Effect of Pre-alloyed Powder with Different Composition and Sintering Process on Performance of Diamond Tools
HOU Ming1,2, GUO Shenghui1,2,3,4, GAO Jiyun5, YANG Li1,2,4, WANG Liang1,2, YE Xiaolei1,2
1 State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093; 2 Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093; 3 State International Joint Research Center of Advanced Technology for Superhard Materials, Kunming University of Science and Technology, Kunming 650093; 4 National Local Joint Laboratory of Engineering Application of Microwave Energy and Equipment Technology, Kunming University of Science and Technology,Kunming 650093; 5 Faculty of Chemistry and Environment, Yunnan Minzu University, Kunming 650500
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.
侯明, 郭胜惠, 高冀芸, 杨黎, 王梁, 叶小磊. 预合金结合剂成分及烧结工艺对金刚石工具性能的影响[J]. 材料导报, 2019, 33(14): 2403-2407.
HOU Ming, GUO Shenghui, GAO Jiyun, YANG Li, WANG Liang, YE Xiaolei. Effect of Pre-alloyed Powder with Different Composition and Sintering Process on Performance of Diamond Tools. Materials Reports, 2019, 33(14): 2403-2407.
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2019, Vol. 33 
