US 11,951,550 B2
Cemented carbide and tool containing the same
Yasuki Kido, Osaka (JP); Katsumi Okamura, Osaka (JP); and Takashi Sekiya, Osaka (JP)
Assigned to SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka (JP)
Appl. No. 17/790,129
Filed by Sumitomo Electric Industries, Ltd., Osaka (JP)
PCT Filed Jan. 20, 2022, PCT No. PCT/JP2022/002016
§ 371(c)(1), (2) Date Jun. 30, 2022,
PCT Pub. No. WO2023/139726, PCT Pub. Date Jul. 27, 2023.
Prior Publication US 2023/0226617 A1, Jul. 20, 2023
Int. Cl. B32B 27/14 (2006.01); B23B 27/14 (2006.01); C22C 29/08 (2006.01)
CPC B23B 27/148 (2013.01) [C22C 29/08 (2013.01); B23B 2224/00 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A cemented carbide comprising tungsten carbide grains and a binder phase,
wherein a total content of the tungsten carbide grains and the binder phase in the cemented carbide is no less than 80 vol %,
a content of the binder phase in the cemented carbide is no less than 0.1 vol % and no more than 20 vol %,
in a histogram showing distribution of orientation differences between adjacent pairs each consisting of two of the tungsten carbide grains adjacent to each other in the cemented carbide, a first peak is present in a class of the orientation differences of no less than 29.5° and less than 30.5°,
the classes along a horizontal axis of the histogram indicate the orientation differences, and a width of the class is 1.0°, and
a frequency along a vertical axis of the histogram indicates a ratio of the number of the adjacent pairs belonging to each class to the number of all of the adjacent pairs in the cemented carbide.