| abstract |
A coated cutting tool includes a rake face, a flank face, and a cutting edge region between and adjoining the flank face and the rake face in a nose area of a cutting tool insert. The cutting edge region is intersected by an edge line and defines a cutting edge sector that defines an cutting edge radius, r e . The coated cutting tool includes a substrate with a coating having a thickness between 1 μm and 40 μm, where the coating includes an α-Al 2 O 3 layer and an MTCVD TiCN layer located between the substrate and the α-Al 2 O 3 layer. The α-Al 2 O 3 layer exhibits a texture coefficient TC(hkl), as measured by X-ray diffraction using CuKa radiation and θ-2θ scan, defined according to Harris formula n n n n n n T n n n C n n ( n n h n n k n n l n n ) n n n = n n n n n I n n ( n hkl n ) n n n n I n 0 n n ( n n h n n k n n l n n ) n n n [ n n n 1 n n n n n n n ∑ n n n n = n 1 n n n n n n n I n n ( n hkl n ) n n n n I n 0 n n ( n n h n n k n n l n n ) n n n n n ] n n n - n 1 n n n n n n n where I(hkl) is the measured integrated area intensity of the (hkl) reflection with corresponding reference intensity I 0 (hkl), and n is the number of reflections used in the calculation. |