采用端面带孔电极进行电火花沉积制备自润滑涂层

发布时间：2018-03-30 07:32

本文选题：电火花沉积　切入点：自润滑涂层　出处：《材料工程》2017年10期

【摘要】：采用端面带孔电极,在孔中填充MoS2,利用电火花沉积(ESD)方法在高速钢基体上制备Cu-MoS2自润滑涂层。分析自润滑涂层的成分及微观形貌,研究电容、沉积时间对自润滑涂层厚度的影响,以及自润滑涂层的摩擦性能和磨损机理。结果表明:采用这种电极制备的自润滑涂层中只存在MoS2和Cu。其微观形貌显示,自润滑涂层表面凹凸不平,并存在气孔,呈现典型的电火花沉积特征;在第3挡电容下,自润滑涂层的表面质量最好。随着电容、沉积时间的增加,涂层厚度出现先增加后下降的规律。在第3挡下制备的自润滑涂层的摩擦因数最小,随着摩擦时间的增加,在第1挡和第3挡下制备的自润滑涂层的摩擦因数都比较稳定,而在第5挡下制备的自润滑涂层的摩擦因数具有明显的上升趋势。SEM照片表明,磨损表面具有滑移剪切的现象。
[Abstract]:Cu-MoS2 self-lubricating coatings were prepared on high speed steel substrates by means of electrospark deposition (ESD) method. The composition and microstructure of the self-lubricating coatings were analyzed, and the capacitance of the self-lubricating coatings was studied. The effect of deposition time on the thickness of the self-lubricating coating, as well as the friction properties and wear mechanism of the self-lubricating coating are investigated. The results show that only MoS2 and Cu exist in the self-lubricating coating prepared by this electrode. The surface of the self-lubricating coating is uneven and has pores, which shows the typical characteristics of EDM deposition. The surface quality of the self-lubricating coating is the best under the third block capacitance, and with the increase of the capacitance, the deposition time increases. The friction coefficient of the self-lubricating coating prepared under the third block is the smallest. With the increase of friction time, the friction coefficient of the self-lubricating coating prepared under the first and third block is relatively stable. The friction coefficient of the self-lubricating coating prepared under the fifth block has an obvious upward trend. SEM photos show that the wear surface has the phenomenon of sliding shear.
【作者单位】：青岛科技大学机电工程学院;
【基金】：山东省自然科学基金资助项目(ZR2016EEM41) 山东省高等学校科技计划项目(J12LB11)
【分类号】：TG174.4

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