闸门底枢摩擦副QT600-3/40Cr摩擦学性能及磨损表面功率谱密度表征

doi:10.3901/JME.2019.17.102

机械工程学报 ›› 2019, Vol. 55 ›› Issue (17): 102-109.doi: 10.3901/JME.2019.17.102

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闸门底枢摩擦副QT600-3/40Cr摩擦学性能及磨损表面功率谱密度表征

秦红玲^1,2, 郭文涛¹, 李雪飞¹, 赵新泽¹, 徐翔¹

1. 三峡大学水电机械设备设计与维护湖北省重点实验室宜昌 443000;
2. 河南科技大学高端轴承摩擦学技术与应用国家地方联合工程实验室洛阳 471000

收稿日期:2018-11-09 修回日期:2019-03-19 出版日期:2019-09-05 发布日期:2020-01-07
通讯作者: 徐翔(通信作者),男,1981年出生,博士,副教授。主要研究方向为摩擦学及表面工程。E-mail:xu_xiang@ctgu.edu.cn
作者简介:秦红玲,女,1978年出生,博士,副教授。主要研究方向为摩擦学及表面工程。
基金资助:
国家自然科学基金（51405265）、湖北省技术创新专项重大（2016AAA076）、高端轴承摩擦学技术与应用国家地方联合工程实验室开放基金（201811）、湖北省教育厅科学技术研究计划重点（D20181206）和水电机械设备设计与维护湖北省重点实验室开放基金（2017KJX01）资助项目。

Tribological Performance of Gate Bottom Pivot Friction Pair QT600-3/40Cr and Its Wear Surface Power Spectral Density Characterization

QIN Hongling^1,2, GUO Wentao¹, LI Xuefei¹, ZHAO Xinze¹, XU Xiang¹

1. Hubei Key Laboratory of Hydroelectric Machinery Design & Maintenance, Yichang 443000;
2. National United Engineering Laboratory for Advanced Bearing Tribology, Henan University of Science and Technology, Luoyang 471000

Received:2018-11-09 Revised:2019-03-19 Online:2019-09-05 Published:2020-01-07

摘要/Abstract

摘要： 为了研究低速重载下接触应力对QT600-3/40Cr摩擦学性能的影响，以及表面功率谱密度与磨损机理、磨损速率间的对应关系，在MMW-1A立式万能摩擦磨损试验机上，采用销/盘配副面接触摩擦的形式，对闸门底枢摩擦副QT600-3/40Cr在脂润滑条件下进行磨损试验研究，获得不同接触应力作用下的摩擦学性能。通过扫描电镜（SEM）对QT600-3/40Cr的磨损机理进行探讨，并结合一维表面功率谱密度（PSD_ID）和二维表面功率谱密度（PSD_IID）对销试样磨损表面进行表征。结果表明，当接触应力从10.6 MPa依次增加至15.9 MPa、19.1 MPa、21.1 MPa时，磨损率依次增加11%、109%、592%，且磨损表面出现的犁沟现象逐渐严重，磨损形式皆为磨粒磨损。与此同时，PSD_ID和PSD_IID值也随之增加，最大PSD_ID值依次增加22%、94%和598%，与磨损率的变化呈现相同趋势。PSD_ID主要集中在0~0.0075 μm^-1的空间频率范围内，PSD_IID图存在明显的趋向性峰值分布，表明销试样磨损表面具有明显的主导空间频率，即磨损表面形貌具有一定的相似性，磨损机理尚未发生变化。可见，PSD对磨损机理与趋势的预测结果与SEM检测结果一致，可用于辅助分析QT600-3/40Cr摩擦副磨损机理与趋势。

关键词: 闸门底枢, QT600-3/40Cr, 摩擦学性能, 磨损机理, 功率谱密度

Abstract: In order to study the effect of contact stresses on gate bottom pivot friction pair QT600-3/40Cr under low-velocity heavy load condition, and the correlation among surface power spectral density, abrasion mechanism and velocity. The wear tests of the friction pair QT600-3/40Cr are carried out under the condition of grease lubrication with pin-disk contact under different contact stresses by means of the MMW-1A tester. The wear mechanism of QT600-3/40Cr is analyzed by scanning electron microscopy (SEM), and the wear surface of the sample is characterized by combining one-dimensional surface power spectrum density (PSD_ID) and two-dimensional surface power spectrum density (PSD_IID). The results show that the contact stress is increased from 10.6 MPa to 15.9, 19.1 and 21.1 MPa, the wear rate is increased by 11%, 109% and 592% gradually. On the other hand, the furrow phenomenon that appears on the damaged surface is gradually serious and the wear form is abrasive wear. At the same time, the PSD_ID and the PSD_IID values are increased, with the maximum PSD_ID value increasing by 22%, 94% and 598% respectively, showing the same trend as the change of wear rate. The PSD_ID is mainly concentrated in the space frequency range from 0-0.0075 μm^-1, the PSD_IID graph has obvious trend peak distribution. The wear surface of the pin sample has obvious dominant spatial frequency, it indicates that the wear surface morphology has certain similarity and the wear mechanism has not changed. Furthermore, the prediction results of PSD on wear mechanism and trend are consistent with the SEM results, which can be used to assist analysis of QT600-3/40Cr friction pair wear mechanism and trend.

Key words: gate bottom pivot, QT600-3/40Cr, tribological property, wear mechanism, power spectral density

中图分类号:

TG704

秦红玲, 郭文涛, 李雪飞, 赵新泽, 徐翔. 闸门底枢摩擦副QT600-3/40Cr摩擦学性能及磨损表面功率谱密度表征[J]. 机械工程学报, 2019, 55(17): 102-109.

QIN Hongling, GUO Wentao, LI Xuefei, ZHAO Xinze, XU Xiang. Tribological Performance of Gate Bottom Pivot Friction Pair QT600-3/40Cr and Its Wear Surface Power Spectral Density Characterization[J]. Journal of Mechanical Engineering, 2019, 55(17): 102-109.

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闸门底枢摩擦副QT600-3/40Cr摩擦学性能及磨损表面功率谱密度表征

Tribological Performance of Gate Bottom Pivot Friction Pair QT600-3/40Cr and Its Wear Surface Power Spectral Density Characterization

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