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| Effect of the Partial Substitution of Co by Cu on the Properties of Ultrafine Cemented Carbide |
| LIN Nan1, WU Chonghu2, ZHANG Duanfeng1, JIANG Yao1, HE Yuehui1 |
1.State key laboratory for powder metallurgy, Central South University, Changsha 410083
2.Xiamen golden egret special alloy company, Xiamen 361021 |
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Cite this article:
LIN Nan WU Chonghu ZHANG Duanfeng JIANG Yao HE Yuehui. Effect of the Partial Substitution of Co by Cu on the Properties of Ultrafine Cemented Carbide. Chin J Mater Res, 2011, 25(6): 667-672.
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Abstract Based on the same crystal structure and atomic structure of Cu and Co, coprecipitation method was taken to fabricate the ultrafine cemented carbide with Cu partly instead of Co. The effect of Cu on the properties of WC–10Co cemented carbide was investigated. The results show that with the addition of Cu by coprecipitation method, the Co(Cu) solid solution forms, and since Cu can distribute uniformly in WC–10Co during sintering,, the solubility of WC in binding phase decreases, the re–precipitation of dissolved WC particles can be hindered effectively, which results in the repression of WC grains growth, and the hardness of cemented carbide increases. The addition of element Cu can also play a role in solid solution strengthening of binding phase improving the transverse rupture strength of cemented carbide. When the Cu content is 1.5 wt%, cemented carbide can obtain the best mechanical properties with the hardness increasing from HRA92.6 to HRA 93.2 and the transverse rupture strength increasing from 2490 MPa to 2150 MPa.
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Received: 26 July 2010
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| Fund: Supported by National Science Foundation for Distinguished Young Scholars of China No.50825102, National Science Foundation of China Nos.50823006 and 50721003. |
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