| 摘要 |
PURPOSE: To produce a CBN composite cermet tool high in hardness, having a long service life and furthermore excellent in cuttability by mixing CBN particles stuck with the fine particles of TiN, Ni or the like and a base material made of Ti, N, and Ni, etc., under specified conditions and executing sintering. CONSTITUTION: The fine particles of one or more kinds selected from among TiN, TiC, Ni and Co are physically stuck to the particles of cubic boron nitride (CBN) (having about 0.5 to 5μm average particle size) by plasma coating. This CBN particles, 1 to 60vol.%, and the balance base material (having <=2μm average particle size) composed of one or more kinds among TiN, TiC, TiCN, NbC, WC and Mo2 C and one or more kinds of Ni and Co are mixed. Next, this mixture is sintered by HIP at <=1600 deg.C under <=2000 atmospheric pressure in an inert gas. Thus, the cubic boron nitride composite cermet tool excellent in strength and wear resistance can be obtd. |
