Carbonitride-type cermet cutting tool having excellent wear resistance

A carbonitride-type cermet cutting tool having excellent wear resistance, wherein said cermet cutting tool has a composition comprising 5 through 20% by volume of a Co--Ni-type alloy binder phase;

• and the balance being a homogeneous complex-carbonitride phase which comprises Ti, W, and Nb and/or Ta, and incidental impurities, and wherein said cermet cutting tool has a microstructure in which the grains of said complex-carbonitride phase have grown in the shape of a cashew nut during a sintering process, and said binder phase is distributed as a dispersed phase between the grains of said complex-carbonitride phase.

A carbonitride-type cermet cutting tool having excellent wear resistance, wherein said cermet cutting tool has a composition comprising 1 through 20% by volume of a titanium carbonitride phase;

• 5 through 20% by volume of a Co--Ni-type alloy binder phase;
• and the balance being a homogeneous complex-carbonitride phase which comprises Ti, W, and Nb and/or Ta, and incidental impurities, and wherein said cermet cutting tool has a microstructure in which the grains of said complex-carbonitride phase have grown in the shape of a cashew nut during a sintering process, said binder phase is present as a dispersed phase between the grains of said complex-carbonitride phase, and said titanium carbonitride phase is distributed as a dispersed phase within said binder phase, within said complex-carbonitride phase, encroaching on said complex-carbonitride phase, and/or contacting with said complex-carbonitride phase.

A carbonitride-type cermet cutting tool having excellent wear resistance, wherein said cermet cutting tool has a composition comprising 2 through 20% by volume of a titanium carbonitride phase;

• 5 through 20% by volume of a Co--Ni-type alloy binder phase;
• and the balance being a homogeneous complex-carbonitride phase which comprises Ti, W, and Nb and/or Ta, and incidental impurities, and wherein said cermet cutting tool has a microstructure in which the grains of said complex-carbonitride phase have grown in the shape of a cashew nut during a sintering process, said binder phase is present as a dispersed phase between the grains of said complex-carbonitride phase, and said titanium carbonitride phase is distributed as a dispersed phase within said binder phase, within said complex-carbonitride phase, encroaching on said complex-carbonitride phase, and/or contacting with said complex-carbonitride phase.

A carbonitride-type cermet cutting tool having excellent wear resistance, wherein said cermet cutting tool has a composition comprising 1 through 16% by volume of a homogeneous first complex-carbonitride phase which comprises Ti, and M selected from W, Nb or Ta;

• 5 through 20% by volume of a Co--Ni-type alloy binder phase;
• and the balance being a homogeneous second complex-carbonitride phase which comprises Ti, W, and Nb and/or Ta, and incidental impurities, and wherein said cermet cutting tool has a microstructure in which the grains of said second complex-carbonitride phase have grown in the shape of a cashew nut during a sintering process, said binder phase is present as a dispersed phase between the grains of said second complex-carbonitride phase, and said first complex-carbonitride phase is distributed as a dispersed phase within said binder phase, within said second complex-carbonitride phase, encroaching on said second complex-carbonitride phase, and/or contacting with said second complex-carbonitride phase.

A carbonitride-type cermet cutting tool having excellent wear resistance, wherein said cermet cutting tool has a composition comprising 2 through 16% by volume of a homogeneous first complex-carbonitride phase which comprises Ti, and M selected from W, Nb or Ta;

• 5 through 20% by volume of a Co--Ni-type alloy binder phase;
• and the balance being a homogeneous second complex-carbonitride phase which comprises Ti, W, and Nb and/or Ta, and incidental impurities, and wherein said cermet cutting tool has a microstructure in which the grains of said second complex-carbonitride phase have grown in the shape of a cashew nut during a sintering process, said binder phase is present as a dispersed phase between the grains of said second complex-carbonitride phase, and said first complex-carbonitride phase is distributed as a dispersed phase within said binder phase, within said second complex-carbonitride phase, encroaching on said second complex-carbonitride phase, and/or contacting with said second complex-carbonitride phase.

A carbonitride-type cermet cutting tool having excellent wear resistance, wherein said cermet cutting tool has a composition comprising 1 through 16% by volume of a homogeneous first complex-carbonitride phase which comprises Ti, and M selected from W, Nb or Ta;

• 1 through 20% by volume of a titanium carbonitride phase;
• 5 through 20% by volume of a Co--Ni-type alloy binder phase;
• and the balance being a homogeneous second complex-carbonitride phase which comprises Ti, W, and Nb and/or Ta, and incidental impurities, and wherein said cermet cutting tool has a microstructure in which the grains of said second complex-carbonitride phase have grown in the shape of a cashew nut during a sintering process, said binder phase is present as a dispersed phase between the grains of said second complex-carbonitride phase, and said first complex-carbonitride phase and said titanium carbonitride phase are distributed as dispersed phases within said binder phase, within said second complex-carbonitride phase, encroaching on said second complex-carbonitride phase, and/or contacting with said second complex-carbonitride phase.

A carbonitride-type cermet cutting tool having excellent wear resistance, wherein said cermet cutting tool has a composition comprising 2 through 16% by volume of a homogeneous first complex-carbonitride phase which comprises Ti, and M selected from W, Nb or Ta;

• 1 through 20% by volume of a titanium carbonitride phase;
• 5 through 20% by volume of a Co--Ni-type alloy binder phase;
• and the balance being a homogeneous second complex-carbonitride phase which comprises Ti, W, and Nb and/or Ta, and incidental impurities, and wherein said cermet cutting tool has a microstructure in which the grains of said second complex-carbonitride phase have grown in the shape of a cashew nut during a sintering process, said binder phase is present as grains of a dispersed phase between the grains of said second complex-carbonitride phase, and said first complex-carbonitride phase and said titanium carbonitride phase are distributed as dispersed phases within said binder phase, within said second complex-carbonitride phase, and/or contating with said second complex-carbonitride phase.