Influence of sintering temperature on microstructure and mechanical properties of WC-8Ni cemented carbide produced by vacuum sintering |
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| Affiliation: | 1. Center for High Technology Development, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Street, Cau Giay District, Hanoi, Vietnam;2. Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Street, Cau Giay District, Hanoi, Vietnam;1. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China;2. Advanced Corporation for Materials & Equipments, Changsha 410118, China;3. Engineering Research Center of High-efficiency Development and Application Technology of Tungsten Resources, Ministry of Education, Ganzhou 341000, China |
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| Abstract: | 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 °C up to 1500 °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 °C. At which the relative density, hardness and fracture toughness (KIC) of the samples are 99.81%, 13.23 GPa and 24.22 MPa m1/2, respectively. The effect of η-phase identified by Murakami etching method and XRD technique on the mechanical properties was also discussed. |
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| Keywords: | WC-Ni cemented carbide Vacuum sintering Hardness Facture toughness η-Phase |
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