Improvement of Preparation of Cubic Boron Nitride Dispersed WC-10Co Composites

WC-10Co nanocomposite powders were produced by continuous spray pyrolysis & carbonization technology and Ti-coated cubic boron nitride(CBN) was prepared by using chemical vapor deposition.Hot-pressing sintering technology was used to prepare CBN-WC-10Co composites at 1 380 ℃ under 30 MPa for 60 minutes.The microstructure,density,transverse rupture strength (TRS),and bonding conditions between CBN and ultrafine WC-10Co matrix were studied.The average grain size of WC grains is 400 nm,TRS of CBN-WC-10Co composites is more than 750 MPa and the relative density is 94.2%.CBN-WC-10Co composites with homogeneous microstructure and good mechanical properties are obtained.