Influence of sintering temperature on microstructure and mechanical properties of WC-8Ni cemented carbide produced by vacuum sintering

摘要

The WC-8Ni powder was prepared by the ball milling method, then consolidated via a vacuum sintering technique. The influence of sintering temperature varying from 1375 degrees C up to 1500 degrees C on microstructure and mechanical properties of WC-8Ni cemented carbide was investigated. The best mechanical properties of the samples have been achieved at sintering temperature of 1450 degrees C. At which the relative density, hardness and fracture toughness (K-IC) of the samples are 99.81%, 13.23 GPa and 24.22 MPa m(1/2), respectively. The effect of eta-phase identified by Murakami etching method and XRD technique on the mechanical properties was also discussed. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.