Cermet and cutting tool
AssigneeSumitomo Electric Industries, Ltd.
InventorsTakato Yamanishi, Keiichi Tsuda
Life of this patent
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Abstract
A cermet contains hard phase particles containing Ti and a binding phase containing at least one of Ni and Co. 70% or more of the hard phase particles have a cored structure containing a core and a peripheral portion around the core. The core is composed mainly of at least one of Ti carbide, Ti nitride, and Ti carbonitride. The peripheral portion is composed mainly of a Ti composite compound containing Ti and at least one selected from W, Mo, Ta, Nb, and Cr. The core has an average particle size α, the peripheral portion has an average particle size β, and α and β satisfy 1.1≦β/α≦1.7. The hard phase particles in the cermet have an average particle size of more than 1.0 μm.
Claims6
A cermet comprising:
- hard phase particles containing Ti;
- and a binding phase containing at least one of Ni and Co,
- wherein 70% or more of the hard phase particles have a cored structure containing a core and a peripheral portion around the core,
- the core is composed mainly of at least one of Ti carbide, Ti nitride, and Ti carbonitride,
- the peripheral portion is composed mainly of a Ti composite compound containing Ti and at least one selected from W, Mo, Ta, Nb, and Cr,
- the core has an average particle size α, the 70% or more of the hard phase particles have an average particle size β, and α and β satisfy 1.1≦β/α≦1.7, and
- the hard phase particles in the cermet have an average particle size of more than 1.0 μm.
Dependencies are inferred from the claim text.