重庆理工大学学报(自然科学) ›› 2023, Vol. 37 ›› Issue (4): 123-132.

• 机械·材料 • 上一篇    下一篇

活塞环表面液相等离子体电解碳硼共渗研究

赵卫东,朱昭君,姚江微   

  1. 江苏大学 汽车与交通工程学院,江苏 镇江 21201
  • 出版日期:2023-05-06 发布日期:2023-05-06
  • 作者简介:赵卫东,男,博士,副教授,主要从事等离子体技术及应用、生物质能转化应用方面的研究,Email:zhaowd@ujs. edu.cn

Study on liquid-phase plasma electrolysis carbon-boronizing on piston ring surface

  • Online:2023-05-06 Published:2023-05-06

摘要: 活塞环表面强化可减少活塞环缸套摩擦磨损,提高机械效率,是商用车低碳化战略 实现的重要途径与保障。为提升活塞环性能,尝试采用液相等离子体电解碳硼共渗(PEC/B)的 技术方案,进行了活塞环表面改性的研究,系统探究了操作参数对工件表面形貌、硬度、相组成、 截面形貌、元素分布和摩擦学性能的影响规律。研究结果表明,改性层主要由渗硼层和渗碳过 渡层组成,渗硼层主要组成相为 Fe2B,渗碳过渡层的主要组成相为 Fe3C,渗碳处理可有效提升 渗硼效率。改性层厚度最大可达 15μm以上,渗硼层硬度最大可达 1460HV。经碳硼共渗处理 后,工件的摩擦因数、磨损率约为未处理工件的 11%、7%,摩擦学性能显著提升。液相等离子 体电解碳硼共渗为活塞环性能的提升提供了切实可行的技术途径。

关键词: 活塞环, 液相等离子体, 碳硼共渗, 摩擦因数, 磨损率

Abstract: Strengthening the surface of a piston ring can reduce friction and wear of the piston ring cylinder liner and improve engine efficiency, which is an important way and guarantee for the realization of the low-carbon strategy of commercial vehicles. In order to improve the performance of the piston ring, this paper carries out a research on the surface modification of the piston ring by means of liquid-phase Plasma Electrolytic Carburizing and Boronizing (PEC/B) technology. Then, the effects of the operating parameters on the surface morphology, hardness, phase composition, cross-sectional morphology, element distribution and tribological properties of the workpieces are systematically explored. The research results show that the modified PEC/B layer is mainly composed of a boronized layer and a carburized transition layer. The main composition phase of the boronized layer is Fe2B, and that of the carburized transition layer is Fe3C. Boronizing efficiency can be effectively improved by carburizing treatment. The maximum thickness of the modified layer can reach more than 15 μm, and the maximum hardness of the boronized layer can reach 1 460HV. After PEC/B modification treatment, the friction factor and weight loss rate of the workpieces are about 11% and 7% of those of the untreated ones, and the tribological performance significantly improves. It shows that liquid-phase PEC/B can provide a feasible technical way to improve the performance of piston rings.

中图分类号: 

  • TG174.4