TC4钛合金表面冷喷涂制备CuNiIn涂层组织及其微动磨损性能研究

李海升, 刘坤, 李文亚, 吴东, 颜华

doi:10.16577/j.issn.1001-1560.2022.0002

材料保护 >

2022 , Vol. 55 >Issue 1: 22 - 26

DOI: https://doi.org/10.16577/j.issn.1001-1560.2022.0002

冷喷涂专栏

TC4钛合金表面冷喷涂制备CuNiIn涂层组织及其微动磨损性能研究

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1. 成都飞机工业(集团)有限责任公司；2. 西北工业大学 a.凝固技术国家重点实验室, b.陕西省摩擦焊接工程技术重点实验室

李文亚(1976-)，博士，教授，主要研究方向为冷喷涂与摩擦焊，电话：029-88495226，E - mail: liwy@nwpu.edu.cn

收稿日期: 2021-07-23

修回日期: 2021-08-18

录用日期: 2021-09-16

网络出版日期: 2023-12-15

基金资助

企事业单位委托科技项目(D5203210402)；凝固技术国家重点实验室(西北工业大学)自主研究课题(2021-TZ-01)资助

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Microstructure and Fretting Wear Properties of CuNiIn Coating Prepared by Cold Spraying on Surface of TC4 Titanium Alloy

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1. Chengdu Aircraft Industry (Group) Co., Ltd., Chengdu 610092, China;2a. State Key Laboratory of Solidification Processing, 2b. Shaanxi Key Laboratory of Friction Welding Technologies, Northwestern Polytechnical University, Xi’an 710072, China

Received date: 2021-07-23

Revised date: 2021-08-18

Accepted date: 2021-09-16

Online published: 2023-12-15

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摘要

为推动冷喷涂技术在航空防护涂层领域的应用，采用氮气冷喷涂技术在TC4钛合金表面制备了CuNiIn涂层，使用光学显微镜、扫描电镜、显微硬度计和微动磨损试验机对涂层宏/微观组织、显微硬度及微动磨损性能进行了分析。结果表明：越靠近基体，涂层致密性越好，整体涂层孔隙率约为2.8%，涂层微观组织较粉末原始组织有一定细化；涂层硬度值自基体向表面沿厚度方向有增大的趋势，靠近基体一侧硬度平均值为274 HV2 N，靠近表面的涂层硬度稳定在300 HV2 N左右；微动位移较小时，涂层失效机制主要是黏着磨损，磨损形貌为椭圆形，微动位移较大时，以磨粒磨损为主，磨损形貌接近圆形。

关键词： 冷喷涂; CuNiIn; 涂层; 微观组织; 显微硬度; 微动磨损

本文引用格式

李海升, 刘坤, 李文亚, 吴东, 颜华 . TC4钛合金表面冷喷涂制备CuNiIn涂层组织及其微动磨损性能研究[J]. 材料保护, 2022 , 55(1) : 22 -26 . DOI: 10.16577/j.issn.1001-1560.2022.0002

Abstract

In order to promote the application of cold spray technology in the field of aviation protective coatings, this work prepared CuNiIn coating on surface of TC4 titanium alloy via cold spray with nitrogen technology. The macrostructure and microstructure, microhardness and fretting wear properties of the coating were analyzed by optical microscope, scanning electron microscope, microhardness tester and fretting wear tester respectively. Results showed that the overall porosity of the coating was about 2.8%, and the closer to the substrate, the denser the coating. The microstructure of the coating was finer than that of the original powder. Moreover, the hardness value of the coating increased from the substrate to the surface along the thickness direction, which changed from 274 HV2 N of average hardness near the substrate to stable value of 300 HV2 N near the surface of the coating. When the fretting displacement was small, the coating failure mechanism was mainly adhesive wear, and the wear morphology was oval. When the fretting displacement was large, it was mainly abrasive wear, and the wear morphology was close to circular.

Key words： cold spray; CuNiIn; coating; microstructure; microhardness; fretting wear

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