Comparison of tribological properties of HVOF sprayed coatings with different composition
Comparison of tribological properties of HVOF sprayed coatings with different composition
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DOI：
10.1016/j.surfcoat.2017.02.021
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发表时间：
2017-05-25
影响因子：
5.4
通讯作者：
Hotamis, Mert
中科院分区：
文献类型：
--
作者：
Karaoglanli, Abdullah Cahit;Oge, Mecit;Hotamis, Mert
本文介绍了一个比较研究的结果进行比较的五个高速氧燃料（HVOF）喷涂涂层对Al 2 O3计数体在干燥条件下滑动的摩擦磨损行为。对沉积在不锈钢基体上的NiCrBSi/WC（50/50）、NiCr（80/20）、WC/Co（88/12）、WC/CoCr和Cr 3C 2/NiCr（75/25）涂层进行了单向球-盘试验，载荷分别为5、15 N，滑动速度分别为10、20 cm/s。为了了解磨损过程，结合EDS对磨损涂层进行了详细的XRD和SEM分析。结果表明，WC/CoCr涂层摩擦系数最低，耐磨性最好，是提高高温磨损部件使用寿命的最佳涂层。其次是WC/Co、Cr 3C 2/NiCr和NiCrBSi/WC。NiCr涂层在所有条件下表现出最差的性能。涂层的磨损量随法向载荷和滑动速度的增加而增加，而WC/CoCr涂层的磨损量则受法向载荷的影响。磨损率随滑动速度的减小和法向载荷的增大而减小。涂层的磨损主要表现为磨粒脱落和划痕。在较软的涂层如NiCr的表面上也观察到塑性变形。(C)2017爱思唯尔B. V.保留所有权利。
This paper presents the results of a comparative study conducted to compare the friction and wear behavior of five high velocity oxy fuel (HVOF) sprayed coatings sliding against Al2O3 counter body under dry conditions. Single way ball-on-disk tests were performed on NiCrBSi/WC (50/50), NiCr (80/20), WC/Co (88/12), WC/CoCr and Cr3C2/NiCr (75/25) coatings, deposited on stainless steel substrates, under normal load of 5, 15 N and sliding speed of 10, 20 cm/s. To understand the wear process, detailed XRD and SEM analysis in combination with EDS of the worn coatings were performed. The results show that the most suitable HVOF sprayed coating to prolong the lifetime of components working at high temperature and wear conditions is WC/CoCr coating owing to its lowest friction coefficient and highest wear resistance. It is followed by WC/Co, Cr3C2/NiCr and NiCrBSi/WC. The NiCr coating exhibited the worst performance at all conditions. Wear volume of the coatings generally increased with the increase in both normal load and sliding speed, while WC/CoCr coating is adversely affected from the normal load. Wear rate decreased with decreasing sliding speed and increasing normal load. The coatings were generally worn by abrasion wear, including particle pull-out and scratching. Plastic deformation was also observed on the surface of softer coatings such as NiCr. (C) 2017 Elsevier B.V. All rights reserved.