Abstract

An experimental and theoretical method of triboanalysis is proposed to characterize the antifriction properties of polyamides and composites based on them, used in self-lubricated metal-polymer sliding bearings. The indicators of wear resistance of the materials are determined experimentally. The generalized parameters of the mathematical model of wear used in the design of metal-polymer bearings are calculated. The dependences (diagrams) of wear resistance of unfilled polyamides PA6, PA66, and polyamide composites PA6 + 30GF, PA6 + 30CF, PA6 + MoS₂, and PA6 + oil paired with steel 45 on specific friction force are obtained and a comparative assessment of the wear resistance is given. The influence of contact pressure on the friction coefficient is studied and a significant decrease in the latter with increasing contact pressure is shown. A decrease in the Vickers hardness and elastic modulus of the surface layer of the studied materials during wear is also established. It is more significant for unfilled polyamide PA66 (by 1.66 times), PA6 + 30CF (by 1.5 times), PA6 + MoS₂ (by 1.41 times), and less noticeable for polymer composites PA6 + 30GF and PA6 + oil by 1.21 and 1.09 times, respectively. The fact should be taken into account in tribological calculations of metal-polymer sliding bearings. The research results are presented in the form of diagrams, which allow one to compare the wear resistance of the investigative materials in a wide range of specific friction forces. Thus, the practical significance of the results lies in the possibility of their use in tribological engineering to predict the service life of metal-polymer plain bearings and validate the choice of antifriction materials for their manufacturing.

中文翻译：

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金属聚合物滑动轴承用聚酰胺耐磨材料的摩擦分析

摘要

提出了一种摩擦分析的实验和理论方法，用于表征用于自润滑金属聚合物滑动轴承的聚酰胺和基于其的复合材料的减摩性能。材料的耐磨性指标是通过实验确定的。计算了金属聚合物轴承设计中使用的磨损数学模型的广义参数。_{未填充聚酰胺 PA6、PA66 和聚酰胺复合材料 PA6 + 30GF、PA6 + 30CF、PA6 + MoS 2}的耐磨性关系（图表），以及PA6+油与45钢配对的比摩擦力，并给出了耐磨性的比较评估。研究了接触压力对摩擦系数的影响，结果表明，随着接触压力的增加，摩擦系数显着下降。还发现，所研究材料的表面层在磨损过程中维氏硬度和弹性模量会下降。_{对于未填充的聚酰胺 PA66（1.66 倍）、PA6 + 30CF（1.5 倍）、PA6 + MoS 2}更显着（1.41 倍），而聚合物复合材料 PA6 + 30GF 和 PA6 + 油则不太明显，分别为 1.21 和 1.09 倍。在金属聚合物滑动轴承的摩擦学计算中应考虑这一事实。研究结果以图表的形式呈现，使人们能够比较研究材料在各种特定摩擦力下的耐磨性。因此，该结果的实际意义在于其在摩擦学工程中的应用的可能性，以预测金属聚合物滑动轴承的使用寿命并验证其制造时减摩材料的选择。