초록 ▼

There is now provided a method of manufacturing a sintered body of titanium-based carbonitride alloy comprising hard constituents in 5-25% binder phase where the hard constituents contain, in addition to Ti, one or more of the metals V, Nb, Ta, Cr, Mo or W and the binder phase is based on cobalt and

There is now provided a method of manufacturing a sintered body of titanium-based carbonitride alloy comprising hard constituents in 5-25% binder phase where the hard constituents contain, in addition to Ti, one or more of the metals V, Nb, Ta, Cr, Mo or W and the binder phase is based on cobalt and/or nickel by powder metallurgical methods, i.e., milling, pressing and sintering. The composition of the hard constituents is: 0.88a,Tab,Nbc,Vd)x(Moe,Wf)y(Cg,Nh)z. Favorable properties are obtained if the alloy is made from a powder mixture comprising: 23-28% by weight Ti(C,N) with a nitrogen content between 9 and 13% by weight; 13-17% by weight (Ti,Ta)(C,N) with a Ti/Ta ratio of 80/20; 14-18% by weight (Ti,Ta)C with a Ti/Ta ratio of 50/50; 15-20% by weight WC; and 3-7% by weight Mo2C provided that the total amount of said five powders is >78% by weight and <83% by weight.

대표청구항 ▼

A method of manufacturing a titanium-based carbonitride alloy comprising hard constituents in a binder phase based on a metal taken from the group consisting of cobalt, nickel and mixtures thereof where the composition of the hard constituent phase is represented by the formula with molar indexes: (

A method of manufacturing a titanium-based carbonitride alloy comprising hard constituents in a binder phase based on a metal taken from the group consisting of cobalt, nickel and mixtures thereof where the composition of the hard constituent phase is represented by the formula with molar indexes: (Tia, Tab, Nbc, Vd)x(Moe, Wf)y(Cg, Nh)z where: 0.88a0.96; 0.04b0.08; 0≤c0.04; 0≤d0.04; 0.60f0.73; 0.80x0.90; 0.31h0.40; a+b+c+d=1; e+f=1; g+h=1; x+y=1; and 0z1; comprising forming a powder mixture containing the following powders: 23-28% by weight Ti(C,N) with a nitrogen content between 9 and 13% by weight; 13-17% by weight (Ti,Ta)(C,N) with a Ti/Ta ratio of 80/20; 14-18% by weight (Ti,Ta)C with a Ti/Ta ratio of 50/50; 15-20% by weight WC; and 3-7% by weight Mo2C provided that the total amount of said powders is >78% by weight and 83% by weight and the remaining starting materials are added as TiN, NbC, VC, Co and/or Ni, pressing the powder mixture and sintering the pressed mixture to form the said carbonitride alloy.