Microstructure and Properties of Hot-Pressing Sintered Tungsten Carbide Composites by Adding Cubic Boron Nitride

Abstract:

(0, 5, 10, 15, 20) vol% CBN-WC/Co composites were consolidated by ball milling and the following hot-pressing sintering method. WC, Co and CBN powders were used as the starting materials. The effects of the CBN content on the density, microstructure and mechanical properties of CBN-WC/Co composites were investigated. The results showed that the CBN content had remarkable influence on the microstructure and mechanical properties of CBN-WC/Co Composites. With the increasing content of CBN, the density decrease, while Vickers hardness and flexural strength increased initially to the maximum values and then decreased at CBN 10 vol%. When 10 vol% CBN-WC/Co powders were hot-pressing sintered at 1350°C and 20MPa for 90 min, an excellent Vickers hardness of 19.8GPa was achieved, combining a flexural strength of 682MPa.

• Periodical: Key Engineering Materials (Volume 655)
• Pages: 45-48
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.655.45
• Online since: July 2015
• Authors: Kun Li, Hai Yan Chen*, Qiu Shuang He, Li Hua Dong
• Keywords: CBN-Wc/Co, Density, Mechanical Property, Microstructure

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