Patent ID: 8034438

Claim:
A cutting tool insert, comprising: a cemented carbide body; and a coating, wherein the cemented carbide body comprises: WC; 5.0-7.0 wt-% Co; 0.22-0.43 wt %-Cr; and wherein the cemented carbide body has a coercivity, Hc, of about 19-28 kA/m; and wherein the coating comprises one layer of (Ti x Al 1-x )N, where x is about 0.25-0.50, with a crystal structure of NaCl type and a total thickness of the layer of (Ti x Al 1-x )N of about 3.0-5.0 μm, measured on the middle of the flank face with a compressive residual strain of about 2.5×10 −3 and 5.0×10 −3 , and with a texture coefficient TC(200) of about 1.6-2.1, 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(hk1)=intensity of the (hk1) reflection I o (hk1)=standard intensity according to JCPDS card no 38-1420 N=number of reflections used in the calculation (hk1) reflections used are: (111), (200), and (220).