| DENG Wen,HAO En-kang,AN Yu-long,LIU Guang,TANG Lin.Preparation and Tribological Properties of NiCoCrAlYTa/WC-Co Composite Coating[J],51(4):104-111 |
| Preparation and Tribological Properties of NiCoCrAlYTa/WC-Co Composite Coating |
| Received:July 08, 2021 Revised:August 30, 2021 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2022.04.009 |
| KeyWord:NiCoCrAlYTa/WC-Co composite coating HVOF mechanical properties friction and wear properties |
| Author | Institution |
| DENG Wen |
School of Mechatronics Engineering, Xi'an Technological University, Xi'an , China |
| HAO En-kang |
Ningbo Branch of Chinese Academy of Ordnance Science, zhejiang Ningbo , China |
| AN Yu-long |
State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou , China |
| LIU Guang |
Ningbo Branch of Chinese Academy of Ordnance Science, zhejiang Ningbo , China |
| TANG Lin |
School of Mechatronics Engineering, Xi'an Technological University, Xi'an , China |
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| Abstract: |
| The work aims to introduce different proportions of hard phase WC-Co powder (mass fraction:25%, 50% and 75%) to NiCoCrAlYTa powder and mix and oscillate these two kinds of powder mechanically and evenly to prepare the NiCoCrAlYTa/WC-Co composite coating by HVOF-sprayed technology, so as to improve the wear resistance of MCrAlY coating. The microstructure, phase composition and element distribution of the composite coating were analyzed by SEM, XRD and EDS. The mechanical properties and the tribological properties as well as the wear mechanism of the composite coating were also studied. The NiCoCrAlYTa/WC-Co composite coating deposited by HVOF was compact and the distribution of elements and phases was uniform. The addition of WC-Co enhanced the microhardness of the coating and improved the friction and wear properties. With the increase of the WC-Co, the friction coefficient of the composite coating increased, but the wear rate decreased. When the content of WC-Co reached 75%, the friction coefficient of the composite coating was the highest (about 0.84), while the wear rate was the lowest, about 9.28×10–6 mm3/(N.m). The introduction of WC-Co into the metal-based coating can effectively improve the hardness of the coating and increase the wear resistance, which also provides a theoretical basis for the application of excellent tribological properties of the metal-based coating. |
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