铝合金表面Ni基复合涂层制备机理及摩擦性能

兰州理工大学学报 ›› 2023, Vol. 49 ›› Issue (3): 15-22.

铝合金表面Ni基复合涂层制备机理及摩擦性能

闫成旗^*1,*, 贾竹英², 李占君¹

1.安阳工学院机械工程学院, 河南安阳 455000;
2.安阳工学院工程训练中心, 河南安阳 455000

收稿日期:2022-06-08 出版日期:2023-06-28 发布日期:2023-07-07
通讯作者: 闫成旗(1988-),男,河南安阳人,博士,讲师. Email:yanchengqi46@163.com
基金资助:
河南省自然科学基金(232300420325),河南省高等学校重点科研项目(22A430011)

Preparation mechanism and tribological performance of Ni-base composite coating on aluminum alloy surface

YAN Cheng-qi¹, JIA Zhu-ying², LI Zhan-jun¹

1. School of Mechanical Engineering, Anyang Institute of Technology, Anyang 455000, China;
2. Engineering training center, Anyang Institute of Technology, Anyang 455000, China

Received:2022-06-08 Online:2023-06-28 Published:2023-07-07

摘要/Abstract

摘要： 为提高铝合金在航空航天应用中的表面抗磨性能,采用机械球磨方法在其表面制备了Ni-Al和3种不同W含量的Ni-Al-W复合涂层.研究表明:四种复合涂层组织均匀分布,厚度约为50~100 μm.随着W含量的增加颗粒的韧性变形面逐渐减少.经过热处理后,Ni-Al复合涂层中有Al₃Ni和Al₃Ni₂金属间化合物生成,但其剩余粉末中仅有Al₃Ni₂生成,并且无细粉剩余.3种Ni-Al-W复合涂层和粗粉中有AlNi和Al₃Ni₂生成,细粉中Al₃Ni₂金属间化合物随W含量的增加逐渐消失.复合涂层显微硬度随W含量的增加有所增加,含W涂层摩擦系数略高于铝合金基体和Ni-Al复合涂层,处于0.6~0.75,但其磨损率远低于基体铝合金和Ni-Al复合涂层,约为0.2×10^-3~0.4×10^-3mm³/(N·m),并且随W含量的增加略有降低.铝合金表面Ni-Al-W复合涂层的制备有效提升了铝合金表面的抗磨性能.

关键词: 铝合金, 复合粉末, 机械球磨, 金属间化合物, 抗磨性能

Abstract: To improve the surface wear resistance of aluminum alloy in the application, Ni-Al and three different Ni-Al-W composite coatings were prepared on the surface of aluminum alloy by mechanical milling method. The study showed that the inner tissues of the four composite coatings are evenly distributed with a thickness of about 50 μm to 100 μm. With the increase of W content, the ductile deformation surface of the particle gradually decreases. After heat treatment, Al₃Ni and Al₃Ni₂ intermetallic compounds are generated in the Ni-Al compound coating, but only Al₃Ni₂ is produced in the remaining powder, and no fine powder remain. AlNi and Al₃Ni₂ are generated in the three Ni-Al-W composite coatings and coarse powder, and the Al₃Ni₂ intermetallic compounds in the fine powder gradually disappear with increasing W content. The microhardness of the composite coating increase with increasing W content, the friction coefficient of the three coatings is slightly higher than that of the aluminum alloy matrix and Ni-Al composite coating, between 0.6 and 0.75, however, its wear rate is much lower than that of matrix aluminum alloy and Ni-Al composite coating, about 0.2×10^-3~0.4×10^-3 mm³/(N·m), and slightly reduce with the increase of W content. The preparation of Ni-Al-W composite coating on aluminum alloy surface effectively improves the wear resistance of aluminum alloy surface.

Key words: aluminum alloy, composite powder, mechanical ball mill, intermetallic compound, wear resistance

中图分类号:

TG495

闫成旗, 贾竹英, 李占君. 铝合金表面Ni基复合涂层制备机理及摩擦性能[J]. 兰州理工大学学报, 2023, 49(3): 15-22.

YAN Cheng-qi, JIA Zhu-ying, LI Zhan-jun. Preparation mechanism and tribological performance of Ni-base composite coating on aluminum alloy surface[J]. Journal of Lanzhou University of Technology, 2023, 49(3): 15-22.

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