| METALS AND METAL MATRIX COMPOSITES |
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| Effect of CuTi on the Microstructure and Wear Resistance of Diamond/AlSi Composite Braze Coating on Ti-6Al-4V Alloy |
| ZHANG Lei1,2,3,*, LONG Weimin1, FAN Zhibin3, DU Dong2, LIU Dashuang4, SUN Zhipeng5, LI Yujia5, SHANG Yong6
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1 State Key Laboratory of Advanced Brazing Filler Metals and Technology, Zhengzhou Research Institute of Mechanical Engineering Co., Ltd. of China National Machinery Institute Group, Zhengzhou 450001, China
2 Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China
3 Ningbo Intelligent Machine Tool Research Institute Co. Ltd. of China National Machinery Institute Group, Ningbo 315709, Zhejiang, China
4 School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China
5 Ningbo Songlan Cutting Tools Technology Co. Ltd., Ningbo 315709, Zhejiang, China
6 Tunneling Equipment Manufacture of China Railway Tunnel Group Co. Ltd., Xinxiang 453000,Henan, China |
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Abstract Braze coating provides a new technological solution for improving the surface wear resistance of components. The method of brazing diamond particles on the surface of Ti-6Al-4V titanium alloy using AlSi brazing material is difficult to achieve firm connection. This experiment prepared AlSi composite brazing material by adding CuTi alloy powder to AlSi brazing material, and prepared diamond composite brazing coating on the surface of Ti-6Al-4V alloy by using induction brazing. The results show that, the CuTi particles dissolved in AlSi alloy increased the viscosity of the brazing material at brazing temperature and changed the distribution of diamond particles in the brazing coating. The composite brazing coating matrix was mainly composed of α-Al, eutectic silicon, Ti(Al1-xSix)3 and CuAl2. With the increase of CuTi alloy in the brazing coating, the morphology of Ti(Al1-xSix)3 changed from lamellar to cellular structure. When the CuTi was 10wt%, diamond composite brazing coating exhibited best wear resistance,because the increase of Ti content improved the bonding strength between brazing filler metal and diamond particles, and at the same time, CuAl2 and TiAl3 hard particles generated by in-situ reaction were uniformly distributed in the brazing coating, which effectively improved the microhardness of AlSi alloy matrix.
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Published: 10 November 2024
Online: 2024-11-11
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| Fund:Leading Talents of Zhongyuan Technology Innovation(234200510015), the National Key Research and Development Program of China (2021YFB3401100). |
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2024, Vol. 38 
