空气超音速火焰喷涂、冷喷涂与电镀制备电触头银层的组织结构与摩擦磨损性能对比

何学敏, 王欣, 史皓峻, 杨海亮, 王贵山, 秦加浩, 所新坤

doi:10.16577/j.issn.1001-1560.2022.0031

材料保护 >

2022 , Vol. 55 >Issue 2: 9 - 14

DOI: https://doi.org/10.16577/j.issn.1001-1560.2022.0031

试验研究

空气超音速火焰喷涂、冷喷涂与电镀制备电触头银层的组织结构与摩擦磨损性能对比

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1. 中国南方电网有限责任公司超高压输电公司柳州局； 2.宁波市江北九方和荣电气有限公司； 3. 宁波大学机械工程与力学学院

秦加浩，硕士研究生，主要从事热喷涂耐磨涂层、冷喷涂陶瓷金属化等研究，E-mail：b9527119911@163.com

收稿日期: 2021-08-30

修回日期: 2021-09-30

录用日期: 2021-10-27

网络出版日期: 2023-12-25

基金资助

国家自然科学基金项目(21705158)资助

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Comparison of Microstructures and Wear Properties of Silver Coatings for Electrical Contact Prepared by Air Supersonic Flame Spraying, Cold Spraying and Electroplating

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1.Liuzhou Bureau of EHV Power Transmission Company，China South Power Grid Co., Ltd., Liuzhou 545006, China;2.Ningbo Jiangbei Gofront Herong Electric Co., Ltd., Ningbo 315033, China;3.School of Mechanical, Engineering and Mechanics, Ningbo University, Ningbo 315211, China

Received date: 2021-08-30

Revised date: 2021-09-30

Accepted date: 2021-10-27

Online published: 2023-12-25

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摘要

电触头是电力输送系统中的关键元器件，其失效方式与触头表面涂层的磨损密切相关。采用空气超音速火焰喷涂工艺(HVAF)和冷喷涂工艺(CS)分别制备了银涂层;采用往复摩擦试验研究了涂层在不同载荷、频率条件下的摩擦磨损性能，并与电镀银镀层的性能进行了对比；采用扫描电镜(SEM)和X射线能谱仪(EDS)研究了涂层磨痕的表面形貌和成分，并对涂层的摩擦磨损机理进行了分析和讨论。结果表明：空气超音速火焰喷涂和冷喷涂工艺均可制备较厚的致密银涂层；冷喷涂制备的银涂层硬度较高，在高频、高载荷条件下具有较小的摩擦系数和较低的磨损量；空气超音速火焰喷涂和冷喷涂制备的银涂层的磨损机制主要为疲劳磨损。

关键词： 电触头; 银涂层; 空气超音速火焰喷涂; 冷喷涂; 电镀; 摩擦磨损

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何学敏, 王欣, 史皓峻, 杨海亮, 王贵山, 秦加浩, 所新坤 . 空气超音速火焰喷涂、冷喷涂与电镀制备电触头银层的组织结构与摩擦磨损性能对比[J]. 材料保护, 2022 , 55(2) : 9 -14 . DOI: 10.16577/j.issn.1001-1560.2022.0031

Abstract

The electrical contact is a pivotal component in the power transmission system, whose failure mode is closely related to the wear property of the coating on it.In this work, the silver coating was prepared by air supersonic flame spraying and cold spraying(CS).Subsequently, the reciprocating friction test was used to study the friction and wear properties of the coatings under different loads and frequencies, and the results were compared with the property of coatings fabricated by using electroplating.The scanning electron microscope(SEM)and X-ray energy spectrometer(EDS)were used to investigate the morphology and composition of the worn surface, and the friction and wear mechanisms of the coatings were analyzed and discussed.Results showed that both air supersonic flame spraying and CS processes could prepare thicker and denser silver coatings.The silver coatings prepared by cold spraying presented higher microhardness, smaller friction coefficient and lower wear loss under the high frequency and high load conditions.Besides, the wear mechanism of silver coating prepared by air supersonic flame spraying and CS was mainly fatigue wear.

Key words： electrical contact; silver coating; air supersonic flame spraying; cold spray; electroplating; friction and wear

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