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

Characterizations and mechanical properties of impregnated diamond segment using Cu-Fe-Co metal matrix
Characterizations and mechanical properties of impregnated diamond segment using Cu-Fe-Co metal matrix
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.
cu-fe-co based matrix, sintering temperature, graphitization, microstructure, mechanical properties
1001-0521
81-87
Li, Wensheng
9483fd8e-f3d4-48b8-8a75-14ff5fc5d9e5
Zhan, Jie
011abe96-10b7-4f72-8ed5-32f9e12c301e
Wang, Shucai
8a390e2d-6552-4c7c-a88f-25bf9d6986a6
Dong, Hongfeng
c12ac116-f9ef-497d-bc1b-fb794c45156a
Li, Yaming
117f1147-ba56-4cae-aae2-22435d828c50
Liu, Yi
91600d7e-68d4-4130-b38c-9474544d328c
Li, Wensheng
9483fd8e-f3d4-48b8-8a75-14ff5fc5d9e5
Zhan, Jie
011abe96-10b7-4f72-8ed5-32f9e12c301e
Wang, Shucai
8a390e2d-6552-4c7c-a88f-25bf9d6986a6
Dong, Hongfeng
c12ac116-f9ef-497d-bc1b-fb794c45156a
Li, Yaming
117f1147-ba56-4cae-aae2-22435d828c50
Liu, Yi
91600d7e-68d4-4130-b38c-9474544d328c

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).

Record type: Article

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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More information

Published date: February 2012
Keywords: cu-fe-co based matrix, sintering temperature, graphitization, microstructure, mechanical properties
Organisations: nCATS Group

Identifiers

Local EPrints ID: 333444
URI: http://eprints.soton.ac.uk/id/eprint/333444
ISSN: 1001-0521
PURE UUID: 9141e07f-e93f-45c8-918e-5701cc3dba60

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Date deposited: 22 May 2012 08:47
Last modified: 14 Mar 2024 10:31

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Contributors

Author: Wensheng Li
Author: Jie Zhan
Author: Shucai Wang
Author: Hongfeng Dong
Author: Yaming Li
Author: Yi Liu

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