操慧珺,张祺雨,张天刚,甄灏,张志强.Y2O3含量对TC4表面WC增强钛基激光熔覆层组织与摩擦学性能的影响[J].表面技术,2024,53(19):126-140.
CAO Huijun,ZHANG Qiyu,ZHANG Tiangang,ZHEN Hao,ZHANG Zhiqiang.Effects of Y2O3 Content on Microstructure and Tribological Properties of WC-reinforced Ti-based Coatings on TC4 Surfaces[J].Surface Technology,2024,53(19):126-140 |
| Y2O3含量对TC4表面WC增强钛基激光熔覆层组织与摩擦学性能的影响 |
| Effects of Y2O3 Content on Microstructure and Tribological Properties of WC-reinforced Ti-based Coatings on TC4 Surfaces |
| 投稿时间：2024-06-02 修订日期：2024-08-23 |
| DOI：10.16490/j.cnki.issn.1001-3660.2024.19.012 |
| 中文关键词: 激光熔覆 TC4 Y2O3 微观组织 细化机理 摩擦学性能 |
| 英文关键词:laser cladding TC4 Y2O3 microstructure refining mechanism tribological property |
| 基金项目:国家自然科学基金(U2033211);厦门市青年创新基金(3502Z20206026);厦门城市职业学院校级科研项目(KYKJ2019-4) |
| 作者 | 单位 |
| 操慧珺 | 厦门城市职业学院 交通工程学院 人工智能应用技术研究中心，福建 厦门 361008 |
| 张祺雨 | 中国民航大学 航空工程学院，天津 300300 |
| 张天刚 | 中国民航大学 航空工程学院，天津 300300 |
| 甄灏 | 中国民航大学 航空工程学院，天津 300300 |
| 张志强 | 中国民航大学 航空工程学院，天津 300300 |
|
| Author | Institution |
| CAO Huijun | Traffic Engineering Institute,Artificial Intelligence Application Technology Research Center, Xiamen City University, Fujian Xiamen 361008, China |
| ZHANG Qiyu | School of Aeronautical Engineering, Civil Aviation University of China, Tianjin 300300, China |
| ZHANG Tiangang | School of Aeronautical Engineering, Civil Aviation University of China, Tianjin 300300, China |
| ZHEN Hao | School of Aeronautical Engineering, Civil Aviation University of China, Tianjin 300300, China |
| ZHANG Zhiqiang | School of Aeronautical Engineering, Civil Aviation University of China, Tianjin 300300, China |
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| 中文摘要: |
| 目的 增加航空TC4合金的安全服役寿命。方法 采用同轴送粉激光熔覆技术在其表面制备了TC4+Ni-MoS2+WC+xY2O3(x=0%、1%、2%、3%、4%，质量分数)耐磨复合涂层，利用着色渗透探伤、XRD、SEM、EDS、EBSD和TEM等多种检测手段和设备，分析了Y2O3添加对涂层组织与摩擦学性能的影响规律。结果 3%Y2O3涂层的成形质量最优，所有涂层生成相相同，主要由TiC、Ti2Ni、Ti2S、基体β-Ti以及未熔WC组成。Y2O3与TiC、Ti2S、Ti2Ni之间形成了共格依附生长关系，所有涂层中均有效合成了TiC-Ti2S、TiC-Ti2Ni和Ti2S-Ti2Ni共格复合结构相。随着Y2O3含量增大，基体显露面积增加，其余物相逐步细化、团聚并沿晶界连续生长。所有涂层的显微硬度均高于TC4基材，大小与Y2O3含量呈负相关变化。所有涂层的摩擦因数均高于基材，磨损率均低于基材，摩擦因数和磨损率随着Y2O3含量增加，出现了先降低后升高的变化规律，其中3% Y2O3涂层的摩擦因数最低(μ=0.481 3)，耐磨性(3.55×104 mm3/(N.m))和磨损面质量(Ra=21.24 μm)最优。结论 适量Y2O3有助于改善涂层的成形质量，Y2O3添加并未影响涂层物相种类，且可作为异质形核基底细化相互依附生长的TiC-Ti2S-Ti2Ni共格结构相，除基体相外，Y2O3易吸引其余物相在涂层晶界处钉扎;Y2O3含量增加不能增大涂层显微硬度，所有涂层均不具备减摩性能，但耐磨性均优于TC4基材，适量Y2O3添加可使涂层综合摩擦学性能达到最优。 |
| 英文摘要: |
| To enhance the surface mechanical properties and extend the safe service life of aerospace TC4 alloy, a composite coating of TC4, Ni-MoS2, WC, and Y2O3 powders was prepared on the surface of TC4 alloy using laser cladding, which improved the microhardness and wear resistance of the substrate surface. This study investigated the effect of Y2O3 content on the microstructure, hardness, and tribological properties of the coating. Using a Laser TruDisk4002 laser under argon protection, wear-resistant composite coatings of TC4+Ni-MoS2+WC+xY2O3 (x = 0wt.%, 1wt.%, 2wt.%, 3wt.%, 4wt.%) were prepared on a TC4 alloy substrate. The coating was observed with a scanning electron microscope (SEM). Phase identification was conducted by X-ray diffraction (XRD), energy dispersive spectroscopy (EDS), electron backscatter diffraction (EBSD), and transmission electron microscopy (TEM). The microhardness distribution of the coating was studied with a Vickers microhardness tester. The friction and wear properties of the coating were tested with a dry friction tester, and the wear morphology was analyzed with a non-contact white light interferometer profilometer. Additionally, the coherent relationships between the phases in the coating were calculated according to the Bramfitt’s two-dimensional lattice misfit theory. Results showed that the 3wt.% Y2O3 coating exhibited the best forming quality. As the Y2O3 content increased, the coating thickness increased from 0.975 mm to 1.447 mm. The cladding layer mainly consisted of TiC, Ti2Ni, Ti2S, matrix β-Ti, and unmolten WC. The addition of Y2O3 did not change the types of phases formed in the coating. According to the Bramfitt |
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