Cu含量对铝基结合剂及其金刚石工具性能的影响<sup>*</sup>

doi:10.11896/j.issn.1005-023X.2017.08.021

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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.

Key words： Al-based binding agent microstructure mechanical properties grinding performance

Published: 02 May 2018

CLC number:

TG74

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	Articles by authors
	XU Junjie
	WAN Long
	SONG Dongdong
	WANG Junsha
	LI Yingying
	LIU Yingying

Cite this article:

XU Junjie,WAN Long,SONG Dongdong, et al. Influence of Cu Content on the Properties of the Al-based Binding Agent and Diamond Tool[J]. Materials Reports, 2017, 31(8): 104-108.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2017.08.021 OR http://www.mater-rep.com/EN/Y2017/V31/I8/104

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