Patent ID: 6231277
Filing Date: 2001-05-15
Classification: B22F,B23B,C22C,Y10T

Abstract:
A cermet tool having a structure including a bonding phase and a hard phase, said bonding phase being predominantly formed of Ni or Ni and Co, and said hard phase being formed of a carbonitride phase containing Ti, and at least one other metal selected from the group consisting of V, Cr, Zr, Nb, Mo, Hf, ta, and W and mixtures thereof, wherein the cermet tool comprisesNi or Ni and Co in a total amount of 4-20 wt. %,Ti in an amount of 50-60 wt. %,at least one of V, Cz, Zr, Nb, Mo, Hf, Ta, and W in a total amount of 30-40 wt. %,C in an amount of 5-10 wt. %, andN in an amount of 3-8 wt. %;and wherein the carbonitride phase contains grains of the Ti carbonitride phase containing a metal component Ti in an amount of 90 wt. % or more with respect to all the metal components of the phase; and wherein a cross-sectional microcrystalline structure of the cermet shows the ratio of ""total area of grains of the Ti carbonitride phase having an aspect ratio of 1.5 or more"" to ""total area of the hard phase"" to be 50% or more.