The dependences of the coefficients of friction, wear rates, and temperatures of the friction pair steel-polyurethane filled with powders of nonferrous metals on the friction path and load are studied. Polyurethane was filled with copper, tin bronze, zinc, and babbit powders. The tribological characteristics were investigated at different concentrations of the fillers in polyurethane and different particle sizes of the fillers. Secondary structures on the friction surfaces are examined and the relationship between the structure and composition of the secondary structures with the tribological characteristics is analyzed.
Modern tribosynergetic approaches are used to analyze and discover experimentally cases of the formation of secondary structures when using powders of some non-ferrous metals to fill polyurethane. It is found that all elements that are present in the tribocontact zone participate in the formation of secondary structures. These elements are supplied from the polyurethane specimen material, steel counterbody, and lubricant. The degree of development of the secondary structures depends on the elements involved in the process of their formation, as well as the severity and duration of the friction process. Attempts are made to find the dependence of the composition of the structures on the tribocontact intensity.
Tribopairs of steel-polyurethane filled with high-stannous Babbitt B83 powder are studied in comparison with the copper powder filler in terms of self-organization. The friction surfaces and composition of secondary structures appearing in the tribocontact of steel 45 rollers with polyurethane blocks filled with Babbitt powder are examined. The optimal composition of the filler proved to be 10% of B83. New structures atypical of classical thermodynamics are revealed.
The paper discusses structural adaptability during friction from the viewpoint of the theory of self-organization. The friction surfaces and the composition of secondary structures formed during rubbing of steel-45 rollers against polyurethane blocks containing metal powder fillers of various compositions are studied. New secondary structures not characteristic of classical thermodynamics are revealed.
