TI (C, N) - (TI, NB, W) (C, N) -CO ALLOY FOR TURNING TOOLS IN HIGH-LEVEL MANUFACTURING

摘要

The present invention relates to a titanium based carbonitride alloy containing Ti, Nb, W, C, N and Co for metal cutting applications, in particularly general finishing and semifinishing turning operations. The alloy contains in addition to Ti Co with only impurity levels of Ni and Fe, 4-7 at% Nb, 3-8 at% W and has a C/(C+N) ratio of 0.50-0.75. The Co content is 9-12 at% for general finishing applications and 12-16% for semifinishing applications. The amount of undissolved Ti(C,N) cores (A) should be kept between 26 and 37 vol% of the hard constituents, the balance being one or more complex carbonitrides (B) containing Ti, Nb and W. The invented alloy is particularly useful for semifinishing of steel and cast iron.