Characterizations and mechanical properties of impregnated diamond segment using Cu-Fe-Co metal matrix
Li, Wensheng, Zhan, Jie, Wang, Shucai, Dong, Hongfeng, Li, Yaming and Liu, Yi (2012) Characterizations and mechanical properties of impregnated diamond segment using Cu-Fe-Co metal matrix. Rare Metals, 31, (1), 81-87. (doi:10.1007/s12598-012-0467-x).
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Description/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.
| Item Type: | Article |
|---|---|
| ISSNs: | 1001-0521 (print) 1867-7185 (electronic) |
| Keywords: | cu-fe-co based matrix, sintering temperature, graphitization, microstructure, mechanical properties |
| Subjects: | Q Science > QD Chemistry T Technology > TN Mining engineering. Metallurgy |
| Divisions: | Faculty of Engineering and the Environment > Engineering Sciences > n CATS Research Group |
| Item ID: | 333444 |
| Date Deposited: | 22 May 2012 08:47 |
| Last Modified: | 22 May 2012 08:47 |
| Contributors: | Li, Wensheng (Author) Zhan, Jie (Author) Wang, Shucai (Author) Dong, Hongfeng (Author) Li, Yaming (Author) Liu, Yi (Author) |
| Date: | February 2012 |
| Status: | Published |
| URI: | http://eprints.soton.ac.uk/id/eprint/333444 |
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