预合金结合剂成分及烧结工艺对金刚石工具性能的影响

doi:10.11896/cldb.18050079

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Abstract In this paper, Fe₄₀Cu₄₀Co₂₀ pre-alloyed powders, Cu₈₀Sn₂₀ pre-alloyed powders and WC powders were used as raw materials. The matrix samples of diamond tools were prepared by vacuum pressureless sintering process. Scanning electron microscope, Rockwell hardness tester and Archimedes Drainage Act were used to check the microscope, hardness and relative density of samples. And the effects of different content of pre-alloyed powders on the micro-morphology, hardness and relative density of the carcass were studied. The results showed that when the content of Fe₄₀Cu₄₀Co₂₀ pre-alloyed powder, Cu₈₀Sn₂₀ pre-alloyed powder and WC powder was 50%, 40% and 10% respectively, the overall performance of the matrix was the best. The density and hardness could reach 94.6% and 105HRB, respectively. On the basis of the best formula, the effects of different cold pressure and holding time on the mechanical properties of the matrix were studied. It was found that the matrix possessed superiority comprehensive mechanical properties when the cold pressing pressure was 45 MPa and the sintering holding time was 30 min. This work can provide preliminary experimental for the establishment of the pressureless sintering process for diamond tools.

Key words： pre-alloyed powder vacuum pressureless sintering sintering process diamond tools mechanical properties

Published: 19 June 2019

CLC number:

TB34

Fund:This research was funded by National Natural Science Foundation of China (51864028,51604134),the Applied Basic Research Fund Project of Yunnan Provi-nce (2018FD053,2018FA029),Science Research Foundation of Yunnan Provincial Education Department (2018JS306),International S & T Cooperation Program of China (2015DFR50620).

About author:: Ming Houreceived his B.E. degree in June 2016 from Liaoning Institute of Science and Technology in Engineering. Now he is a M.S. and Ph.D. continunos reading student. And he is focusing on the the research of preparation of superhard materials.Li Yangreceived his Ph.D. degree in November 2013 from Huazhong University of Science and Technology in engineering. He is currently an associate professor in Kunming University of Science and Technology and participates in the development of diamond tools preparation equipment and technology. He has published more than 20 papers. His research interests are preparation of superhard materials tools, functionalization of carbon materials and exploitation of the nanomaterials and devices.

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	HOU Ming
	GUO Shenghui
	GAO Jiyun
	YANG Li
	WANG Liang
	YE Xiaolei

Cite this article:

HOU Ming,GUO Shenghui,GAO Jiyun, et al. Effect of Pre-alloyed Powder with Different Composition and Sintering Process on Performance of Diamond Tools[J]. Materials Reports, 2019, 33(14): 2403-2407.

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http://www.mater-rep.com/EN/10.11896/cldb.18050079 OR http://www.mater-rep.com/EN/Y2019/V33/I14/2403

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