Surface-coated TiN-based cermet cutting tool in which hard coating layer exhibits excellent chipping resistance

A surface-coated TiN-based cermet cutting tool, comprising:

• a body;
• and
• a hard coating layer formed on a surface of the body,
• wherein a TiN-based cermet containing a TiN phase as a hard phase component is used as the body,
• wherein the hard coating layer includes at least one layer of a titanium carbonitride layer and an aluminum oxide layer,
• wherein the body has a linear expansion coefficient of 9.0×10−6 (/K) or more and a thermal conductivity of 30 (W/m·K) or more,
• each of the titanium carbonitride layer and the aluminum oxide layer constituting the hard coating layer has a residual compressive stress of 600 to 2,000 MPa,
• wherein the TiN-based cermet consists of 70 to 94 area % of the TiN phase, 1 to 25 area % of a Mo2C phase, and a remainder of a binder phase,
• a component of the binder phase consists of Fe and Ni,
• a total area ratio of Fe and Ni is 5 to 15 area %, and
• an amount of Ni with respect to a total amount of Fe and Ni is 15 to 35 mass %.