Patent ID: 11433459

Abstract:
A covered cutting tool having a cemented carbide and a covering layer formed on the cemented carbide. The covered cutting tool includes a rake face, a flank face, and a cutting edge line part located between the rake face and the flank face. The coating layer includes a compound layer containing a compound having a composition represented by (AlxTi1-x)N. The average thickness T1 of the covering layer in the cutting edge line part and the average thickness T2 of the coating layer in the rake face at a position 2 mm or more away from the cutting edge line part toward the rake face are within specific ranges and satisfy T2<T1. The residual stress S1 of the cemented carbide in the cutting edge line part and the residual stress S2 of the cemented carbide in the rake face at a position 2 mm or more away from the cutting edge line part toward the rake face satisfy S2<S1.