COATED CUTTING TOOL AND METHOD FOR PRODUCING THE SAME

摘要

An embodiment of the invention provides a coated cutting tool having a base material and a hard coating, in which: the hard coating is formed from a nitride or a carbonitride having an Al content of from 50 at. % to 68 at. %, a Cr content of from 20 at. % to 46 at. %, and an Si content of from 4 at. % to 15 at. %, relative to the total amount of metal (including semimetal) elements, and when the total of metal (including semimetal) elements, nitrogen, oxygen, and carbon is designated as 100 at. %, the atomic percentage (at. %) A of metal (including semimetal) elements and the atomic percentage (at. %) B of nitrogen satisfy the relationship 1.03≦B/A≦1.07; and, in an intensity profile obtained from an X-ray diffraction pattern or a selected area diffraction pattern of a transmission electron microscope, an intensity of a peak from the (200) plane or the (111) plane of a face-centered cubic lattice structure exhibits the maximum intensity.

主权项

1. A coated cutting tool, comprising a base material and a hard coating disposed on a surface of the base material, wherein:
the hard coating is formed from a nitride or a carbonitride having an aluminum (Al) content of from 50 at. % to 68 at. %, a chromium (Cr) content of from 20 at. % to 46 at. %, and a silicon (Si) content of from 4 at. % to 15 at. %, with respect to a total amount of metal (including semimetal) elements, and when a total of metal (including semimetal) elements, nitrogen, oxygen, and carbon is designated as 100 at. %, an atomic percentage (at. %) A of metal (including semimetal) elements and an atomic percentage (at. %) B of nitrogen satisfy the relationship 1.03≦B/A≦1.07; and in an intensity profile obtained from an X-ray diffraction pattern or a selected area diffraction pattern of a transmission electron microscope, an intensity of a peak from a (200) plane or a (111) plane of a face-centered cubic lattice structure exhibits a maximum intensity.