Patent ID: 7135221
Filing Date: 2006-11-14
Classification: B22F,C22C,C23C,Y10T

Abstract:
1. A cutting tool insert comprising: a cemented carbide substrate; and a coating, wherein the cemented carbide substrate comprises WC, 7 to 12 wt-% Co and 5 to 11 wt-% of cubic carbides of metals from groups IVb, Vb and VIb of the periodic table, a Co-binder that is highly alloyed with W and has an S-value of 0.79 to 0.89, a tungsten carbide phase having a mean intercept length of 0.7 to 1.4 μm, wherein the coating comprises at least one 2 to 12 μm alumina layer including columnar α-Al wherein TC(012)>2.2 and TC(024)>0.6×TC(012), and wherein texture coefficient TC(hkl) is defined as where I(hkl)=measured intensity of (hkl) reflection I n=number of reflections used in calculation.