Patent ID: 7157044

Claim:
A method of manufacturing a sintered titanium-based carbonitride alloy comprising hard constituents with undissolved Ti(C,N) cores, the method comprising: mixing hard constituent powders of TiC x N 1-x , x having a value of 0.46–0.70, NbC and WC with powder of Co, pressing the mixture into bodies of desired shape and sintering the bodies in a N 2 —CO—Ar atmosphere at a temperature in the range 1370–1500° C. for 1.5–2 h to obtain the desired amount of undissolved Ti(C,N) cores, wherein the amount of Ti(C,N) powder is 50–70 wt-% of the powder mixture, its grain size is 1–3 μm, and the sintering temperature and sintering time are chosen to give an amount of undissolved Ti(C,N) cores between 26 and 37 vol % of the hard constituents.