Patent ID: 7985471

Claim:
A cutting tool insert, comprising a cemented carbide body and a coating, wherein the cemented carbide body comprises: WC, about 4.5-6.5 wt-% Co; and about 3-10 wt-% of at least one cubic carbide forming metal selected from the group consisting of groups IVb, Vb and VIb of the periodic table; wherein the cemented carbide body has an S-value of about 0.77-0.92 and a coercivity of about 10-20 kA/m adjacent; wherein the coating comprises an uppermost layer, wherein the uppermost layer is about 7-12 μm thick; wherein the uppermost layer comprises an α-Al 2 O 3 layer textured in the <006>-directions with a texture coefficient TC(006) greater than about 2, TC(012), TC(110), TC(113), TC(202), TC(024) and TC(116) are simultaneously all less than about 1, and TC(104) being the second highest texture coefficient, the texture coefficient TC(hkl) being defined by: TC ⁡ ( hkl ) = I ⁡ ( hkl ) I 0 ⁡ ( hkl ) ⁡ [ 1 n ⁢ ∑ n = 1 n ⁢ I ⁡ ( hkl ) I 0 ⁡ ( hkl ) ] - 1 where I(hkl)=measured intensity of the (hkl) reflection; Io(hkl)=standard intensity according to JCPDS card no 46-1212; n=number of reflections used in the calculation (8); (hkl) reflections used are: (012), (104), (110), (006), (113), (202), (024) and (116).