Study on friction and wear properties of stainless steel and the metal-impregnated carbon materials used as collector shoe in subway
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摘要: 利用销-盘式高速摩擦磨损试验机研究了工况因素（电流、滑动速度和加载力）对地铁集电靴用浸金属碳材料与不锈钢盘试样载流摩擦磨损性能的影响，采用扫描电子显微镜与三维形貌仪对试样磨损表面进行观察与分析。结果表明，接触副摩擦系数随电流的增加而减小，随滑动速度和加载力的增加而增加；载流条件下，集电靴浸金属碳磨损量随电流、滑动速度和加载力的增加而增加；接触副磨损表面粗糙度随电流、滑动速度和加载力的变化情况与磨损量变化趋势相同。Abstract: The influences of electric current, sliding speed, and loading force on the friction and wear properties of stainless steel specimens and the metal-impregnated carbon materials used as collector shoe in subway were studied on pin-on-disk high speed friction and wear tester. The scanning electron microscope (SEM) and the three-dimensional topography profiler were used to observe and analyze the wear surface of the specimens. The results show that, the friction coefficient of contact pair decreases with the increase of electric current and increases with the increases of sliding speed and loading force. The abrasion loss of metal-impregnated carbon used as collector shoe increases with the increases of electric current, sliding speed, and loading force. The surface roughness of contact pair shows the same variation trend as the abrasion loss with the increases of electric current, sliding speed, and loading force.
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Key words:
- collector shoe /
- metal-impregnated carbon materials /
- stainless steel /
- current-carrying /
- friction /
- wear
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图 1 盘-销式高速载流摩擦磨损试验机原理图
Figure 1. Schematic diagram of pin-on-disk high speed friction and wear tester
图 2 摩擦系数与滑动速度和电流的变化关系
Figure 2. Variations of friction coefficient with sliding speed and electric current
图 4 磨损量随滑动速度和电流的变化
Figure 4. Variations of abrasion loss with sliding speed and electric current
图 6 不同电流条件下销试样磨损表面形貌：（a），（b）I = 0 A；（c），（d）I = 200 A
Figure 6. Wear morphology of pin sample surfaces at different electric currents: (a), (b) I = 0 A; (c), (d) I = 200 A
图 7 表面粗糙度随滑动速度和电流的变化
Figure 7. Changes of surface roughness with sliding speed and electric current
表 1 接触副材料化学成分（质量分数）
Table 1. Chemical composition of contact couple
% 接触副材料 主要成分 其他成分 浸金属碳 61.4% C、37.7% Cu S、Si、O 不锈钢 20.6% Cr、5.3% Ni、74.0% Fe Mn、Si 
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