| 摘要: |
| 针对铝合金缸体内壁油性腐蚀环境中的摩擦工况，采用大气等离子喷涂制得了高铬铸铁涂层和316L不锈钢涂层，采用维氏显微硬度计、图像分析软件、台式扫描电子显微镜及热场发射扫描电子显微镜分别对显微硬度、孔隙率、涂层厚度及结构进行了测试和分析。采用球盘式往复摩擦试验机对比研究了两种涂层与典型缸套材料HT200灰铸铁在大气环境、纯发动机油润滑环境和模拟发动机腐蚀性油润滑环境下的摩擦学性能。结果表明：高铬铸铁涂层在腐蚀性发动机油环境中表现出好的摩擦磨损性能。 |
| 关键词: 铝合金 缸体 油性腐蚀 高铬铸铁 等离子喷涂 摩擦学性能 |
| DOI：10.3969/j.issn.1007-9289.2013.05.014 |
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| Tribological Properties of Highchromium Cast Iron Coating Developed by Plasma Spraying |
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WANG Bin, YAN Fengyun, WANG Yongxin, LI Jinlong, ZENG Zhixiang1,2
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1a. State Key Laboratory of Gansu Advanced Nonferrous Metal Materials, 1b. Key Laboratory of Nonferrous Metal Alloys and Processing, the Ministry of Education, Lanzhou University of Technology, Lanzhou 730050;2a. Key Laboratory of Marine Materials and Related Technologies, 2b. Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, Zhejiang
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| Abstract: |
| Highchromium cast iron (HCCI) and 316L stainless steel (316LSS) coatings were developed by atmosphere plasma spraying to overcome the working conditions of high temperature and friction in the oily corrosive environment that happens in the aluminium alloy engine cylinder. Microhardness,porosity,thickness and microstructure of the coatings were tested and analyzed by digital vickers microhardness tester, image analysis software, desktop scanning electron microscope, and thermal field emission scanning electron microscope, respectively. Comparative experiment was conducted to investigate the tribology performance of the two coatings and HT200 grey cast iron that was a typical cylinder material under air, pure engine oil, and simulative corrosive engine oil conditions. The results show that the highchromium cast iron coating has optimal tribology properties under corrosive condition. |
| Key words: aluminium alloy engine cylinder oily corrosion highchromium cast iron plasma spraying tribological properties |
