高铝铜合金粗粉超音速等离子喷涂层的边界润滑摩擦特性.pdf

第22卷第11期
中国有色金属学报
2012年11月
Vol 22 No 11
The Chinese Journal of Nonferrous Metals
Nov.2012
文章编号:1004-0609(2012)1-3100-07
高铝铜合金粗粉超音速等离子喷涂层的边界润滑摩擦特性
杨效田,王智平,路阳',李霞2,周晶晶
(1.兰州理工大学甘肃省有色金属新材料省部共建国家重点实验室,兰州730050
2.兰州交通大学化学与生物工程学院,兰州730070)
摘要:采用超音速等离子喷涂技术在45#钢基体上制备高铝铜合金粗粉涂层,对涂层进行边界润滑摩擦实验,
分析涂层的摩擦磨损特征及表面元素的质量损失。结果发现:涂层的摩擦因数随外加载荷的增加呈逐渐下降趋势;
尽管麾损量随载荷的增大逐渐增加,但黁损率呈下降趋势,表明随外加載荷的增加涂层耐磨性能逐渐增强。涂层
在中低载荷下以磨粒磨损为主,当载荷达到高载荷540N时,涂层由磨粒磨损向疲劳磨损转变,并在犁沟边缘发
生疲劳磨损的同时表现出轻度的粘着磨损。边界润滑条件下,涂层元素的质量磨损主要表现为Cu元素的损失,
磨粒磨损留下的犁沟为O元素进入摩擦界面提供通道,使涂层表面形成微氧化膜
关键词:高铝铜合金;粉体凃层;超音速等离子;摩擦;磨损
中图分类号:TG174.442
文献标志码
Boundary lubrication tribological property of
high-aluminium copper alloy coarse powders coating made by
supersonic plasma spraying
YANG Xiao-tian, WANG Zhi-ping LU Yang, LI Xia, ZHOU Jing-jing
(1. State Key Laboratory of Gansu Advanced Nonferrous Metal Materials
Lanzhou University of Technology, Lanzhou 730050, China
2. School of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China)
Abstract: The high-aluminium copper alloy coarse powders coating was fabricated on 45#steel substrate by supersonic
plasma spraying. The friction experiment was caried out in the oundary brication conditions, and then, the frictional
and wear characteristics and the surface elements mass loss of the coating were analyzed. The results show that the
friction coefficient of the coating has a gradual decline trend with the increase of the loads, although the wear loss
radually increases with the increase of the loads, the wear rate shows the downward trend, indicating that the
wear-resisting performance of the coating is raally sten hened with the increase of loads. The main wear mechanism
of the coating is abrasive wear in the conditions of the low and middle loads, and then the mechanism transforms to
fatigue wear when the load reaches 540 N At the same time, fatigue wear of he coating not only happens in furrows edge
but also mild ad esion appears In the boundary lubrication conditions, the wear mass loss of the coating elements mainly
shows the loss of Cu element, and the furrows left by abrasive wear provide the channels for O element into friction
interface, bringing about the tiny oxidation film on surface of the coating
Key words: high-aluminium copper alloy; powder coating supersonic plasma; friction; wear
超音速等离子喷涂是近年来兴起的热门研究课其中的粉体熔融并加速到音速以上(400-800m/s)リ。
题,其主要特点是借助超音速等离子体射流,将入射其技术操作简单、成本低廉,可用于制备高性能的金
基金项目:国家自然科学基金资助项目(50774040):中俄国际合作交流项目(2009DFR50570)
收稿日期:2011-1108;修订日期:2012-03-05
通作者:杨效田,副教授,博士:电话:19189E-mail:yangxt@lut.n;yangxiaotian@sohu.com