Effect of Co Content on the Densification, Microstructure and Mechanical Properties of cBN-WC/Co Composites

Abstract:

Hot pressing sintering process for cemented carbide preparation was investigated with cBN-WC/Co composite powders with different Co content from 4wt% to 10wt% at temperatures between 1300°C and 1400°C. The results showed that the Co content had remarkable influence on the densification and mechanical properties of cBN-WC/Co composites. Near-full densification can be obtained when cBN-WC/8wt%Co powders were sintered at temperatures at 1350°C, and pressures at 20MPa, combining an excellent Vickers hardness of 17.57GPa with an acceptable flexure strength of 601.58MPa.

• Periodical: Key Engineering Materials (Volume 655)
• Pages: 41-44
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.655.41
• Online since: July 2015
• Authors: Qiu Shuang He, Hai Yan Chen, Kun Li, Li Hua Dong
• Keywords: Hot Pressing Sintering, Mechanical Property, WC/Co Composites

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