| XIANG Yong-hua,CHEN Zhuo,ZHAO Yao,XU Fu-jia,CUI Xiu-fang,JIN Guo,XU Bin-shi.Tribological Behaviour of Titanium Modified Copper-based Coating by Laser Cladding in Brine[J],49(8):138-144 |
| Tribological Behaviour of Titanium Modified Copper-based Coating by Laser Cladding in Brine |
| Received:January 21, 2020 Revised:August 20, 2020 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2020.08.015 |
| KeyWord:brine environment surface modification second phase reinforcement laser cladding titanium copper based coating tribology behavior |
| Author | Institution |
| XIANG Yong-hua |
1.Unit 92228, PLA, Beijing , China |
| CHEN Zhuo |
2.Harbin Engineering University, Harbin , China |
| ZHAO Yao |
2.Harbin Engineering University, Harbin , China |
| XU Fu-jia |
3.Harbin Welding Institute Limited Company, Harbin , China |
| CUI Xiu-fang |
2.Harbin Engineering University, Harbin , China |
| JIN Guo |
2.Harbin Engineering University, Harbin , China |
| XU Bin-shi |
4.Key Laboratory of National Defense Science and Technology of Equipment Remanufacturing Technology, Academy of Army Armored Forces, Beijing , China |
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| Abstract: |
| The paper aims to generate a wearable second phase structure by titanium element and copper base alloy to improve the friction performance of copper-based alloy in brine. A titanium modified copper-based coating was fabricated on ZQAl9442 copper alloy via laser cladding. SEM, EDS, XRD and friction and wear tester were used to analyze the microstructure, element distribution, hardness and friction performance of the modified coating. The AlCu2Ti phase was generated due to the addition of titanium element in the modified coating, which improved the surface hardness of the modified coating under the action of the second phase precipitation strengthening. The microhardness of the modified coating was up to (310±10)HV0.3, 14.8% higher than that of the homogeneous repair layer. The friction coefficient of the modified coating in brine was much lower than that of the NAB coating. The wear mechanism of modified coating in atmospheric environment was oxidation wear, adhesive wear and abrasive wear, while the wear mechanism in seawater environment was abrasive wear. Through laser cladding on the surface of ZQAl9442 copper alloy, the titanium-modified copper-base modified coating with high hardness, high wear resistance and resistance to marine environment friction was obtained, which can improve the service life of copper alloy in marine environment to some extent. |
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