Cutting tool

Abstract

[Problem] To provide a cutting tool which is formed from a cermet sintered body that is reduced in deformation due to firing and has high strength. [Solution] A cutting tool (1) which is composed of a cermet sintered body (6) that is configured of a hard phase (11) which is composed of two kinds of hard phases, namely a first hard phase (12) and a second hard phase (13), and a binder phase (14) that is composed of Co and/or Ni. At a depth of 400 μm or more from the rake face (2)-side surface of the cermet sintered body (6), the residual stress σ11[1i] in the σ11 direction of the first hard phase (12) is a compressive stress of 80 MPa or more (σ11[1i]≦−80 MPa), the residual stress σ11[2i] in the σ11 direction of the second hard phase (13) is a compressive or tensile stress of from −50 MPa to 50 MPa (σ11[2i]=−50 MPa to 50 MPa), and the residual stress σ11[bi] in the σ11 direction of the binder phase (14) is a compressive or tensile stress of from −50 MPa to 50 MPa (σ11[bi]=−50 MPa to 50 MPa) as determined by a 2D method.

Dependencies are inferred from the claim text.