一种高碳钢低温干摩擦行为的研究.docx
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1、一种高碳钢低温干摩擦行为的研究Title: Study on the Low-Temperature Dry Friction Behavior of High Carbon SteelAbstract:In this study, the low-temperature dry friction behavior of high carbon steel was investigated. The effect of loading pressure, sliding velocity, and sliding distance on the coefficient of friction
2、and wear rate was studied using a reciprocating ball-on-disk tribometer. The microstructure and surface morphology of the worn surface were observed and analyzed by scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS). The results showed that the coefficient of friction
3、increased with increasing sliding velocity and pressure. The wear rate initially increased with increasing sliding distance and then gradually decreased. The worn surface showed brittle fracture, deformation, and adhesive wear. The increase in carbon content in high carbon steel led to higher hardne
4、ss and tensile strength, which promoted the formation of a harder and denser oxide layer, enhancing its wear-resistance.Introduction:High carbon steel has high hardness, excellent wear resistance, and high strength, making it ideal for applications in heavy machinery and engineering. However, during
5、 dry friction, high carbon steel is vulnerable to severe abrasive wear, adhesive wear, and fatigue wear. Understanding the friction and wear behavior of high carbon steel at low temperatures can help design more efficient and durable components for these critical applications.Experimental Procedures
6、:A high carbon steel sample (C=0.8%) was mounted on a reciprocating ball-on-disk tribometer. The testing parameters were varied as follows: sliding velocity (0.05-0.2m/s), sliding distance (0.5-2km), and loading pressure (1-5N). The friction coefficient was measured automatically throughout the test
7、, and the wear rate was calculated from the mass loss of the sample. After testing, the worn surface was analyzed using SEM and EDS.Results and Discussion:The results showed that the coefficient of friction increased with increasing sliding velocity and pressure. This behavior can be attributed to a
8、n increase in energy dissipating mechanisms, including surface roughness, adhesive bonding, and plastic deformation. The wear rate initially increased with increasing sliding distance and then gradually decreased. This behavior could be attributed to the formation of a protective oxide layer, which
9、reduced the contact between the surfaces.The SEM images of the worn surface showed areas of brittle fracture, deformation, and adhesive wear. The EDS analysis indicated the presence of iron oxide, carbon, and trace amounts of other elements.In conclusion, the low-temperature dry friction behavior of
10、 high carbon steel was investigated in this study. It was found that the increase in carbon content led to higher hardness and strength, promoting the formation of a harder and denser oxide layer, enhancing the wear-resistance of high carbon steel. The results of this study can help optimize the des
11、ign of high carbon steel components, leading to greater efficiency and durability. Keywords: high carbon steel, low-temperature friction, wear mechanism, oxide formation, wear-resistance.Further analysis of the results showed that the formation of the oxide layer on the worn surface played a crucial
12、 role in reducing wear rates. The oxide layer was formed due to the reaction between the high carbon steel and oxygen in the atmosphere, which resulted in the formation of a harder and more wear-resistant surface layer. This layer acted as a barrier between the contacting surfaces, preventing direct
13、 surface-to-surface contact and reducing wear.Additionally, the SEM images showed that the worn surface had craters and furrows. These features indicated the presence of severe abrasive wear caused by the roughness of the contacting surfaces. It was also observed that the wear debris was mainly in t
14、he form of iron oxide particles, indicating that the oxide layer played a vital role in reducing wear.The results of this study suggested that the low-temperature dry friction behavior of high carbon steel could be enhanced through proper surface treatment methods. For instance, the formation of a p
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