FRICTION AND WEAR PERFORMANCE OF AN ELECTROSPARK-DEPOSITED Ta COATING ON CrNi3MoVA ST

  • Zijun Wang School of Equipment Engineering, Shenyang Ligong University, Shenyang 110159, China
  • Guanglin Zhu School of Equipment Engineering, Shenyang Ligong University, Shenyang 110159, China
  • Fengsheng Lu North Huaan Industry Group Co. Ltd, Qiqihaer 161046, China
  • Lei Zhang North Huaan Industry Group Co. Ltd, Qiqihaer 161046, China
  • Yuanchao Wang Shanghai Electro-Mechanical Engineering Institute, Shanghai 201109, China
  • Shuang Zhao School of Equipment Engineering, Shenyang Ligong University, Shenyang 110159, China
  • Cean Guo School of Equipment Engineering, Shenyang Ligong University, Shenyang 110159, China
  • Jian Zhang School of Equipment Engineering, Shenyang Ligong University, Shenyang 110159, China
Keywords: Ta coating, electrospark deposition, nanomechanical properties, friction and wea

Abstract

A Ta coating was prepared on a CrNi3MoVA steel substrate by means of electrospark deposition (ESD) and its friction and wear performance was investigated. The nanomechanical properties and friction coefficient were tested by employing a nanoindenter and a friction and wear testing machine, respectively. Moreover, the phase structure was obtained using X-ray diffraction (XRD), and the morphology and composition were analysed before and after friction utilizing scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS). The results showed that the gradient Ta coating with nanocrystals is composed of -Ta and Fe-Ta intermetallics, and Ta2O5 and -Fe phases. The hardness of the Ta coating increased by 115 % compared to that of the CrNi3MoVA steel and its elasticity was reduced by 21 %. The friction coefficient of the Ta coating was reduced by 81 % compared to that of the CrNi3MoVA steel and its weight loss was reduced by 89 %. The wear mechanism of the Ta coating can be characterized as slight adherence, whilst that of the CrNi3MoVA steel includes severe adherence and fatigue.

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Published
2024-02-05
How to Cite
1.
WangZ, Zhu G, LuF, ZhangL, WangY, ZhaoS, GuoC, ZhangJ. FRICTION AND WEAR PERFORMANCE OF AN ELECTROSPARK-DEPOSITED Ta COATING ON CrNi3MoVA ST. MatTech [Internet]. 2024Feb.5 [cited 2024Apr.25];58(1):17–23. Available from: https://mater-tehnol.si/index.php/MatTech/article/view/894