Influence of Cu Content on the Properties of the Al-based Binding Agent and Diamond Tool
XU Junjie1, WAN Long1, SONG Dongdong2, WANG Junsha2, LI Yingying2, LIU Yingying2
1 College of Materials Science and Engineering,Hunan University, Changsha 410082; 2 Ultra-precision Grinding Experiment Center, Hunan University, Changsha 410082
Abstract: Diamond tool was fabricated by hot pressed sintering method using Al-Cu-Mg-Ti-Cr metal powder as binding agent. Effects of Cu content on the properties of the Al-based binding agent and diamond tool were studied. Results showed that the bending strength and the relative density of Al-based binding agent increased first and then decreased with the increase of Cu content, while its hardness experienced a continuous increase. Due to the addition of Cu, the strengthening phase of Al2CuMg and the dispersion phases of Al3Ti and Al2Cr were formed, and the grains were refined, which would prevent the migration of dislocations and improved the mechanical properties of the binding agent. When the mass ratio of Cu was 4.5%, the comprehensive mechanical properties of binding agent was optimal. The bending strength and hardness were 334 MPa and 98HRB, and the relative density was 98.94%. Meanwhile, diamond was well wrapped by Al-based binding agent. The loss ratio of diamond tool specimen reached the lowest point of 12.8%, the grinding ratio was improved by 9.7%, and the surface roughness of the machined workpiece was 0.092 μm.
徐俊杰, 万隆, 宋冬冬, 王俊沙, 李颖颖, 刘莹莹. Cu含量对铝基结合剂及其金刚石工具性能的影响*[J]. 《材料导报》期刊社, 2017, 31(8): 104-108.
XU Junjie, WAN Long, SONG Dongdong, WANG Junsha, LI Yingying, LIU Yingying. Influence of Cu Content on the Properties of the Al-based Binding Agent and Diamond Tool. Materials Reports, 2017, 31(8): 104-108.
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2017, Vol. 31 
