Abstract
With the wide application of cemented carbide, W and Co, the main raw materials for preparing cemented carbide, are depleted increasingly. Therefore, it is more and more important to prepare regenerated cemented carbide by recycling WC scrap. However, in the preparation of regenerated cemented carbide, there will be problems such as the introduction of impurity elements, discontinuous growth of grains, and high porosity. To optimize the mechanical properties of the regenerated cemented carbide, the modification of regenerated cemented carbide by adding rare earth oxides has been studied. It is found that the addition of rare earth can effectively inhibit the growth of WC grains and the formation of pores, thus avoiding the abnormal growth of WC grains. With the increase in the rare earth oxide content, the relative density, hardness, and bending strength of regenerated cemented carbide show a trend of increasing first and then decreasing. Among them, the addition of 0.5% Y2O3 has the optimal effect on improving the mechanical properties of regenerated cemented carbides. The relative density, hardness, and strength have been increased by 1.24, 9.43, and 11.37%. When the content of rare earth is more than 0.7%, the comprehensive properties of regenerated cemented carbide begin to decline.
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This work was supported by the National Natural Science Foundation of China (52275438, 51675289) and the Natural Science Foundation of Shandong Province (ZR2020ME160).
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Du, J., Wang, Y., Huai, J. et al. Effect of Rare Earth Oxide Addition on Regenerated Cemented Carbide. J. of Materi Eng and Perform (2023). https://doi.org/10.1007/s11665-023-08320-7
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DOI: https://doi.org/10.1007/s11665-023-08320-7