PURPOSE: To provide the titled composite sintered body fit for cutting hard steel products, superior suitability to working into a tool itself, and consisting of high density phase boron nitride composed of zincblende type boron nitride and wurtzite type boron nitride and cermet having a predetermined composition.
CONSTITUTION: This sintered body contg. high density phase boron nitride consists of 15W60vol% high density phase boron nitride composed of 4W16vol% zincblende type boron nitride (Z-BN) and 96W84 vol% wurtzite type boron nitride (W-BN) and the balance cermet composed of 70W95vol% ceramic substance and 30W5vol% metal. TiC-Ni, TiC-Mo or the like is preferably used as said cermet. This composite sintered body is manufactured by mixing powders of W-BN, Z-BN, ceramic substance and metal followed by sintering at 1,200W1,800°C under 4W70 Pa pressure.
ARAKI MASATOU
SAITOU SHINROKU
AKASHI TAMOTSU
| JPS5466910A | 1979-05-29 | |||
| JPS5377811A | 1978-07-10 | |||
| JPS53136015A | 1978-11-28 | |||
| JPS4944014A | 1974-04-25 | |||
| JPS4944015A | 1974-04-25 | |||
| JPS5219208A | 1977-02-14 |