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Characterizations and mechanical properties of impregnated diamond segment using Cu-Fe-Co metal matrix

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Abstract

Diamond impregnated Cu-Fe-Co based saw-blade segments are directly processed by vacuum and pressure-assisted sintering at different temperature, with the purpose of reducing the cobalt content in diamond tools. Copper and iron are used as the bonding elements and cobalt-chrome pre-alloyed powder is used as the hardening phase. Effects of sintering temperature on microstructures and mechanical properties of the sintered matrix and diamond graphitization were investigated by X-ray diffraction analysis, electron probe micro-analyzer, universal testing machine, digital Rockwell hardness tester and Raman scattering analyzer. Results showed that microstructures of the sintered matrix were refined and porosities in the sintered matrix were closed to a more spherical-like shape with the increase of the sintering temperature. Densification, hardness and tensile strength of the matrix sintered at 820 °C were 12.75%, 2.72% and 156.38% higher than that of the matrix sintered at 740 °C, respectively. Diamond graphitization was not occurred at 820 °C. The hardness and the tensile strength rose 32.8% and 13.5%, respectively, after 7.5 h ageing treatment. The matrix densification ascent and the dispersed distribution of Co-Cr pre-alloyed powders contributed a hardness improvement and a tensile strength improvement to the Cu-Fe based matrix.

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Authors and Affiliations

  1. State Key Laboratory of Advanced Non-Ferrous Materials, Lanzhou University of Technology, Lanzhou, 730050, China

    Wensheng Li, Jie Zhan, Hongfeng Dong, Yaming Li & Yi Liu

  2. National Center for Advanced Tribology, School of Engineering Sciences, University of Southampton, Southampton, SO17 1BJ, UK

    Shucai Wang

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  1. Wensheng Li
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  2. Jie Zhan
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  3. Shucai Wang
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  4. Hongfeng Dong
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  5. Yaming Li
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  6. Yi Liu
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Correspondence to Jie Zhan.

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Li, W., Zhan, J., Wang, S. et al. Characterizations and mechanical properties of impregnated diamond segment using Cu-Fe-Co metal matrix. Rare Metals 31, 81–87 (2012). https://doi.org/10.1007/s12598-012-0467-x

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  • DOI: https://doi.org/10.1007/s12598-012-0467-x

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