CUTTING TOOL AND METHOD FOR MANUFACTURING CUT PRODUCT USING SAME

摘要

Provided is a cutting tool in which a cutting edge is provided at a tip portion of a base body, wherein the coating performance required for both the cutting edge and a chip discharge section is satisfied. A cutting tool such as a drill (1) in which a coating layer (6) is provided to the surface of a base body (5) having a rod shape, which is equipped with a cutting edge (2) provided to at least the tip portion (A) of the base body (5) having a rod shape and a chip discharge section (4) provided adjacent to the cutting edge (2) so as to extend rearwards (i.e., towards the rear end (B)) from the tip portion (A), the coating layer (6) comprising a mixture phase of diamond and graphite and having a diamond content ratio which is lower in a rear end (B) located 10 mm rearward from the tip than in the tip portion (A).