1100℃下MoSi2涂层的高温摩擦磨损性能研究

中国机械工程 ›› 2010, Vol. 21 ›› Issue (19): 2364-2368.

1100℃下MoSi₂涂层的高温摩擦磨损性能研究

胡小平1,2;颜建辉2;黄之初1;张厚安3

1.武汉理工大学,武汉,430070

2.湖南科技大学,湘潭,411201

3.厦门理工学院,厦门,361024

出版日期:2010-10-10 发布日期:2010-10-20
基金资助:
国防基础科研计划资助项目(A3720060115)；国家自然科学基金资助项目(50405041)
National Defense Basic Scientific Research Project（No. A3720060115）;
National Natural Science Foundation of China（No. 50405041）

Research on Friction and Wear Performance of MoSi₂Coating at High Temperature of 1100℃

Hu Xiaoping1,2;Yan Jianhui2;Huang Zhichu1;Zhang Hou’an3

1.Wuhan University of Technology, Wuhan,430070

2.Hunan University of Science and Technology,Xiangtan,Hunan,411201

3.Xiamen University of Technology, Xiamen, Fujian,361024

Online:2010-10-10 Published:2010-10-20
Supported by:

National Defense Basic Scientific Research Project（No. A3720060115）;
National Natural Science Foundation of China（No. 50405041）

摘要/Abstract

摘要：

为提高K403镍基高温合金的高温耐磨损能力,采用大气等离子喷涂在镍基上制备了金属间化合物MoSi₂涂层,比较分析了基体和涂层与Al₂O₃配对摩擦副在1100℃下的高温摩擦磨损性能,并采用X射线衍射仪和扫描电镜对摩擦磨损表面进行了物相、形貌和成分分析,进而分析了基体和涂层的磨损机理。研究结果表明：K403合金的摩擦因数在0.35~0.5范围内变化,而MoSi₂涂层的摩擦因数在0.65左右波动;MoSi₂涂层的磨损率约是基体材料的0.5倍,涂覆MoSi₂涂层后,提高了镍基高温合金耐高温磨损能力;镍基合金的高温摩擦磨损机制主要为氧化磨损和疲劳断裂,载荷较小（10N）时,MoSi₂涂层的磨损机制主要表现为氧化磨损,较大载荷（40N）时,MoSi₂涂层的磨损机制主要表现为氧化磨损和疲劳脆性断裂。

关键词:

MoSi₂涂层, 镍基合金, 高温摩擦磨损性能, 磨损机理

Abstract:

In order to improve the wear resistance of K403 nickel-based alloy at high temperature in air, a molybdenum disilicide coating was prepared on its surface by air plasma spraying.Phase composition,morphology and component of the worn surface were observed by scanning electron microscope (SEM) with energy dispersive spectrometer (EDS) and X-ray. The friction and wear properties of the bare K403 alloy and MoSi₂ coating at 1100℃ were also studied. Results show that the friction factor of K403 alloy ranges from 0.35 to 0.5 and that of MoSi₂ coating fluctuates around 0.65. The wear rate of MoSi₂ coating is about half of that of K403 alloy. Compared with the bare K403 alloy, the wear resistance of substrate was improved after coated MoSi₂ coating. The wear mechanism of nickel-based alloys is oxidation wear and fatigue fracture. When the load is smaller (10N), the main wear mechanism of MoSi₂ coating is oxidation. However, the main wear mechanism of MoSi₂ coating is oxidation and brittle fracture when the load is higher (40N).

Key words:

MoSi₂ coating, nickel-based alloy, tribilogical property at high temperature;wear mechanism

中图分类号:

胡小平, 颜建辉, 黄之初, 张厚安.

1100℃下MoSi₂涂层的高温摩擦磨损性能研究

[J]. 中国机械工程, 2010, 21(19): 2364-2368.

HU Xiao-Beng, YA Jian-Hui, HUANG Zhi-Chu, ZHANG Hou-An.

Research on Friction and Wear Performance of MoSi₂Coating at High Temperature of 1100℃

[J]. China Mechanical Engineering, 2010, 21(19): 2364-2368.

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1100℃下MoSi₂涂层的高温摩擦磨损性能研究

Research on Friction and Wear Performance of MoSi₂Coating at High Temperature of 1100℃

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