PRECISION CUTTING TOOL

摘要

PROBLEM TO BE SOLVED: To provide a precision cutting tool comprising a cBN sintered body and having high hardness, high strength and excellent heat resistance. SOLUTION: This tool for precision cutting has a edge of a cubic boron nitride sintered body comprising cubic borom nitride having a mean particle diameter of 0.5 μm or less. The ratio of a diffraction intensity I220 of an X-ray diffraction ray 220 in the optional direction to a diffraction intensity I111 of an X-ray diffraction ray 111 of the cubic boron nitride sintered body of the edge part is 0.05 or more. And this tool for precision cutting does not substantially include an inclusion in the granular boundary.