CUTTING INSERT HAVING GOOD FASTENING FORCE AND GOOD HEAT CONDUCTIVITY

摘要

The present invention relates to a cutting insert capable of improving the fastening force and thermal conductivity of a cutting insert when the cutting insert is fastened to a holder provided in a main body of the tool, thereby improving the life of the cutting insert. The cutting insert according to the present invention includes a cutting insert having a top surface, a bottom surface, a side connecting the top surface and the bottom surface, and a picked portion formed by the top surface and the side surface, And a coupling assisting layer formed to be inserted or coated so as to cover a part or all of the coupling surfaces to be fastened to the cutting insert, wherein the coupling assisting layer is formed on the hard coating formed on the base material of the base material constituting the cutting insert or on the base material of the cutting insert And is made of a material having a low hardness, good ductility, and high thermal conductivity.