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Grease-lubricated tribological behaviour of nitrided layer on 2Cr13 steel in vacuum

机译：真空中2Cr13钢上渗氮层的润滑脂润滑摩擦学行为

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摘要

Tribological behaviour of the nitrided layer sliding against self-mating under dry sliding and grease-lubricated conditions in vacuum was investigated on a pin-on-disk type tribometer, with the interaction among the nitrided layer and grease being focused on. The morphologies of the worn surfaces were observed by scanning electron microscopy (SEM). The chemical states of typical elements on the worn surfaces of the nitrided disks and pins were examined by means of X-ray photoelectron spectroscopy (XPS). The chemical compositions of grease samples taken from worn surfaces on the nitrided disks were analysed by Fourier transform infrared spectroscopy (FTIR). Experimental results show that under grease-lubricated conditions, the nitrided layer exhibits lower average friction coefficient and higher wear resistance than those for the dry sliding. In the former case, the wear of nitrided layer shows a transition from the mild adhesive to the severe adhesive wear and even to the delamination wear, with increasing normal load from 10 to 90 N. In the latter case, a transition takes place from the mild abrasive wear to the micro-fatigue type one with increasing the normal load. Tribochemical reactions occur between the nitrided layer and perfluoropolyalkyl ether (PFPE) grease during the lubricated sliding of the nitrided disks against self-mating in vacuum.
机译：在针盘式摩擦计上研究了氮化层在干滑动和油脂润滑条件下在自配合下滑动对自配合的摩擦学行为，重点研究了氮化层与油脂之间的相互作用。通过扫描电子显微镜（SEM）观察磨损表面的形态。通过X射线光电子能谱（XPS）检验了氮化磁盘和销钉磨损表面上典型元素的化学状态。通过傅立叶变换红外光谱（FTIR）分析了从氮化圆盘的磨损表面获取的润滑脂样品的化学成分。实验结果表明，在脂润滑条件下，氮化层的平均摩擦系数较低，耐磨性高于干式滑动层。在前一种情况下，渗氮层的磨损表现为从轻度粘合剂到严重的粘合剂磨损乃至分层磨损的转变，法向载荷从10 N增加到90N。在增加正常载荷的情况下，微疲劳类型的磨损较轻。在氮化盘的润滑滑动过程中，在真空中自配合时，在氮化层和全氟聚烷基醚（PFPE）润滑脂之间会发生摩擦化学反应。

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  • 来源
    《Applied Surface Science》 |2010年第13期|p.4072-4080|共9页
  • 作者

    Jianqun Yang; Yong Liu; Zhuyu Ye; Dezhuang Yang; Shiyu He; Xinlei Li;

  • 作者单位

    School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;

    School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;

    School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;

    School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;

    School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;

    School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    nitrided layer; PFPE grease; vacuum; wear mechanism; tribochemical reactions;

    机译：氮化层PFPE润滑脂;真空;磨损机理摩擦化学反应;

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