Patent ID: 7989092

Claim:
A cutting tool insert having a flank face, comprising: a. a cemented carbide body having an edge radius, comprising: tungsten carbide (WC); about 4.0 wt-% to about 7.0 wt-% cobalt (Co); about 0.25 wt-% to about 0.50 wt-% chromium (Cr); and wherein said cemented carbide body has a coercivity, Hc, of about 28 kA/m to about 38 kA/m; and b. a single layer coating comprising (Ti 1-x Si x )N, wherein x is between about 0.1 and about 0.25; wherein said layer has a crystal structure of NaCl type and a total thickness of between 0.5 μm and 2.0 μm measured on the middle of said flank face; wherein said layer has a texture coefficient TC(200)>about 2.0, the texture coefficient (TC) being defined as: TC ⁡ ( hkl ) = I ⁡ ( hkl ) I 0 ⁡ ( hkl ) ⁡ [ 1 n ⁢ ∑ n = 1 n ⁢ I ⁡ ( hkl ) I 0 ⁡ ( hkl ) ] - 1 where: I(hkl)=intensity of the (hkl) reflection; I o (hkl)=standard intensity according to JCPDS card no 38-1420; n=number of reflections used in the calculation; (hkl) reflections used are: (111), (200), (220).