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CEMENTED CARBIDE AND CUTTING TOOL
A cemented carbide including a hard phase, a binding phase, and inevitable impurities. The hard phase satisfies a first hard phase composed mainly of tungsten carbide, and a second hard phase composed mainly of a compound. The compound contains multiple types of metallic elements including tungsten and at least one element selected from carbon, nitrogen, oxygen, and boron. The second hard phase satisfies D10/D90 < 0.4, wherein D10 denotes a cumulative 10% grain size in an area-based grain size distribution on a surface or cross section of the cemented carbide, and D90 denotes a cumulative 90% grain size in the area-based grain size distribution, and satisfies à 2 < 5.0, wherein à 2 denotes the variance of the distance between the centroids of the nearest two of the second hard phases. The average grain size D W of the first hard phase ranges from 0.8 to 4.0 µm and satisfies D M /D W < 1.0, wherein D M denotes the average grain size of the second hard phase.
CEMENTED CARBIDE AND CUTTING TOOL
A cemented carbide including a hard phase, a binding phase, and inevitable impurities. The hard phase satisfies a first hard phase composed mainly of tungsten carbide, and a second hard phase composed mainly of a compound. The compound contains multiple types of metallic elements including tungsten and at least one element selected from carbon, nitrogen, oxygen, and boron. The second hard phase satisfies D10/D90 < 0.4, wherein D10 denotes a cumulative 10% grain size in an area-based grain size distribution on a surface or cross section of the cemented carbide, and D90 denotes a cumulative 90% grain size in the area-based grain size distribution, and satisfies à 2 < 5.0, wherein à 2 denotes the variance of the distance between the centroids of the nearest two of the second hard phases. The average grain size D W of the first hard phase ranges from 0.8 to 4.0 µm and satisfies D M /D W < 1.0, wherein D M denotes the average grain size of the second hard phase.
CEMENTED CARBIDE AND CUTTING TOOL
HARTMETALL UND SCHNEIDWERKZEUG
CARBURE MÉTALLIQUE ET OUTIL DE COUPE
KIDO YASUKI (author) / MATSUKAWA MICHIKO (author) / TSUDA KEIICHI (author)
2020-06-24
Patent
Electronic Resource
English
CEMENTED CARBIDE MATERIAL FOR CUTTING TOOL, AND CUTTING TOOL
| European Patent Office | 2023