HARD MATERIAL CLAD WITH DIAMOND, THROWAWAY CHIP, AND METHOD OF MAKING SAID MATERIAL AND CHIP.

摘要

A diamond-clad hard material having high adhesion strength to a base material and a diamond-clad throwaway chip capable of cutting various kinds of light metals such as Al-Si alloy at high speed for along period of time, wherein the diamond-clad hard material is composed of a material to be sintered which is constituted mainly of Si3N4, has a sintered skin at least at a part thereof, and is clad with diamond at least at said sintered skin; and the throwaway chip is commposed of a base material constituted mainly of Si3N4 and a clad layer in thickness of 0.1 SIMILAR 200 mu m of diamond or/and diamond-like carbon vapor-deposited on the surface of the base material and is characterized by being clad with a layer of diamond or/and diamond-like carbon partly or entirely on the surface having a sintered skin property of the base material thereof: thereby effectively achieving the object.