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中性盐雾对等离子喷涂NiCr-Cr3C2涂层摩擦磨损性能的影响
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海洋腐蚀与防护重点实验室,中船重工七二五所,海洋腐蚀与防护重点实验室,中船重工七二五所,海洋腐蚀与防护重点实验室,中船重工七二五所,中国石油大学华东

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国家高技术研究发展计划项目2012AA09A203和中央高校基本科研业务费资金资助


Effect of Neutral Salt Spray Corrosion on Tribological Properties of SPS Sprayed NiCr-Cr3C2 Coatings
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State Key Laboratory for Marine Corrosion and Protection,Luoyang Ship Materials Research Institute LSRMI,State Key Laboratory for Marine Corrosion and Protection,Luoyang Ship Materials Research Institute LSRMI,State Key Laboratory for Marine Corrosion and Protection,Luoyang Ship Materials Research Institute LSRMI,University of China Petroleum East China

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    摘要:

    利用超音速等离子喷涂(SPS)技术制备了陶瓷相增强的NiCr-Cr3C2涂层,采用线接触往复滑动方式进行摩擦磨损实验,测定了NiCr-Cr3C2涂层/Q235碳钢摩擦副在盐雾腐蚀前后涂层的摩擦系数和磨损量,此外,还采用SEM、EDS等技术观察分析了涂层表面的形貌和微区元素分布,探讨了盐雾腐蚀环境对涂层摩擦磨损性能的影响。结果表明:NiCr-Cr3C2涂层的磨损机制主要为磨粒磨损,而盐雾腐蚀后的磨损机制为腐蚀磨损。盐雾腐蚀后涂层的摩擦系数比盐雾腐蚀前的摩擦系数降低了1/5;不过,盐雾腐蚀后涂层的磨损失重量是盐雾腐蚀前磨损失重量的5倍左右,说明盐雾腐蚀环境加速了其摩擦学性能的恶化,涂层的耐蚀性有待进一步提高。

    Abstract:

    Ceramic phase increased NiCr-Cr3C2 coatings were prepared by HEPJet supersonic plasma spaying (SPS). The friction coefficients and wear loss for NiCr-Cr3C2 coating and Q235 steel pairs under dry and salt spray one week corrosion were measured using the UMT-3 friction and wear tester by line-contact reciprocating sliding. The morphology and element distribution of worn surfaces were examed and analyzed by using SEM, EDS respectively. The effects of salt spray corrosion environment on tribological properties of coatings were discussed. The result showed that, the wear mechanism of NiCr-Cr3C2 coatings was abrasive and adhesive wear, whereas under salt spray corrosion conditions, it became corrosion wear. The friction coefficient under salt spray corrosion conditions significantly reduced by 1/5, but the wear losses under salt spray corrosion conditions were more than that under dry friction conditions about 5 times, which demonstrates that the salt spray corrosion environment accelerated the deterioration of coating’s tribological properties and the corrosion resistance of coating remains to be further improved.

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白杨,邢路阔,李相波,李焰.中性盐雾对等离子喷涂NiCr-Cr3C2涂层摩擦磨损性能的影响[J].稀有金属材料与工程,2017,46(5):1404~1410.[Bai Yang, Xing Lukuo, Li Xiangbo, Li Yan. Effect of Neutral Salt Spray Corrosion on Tribological Properties of SPS Sprayed NiCr-Cr3C2 Coatings[J]. Rare Metal Materials and Engineering,2017,46(5):1404~1410.]
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  • 收稿日期:2015-03-10
  • 最后修改日期:2015-12-11
  • 录用日期:2015-12-11
  • 在线发布日期: 2017-09-27
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