摘要
利用火焰喷涂技术在45#钢表面制备了尼龙1010(PA1010)涂层;采用傅立叶转换红外光谱仪和X射线衍射仪分析了涂层的化学及晶体结构特征;采用MM-200型摩擦磨损试验机考察了涂层同不锈钢配副时的滑动摩擦磨损特性;并基于涂层及偶件磨损表面形貌扫描电子显微分析探讨了涂层的磨损机理.结果表明,PA1010原料粉末在热喷涂过程中未发生明显的降解与氧化;PA1010涂层同不锈钢配副时的摩擦磨损性能同载荷密切相关,这是由于载荷影响其向偶件磨损表面转移及成膜所致;PA1010涂层在较低载荷下同不锈钢配副时主要发生轻微粘着磨损,在较高载荷下则主要发生严重粘着磨损及塑性变形.
PA1010 coatings were prepared on AISI-1045 steel substrate by flame-spraying. The PA1010 powders as the raw material and its flame-sprayed coating on the steel were analyzed by means of Fourier transformation infrared spectroscopy and X-ray diffraction, while their thermal degradation and oxidation behaviors were comparatively investigated by means of differential scanning calorimetry. The friction and wear behavior of the resulting PA1010 coating sliding against stainless steel in a block-on-ring configuration was examined on an MM-200 friction and wear tester. The morphologies of the worn coating surface and the counterpart steel ring were observed on a scanning electronmicroscope. It was found that the PA1010 powders did not experience degradationand oxidation during the flame spraying process. The flame-sprayed PA1010 coating had a larger crystallinity than the PA1010 powders, which contributed to increase the wear-resistance of the coating. The friction and wear behavior of the PA1010 coating was closely dependent on the applied normal load, which was attributed to the significant effect of the normal load on the transfer of the PA1010 onto the couterpart surface and its transfer-film-formation thereon. The flame-sprayed PA1010 coating was dominated by mild adhesion as it slid against the stainless steel ring at a small load, while it was characterized by severe adhesion and plastic deformation at a large load.
出处
《摩擦学学报》
EI
CAS
CSCD
北大核心
2004年第4期313-317,共5页
Tribology
基金
国家自然科学基金资助项目(59925513)
中国科学院"百人计划"资助项目.
