Rewolińska Aleksandra, Perz Karolina, Kinal Grzegorz
Faculty of Civil and Transport Engineering, Poznan of University, PL-60965 Poznan, Poland.
Materials (Basel). 2021 May 30;14(11):2960. doi: 10.3390/ma14112960.
The aim of the research was to evaluate the influence of the initial roughness of a steel pin cooperating with a graphite ring-dry and wet-on the mechanism of sliding layer formation. A ring-pin friction pair was used for the study, where the rings were made of expanded graphite, while the pins were made of acid-resistant steel. In the first case, the steel pin interacted with a dry graphite ring, and in the second case, the graphite rings were moist. To determine the effect of initial surface roughness, the pins were divided into three roughness groups. To determine changes in surface geometry due to material transfer, the Ra and Rz parameters were measured. This project investigated how the initial roughness value of the steel surface pin cooperating with expanded graphite influences the formation of the sliding layer. Increasing the initial roughness of the steel surface interacting with the graphite contributes to faster layer formation and reduced roughness. The state of the expanded graphite-dry and wet-influences the formation of the sliding layer of graphite-a wet graphite component causes a faster smoothing of the steel surface. The running time of the wear apparatus has an effect on the resulting layer. The highest roughness group is the most favorable from the viewpoint of sliding layer formation.
该研究的目的是评估与石墨环（干态和湿态）配合的钢销初始粗糙度对滑动层形成机制的影响。采用环 - 销摩擦副进行研究，其中环由膨胀石墨制成，销由耐酸钢制成。在第一种情况下，钢销与干态石墨环相互作用，在第二种情况下，石墨环是潮湿的。为了确定初始表面粗糙度的影响，将销分为三个粗糙度组。为了确定由于材料转移导致的表面几何形状变化，测量了Ra和Rz参数。该项目研究了与膨胀石墨配合的钢表面销的初始粗糙度值如何影响滑动层的形成。增加与石墨相互作用的钢表面的初始粗糙度有助于更快地形成层并降低粗糙度。膨胀石墨的状态（干态和湿态）影响石墨滑动层的形成——湿态石墨成分会使钢表面更快地平滑。磨损装置的运行时间对形成的层有影响。从滑动层形成的角度来看，粗糙度最高的组是最有利的。
