Materials Reports  2020, Vol. 34 Issue (Z2): 457-461 |
| METALS AND METAL MATRIX COMPOSITES |
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| Microstructure and Wear Properties of Diamond/NiCrBSi Composite Brazing Coating |
| QIN Jian1,2, LONG Weimin1, LU Quanbin1, LI Shengnan1, HUANG Junlan1
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1 State Key Laboratory of Advanced Brazing Filler Metals & Technology, Zhengzhou Research Institute of Mechanical Engineering Co., LTD, Zhengzhou 450001, China
2 School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100000, China |
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Abstract Diamond/NiCrBSi composite coatinglayer was made on the surface of 65Mn steel by vacuum brazing, the phase composition and wear resistance properties of the joint were tested, the results showed that: the diamond/NiCrBSi composite layer formed well, the width of the reacted interface between the composite and base metal is approximately 20 μm, which means well metallurgical combination. The diamond is dispersed in the coating layer, and reacted with the filler alloy resulted in the formation of Cr/C compound with hardness of 1150HV. Ni solid solution phase, Cr/B phase and eutectic phase composed of Ni3Si and Ni3B were also found in the composite coating. The microhardness of all the phase is higher than that of 65Mn base metal. Under the same wear test conditions, the weight loss of 65Mn steel reached 1.350 9 g while the diamond/NiCrBSi composite coating was 0.221 4 g, only 1/6 of loss weight of 65Mn base metal.
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Published: 08 January 2021
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| About author:: Jian Qin, male, 1990, master, engineer, mainly engaged in the research and development of welding metallurgy and welding materials, new welding technology and other fields, has published more than 30 papers. Weimin Long, doctoral supervisor, science and technology innovation leading talent of “ten Thousand People Plan”, Scholar of Central Plains, expert enjoying government special allowance, outstanding talent of Science and technology innovation of Henan Province, Mainly engaged in the research of brazing materials, brazing technology and equipment. |
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