摘要
利用均匀试验设计方法考察了火焰喷涂尼龙1010涂层在干摩擦条件下同GCr15钢配副时的摩擦磨损性能;利用SPSS统计软件对试验结果进行了回归分析,建立了涂层摩擦系数和磨损质量损失同pv值相关性的数学模型;采用扫描电子显微镜分析了涂层磨损表面形貌,进而探讨了涂层的磨损机理.结果表明,所建立的回归模型可信、可行,具有显著性和统计意义;火焰喷涂尼龙1010涂层在不同试验条件下的摩擦磨损性能同pv值密切相关;这是由于尼龙1010涂层的粘弹性因摩擦表面温度不同而明显不同所致;当pv值较低时,涂层摩擦表面温度相对较低,涂层仅发生弹性变形,相应的摩擦系数较小;随着pv值的增加,涂层摩擦表面温度升高、破坏加剧,故摩擦系数和磨损质量损失增大;当pv值足够大时,涂层摩擦表面温度进一步升高,部分涂层发生熔融并形成润滑膜,相应的摩擦系数和磨损质量损失降低.涂层的主要磨损机理为塑性变形、疲劳磨损和粘着磨损.
An MRH-3 friction and wear tester was performed to evaluate the friction and wear behavior of flame-sprayed nylon1010 coating sliding against SAE52100 steel in a block-on-ring configuration, making use of uniform design method. The friction and wear test results were regression analyzed making use of Windows SPSS 11.0 statistics software. Thus a mathematical model was established to correlate the friction coefficient and wear mass loss of the coating with the PV value, while the worn surface morphologies of the coatings under different test conditions were observed on a scanning electron microscope. It was found that the regression formulae had prominence and statistical validity. The friction and wear behavior of the flame-sprayed nylon-1010 coating under different test conditions was closely related to the PV value, which was because the visco-elasticity of the coating varied with the variation of the sliding surface temperature. The nylon-1010 coating was dominated by elastic deformation at a smaller PV value which corresponded to a lower sliding surface temperature, thus the friction coefficient and wear mass loss were smaller in this case. The sliding surface temperature and damage increased with increasing PV value, thus the friction coefficient and wear mass loss increased as well. At a high enough PV value, the sliding surface of the coating would experience local melting and form some kind of lubricating film, hence the friction coefficient and wear mass loss increased. The nylon-1010 coating was dominated by plastic deformation, fatigue, and adhesive wear.
出处
《摩擦学学报》
EI
CAS
CSCD
北大核心
2004年第5期429-432,共4页
Tribology
基金
河南省自然科学基金资助项目(0311022400)
河南省高校青年骨干教师资助项目(2001)
郑州轻工业学院科研基金资助项目(2002)
河南省教育厅科技攻关资助项目(2003530293).
关键词
火焰喷涂
尼龙1010
涂层
摩擦磨损性能
均匀试验设计
Flame spraying
Mathematical models
Scanning electron microscopy
Wear of materials
Wear resistance
