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| Effect of vacuum sintering temperature on microstructure and properties of WC-TiC-TaC-Co cemented carbide |
| CHEN Hui,PENG Ling-ling,JIANG Zhong-tao,DENG Ying,TU Ming-jing |
| Chongqing Key Laboratory of Micro/Nano Materials Engineering and Technology, Chongqing University of Arts and Sciences, Chongqing 402160, China |
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Abstract WC-13(TiC＋TaC)-8Co-1(VC＋Cr3C2) cemented carbide was prepared by high energy ball milling and vacuum sintering process. The effect of sintering temperature on the microstructure, mechanical and magnetic properties of the WC-TiC-TaC-Co cemented carbide was investigated. Experimental results show that the alloy density increases with the improving sintering temperature, but too high sintering temperature leads to?grain growth, thus the alloy density decreases. The hardness, bend strength and coercive force of samples increase?firstly and then decrease?with?vacuum sintering?temperature increasing. The relative?saturation magnetic induction intensity of samples decreases with increasing?sintering temperature. When sintered at 1 400 ℃, the alloy has better properties with the relative density of 99.6%, bend strength of 1 992 MPa, hardness of 92.3 HRA, coercive force of 34.3 kA/m and relative saturation magnetic induction intensity of 76.5%.
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Received: 16 June 2014
Published: 17 June 2015
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2015, Vol. 25 
