Titanium carbonitride powder and method for manufacturing titanium carbonitride powder
AssigneeSumitomo Electric Industries, Ltd.
InventorsKosuke FUKAE, Masato MICHIUCHI, Keiichi TSUDA
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Abstract
A titanium carbonitride powder for use as a starting material for a hard material satisfies a D50 of from 2.0 μm to 6.0 μm and a D10/D90 of from 0.20 to 0.50, wherein D50 is a particle size at a cumulative percentage of 50% of a particle size distribution by volume, D10 is a particle size at a cumulative percentage of 10% of the particle size distribution by volume, and D90 is a particle size at a cumulative percentage of 90% of the particle size distribution by volume.
Claims6
A titanium carbonitride powder for use as a starting material for a hard material, the titanium carbonitride powder satisfying:
- a D50 of from 2.0 μm to 6.0 μm;
- and
- a D10/D90 of from 0.20 to 0.50,
- wherein D50 is a particle size at a cumulative percentage of 50% of a particle size distribution by volume, D10 is a particle size at a cumulative percentage of 10% of the particle size distribution by volume, and D90 is a particle size at a cumulative percentage of 90% of the particle size distribution by volume.
A method for manufacturing a titanium carbonitride powder, comprising:
- a providing step of providing starting powders including titanium oxide powder and carbon powder;
- a mixing step of mixing the starting powders without pulverization to obtain a mixed powder;
- and
- a heat treatment step of heating the mixed powder in a nitrogen-containing atmosphere at a temperature of from higher than 2,000° C. to 2,500° C. to obtain a titanium carbonitride powder.
Dependencies are inferred from the claim text.