不同位移幅值对钴基涂层高温微动磨损性能的影响

曹晓英, 张强

doi:10.16577/j.issn.1001-1560.2022.0344

材料保护 >

2022 , Vol. 55 >Issue 12: 91 - 92

DOI: https://doi.org/10.16577/j.issn.1001-1560.2022.0344

试验研究

不同位移幅值对钴基涂层高温微动磨损性能的影响

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东方汽轮机有限公司

曹晓英(1983-)，硕士，高级工程师，主要从事热喷涂技术研究，电话:13981085172，E-mail:caoxiaoying＠ dongfang.com

收稿日期: 2022-06-21

修回日期: 2022-07-13

录用日期: 2022-08-31

网络出版日期: 2023-12-27

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Influence of Different Displacement Amplitudes on High Temperature Fretting Wear Properties of Cobalt-Based Coatings

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(Dongfang Turbine Co.， Ltd.， Deyang 618000， China)

Received date: 2022-06-21

Revised date: 2022-07-13

Accepted date: 2022-08-31

Online published: 2023-12-27

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摘要

为对比不同位移幅值对钴基涂层高温微动磨损性能影响，采用氧气助燃超音速火焰喷涂工艺制备CoMoCrSi系涂层，在自制高温微动磨损试验机上进行不同位移幅值涂层高温微动磨损性能试验，采用白光干涉扫描仪测量磨损体积，并计算磨损率；采用扫描电镜及能谱仪观察磨痕表面形貌及分析元素成分，并对磨痕表面进行了物相分析。结果表明:当位移幅值为30 μm 和60 μm 时，摩擦系数呈波动上升趋势，最终摩擦系数稳定于0.35和0.55左右。随位移幅值增加，磨损率与磨损体积呈正比关系；磨损机制从轻微塑变向磨粒磨损及黏着磨损混合机制、磨粒磨损伴黏着磨损机制发展；微动磨损区域涂层主要由Co7Mo6、Co3Mo 及Co3Mo2Si 相组成。

关键词： 位移幅值; 微动磨损; 透平部件; CoMoCrSi

本文引用格式

曹晓英, 张强 . 不同位移幅值对钴基涂层高温微动磨损性能的影响[J]. 材料保护, 2022 , 55(12) : 91 -92 . DOI: 10.16577/j.issn.1001-1560.2022.0344

Abstract

In order to compare the effects of different displacement amplitudes on the fretting wear properties of cobalt-based coatings at high temperature， the CoMoCrSi coating was prepared by the oxygen-assisted supersonic flame spraying process. The high-temperature fretting wear performance test of the coating under different displacement amplitudes was carried out on the self-made high-temperature fretting wear tester.The white light interference scanner was used to measure the wear volume and the wear rate was correspondingly calculated， the scanning electron microscope and energy dispersive spectrometer were used to observe the surface morphology of the wear scar and analyze the element composition， and the surface phases of the wear scar were also analyzed. Results showed that when the displacement amplitudes were 30 μm and 60 μm， the friction coefficient showed a fluctuating upward trend， and the final friction coefficient stabilized at about 0.35 and 0.55. As the displacement amplitude increased， the wear rate was proportional to the wear volume； the wear mechanism was changed from slight plastic change to the mixed mechanism of abrasive wear and adhesive wear， and to the mechanism of abrasive wear accompanying with adhesive wear. The coating in the fretting wear zone was mainly composed of Co7Mo6， Co3Mo and Co3Mo2Si phases.

Key words： displacement amplitude; fretting wear; turbine component; CoMoCrSi

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