 2999/00 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A cemented carbide comprising a plurality of tungsten carbide grains and a binder phase,
wherein the cemented carbide comprises the tungsten carbide grains and the binder phase in a total of 89% by volume or more,
the cemented carbide comprises 1.5% by volume or more and 23% by volume or less of the binder phase,
the binder phase contains 40% by mass or more of cobalt,
the binder phase contains silicon, and the binder phase further contains at least one first element selected from the group consisting of phosphorus, and tin,
the first element is not segregated in a first interface region between the tungsten carbide grains that are adjacent to each other, and
the first element is not segregated in a second interface region between the tungsten carbide grain and binder phase that are adjacent to each other,
in the binder phase, a percentage {M1/(M1+M2)}×100 of a mass M1 of the first element to a total M1+M2 of the mass M1 of the first element and a mass M2 of cobalt is 1% or more and 6% or less.