COATED CUTTING TOOL INSERT

摘要

PROBLEM TO BE SOLVED: To provide a CVD-coated cutting tool favorable for the cutting operation of severe requests for abrasion and toughness.SOLUTION: The coated cutting tool includes a coating and a substrate. The substrate is at least partly coated with a 4-10 μm thick coating comprising two adjacent Ti(C,N)-layers where the difference Δ between the residual stress state of the inner layer and the residual stress state of the outer layer satisfies 1,000 MPa≤Δ≤2,500 MPa, on at least a part of the cutting edge and/or on at least a part of the rake face.