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DOI: https://doi.org/10.37129/2313-7509.2024.21.173-182

TECHNOLOGY FOR INCREASING THE LONGEVITY OF RESOURCE-DETERMINING ENGINE COMPONENTS

Abstract

Extending the service life of components can be most economically achieved through improving the properties of their surface layer. Surface property management can be carried out by altering the structure of the metal surface layer, as well as its physico-mechanical properties. Comprehensive studies on the formation of composite wear-resistant coatings and their operational properties, obtained through the modification of steel 45 with polymer-mineral and organomineral materials, have led to the development of a technological process for restoring crankshafts with reinforced journals. Increasing the specific load on the tribopair for any combination of shaft hardness and bearing material leads to an increase in the coefficient of friction of the tribological contact. Recommended materials for modifying crankshaft journals (alumosilicate, metallosiloxane-modified alumosilicate, polysaccharide and magnesium carbonate-modified alumosilicate) allow for not only increasing the wear resistance of the shaft but also reducing scoring due to the formation of a metal-polymer-ceramic coating on the surface. The most promising materials are alumosilicate, metallosiloxane-modified alumosilicate, and polysaccharide and magnesium carbonate-modified alumosilicate, which increase the wear resistance of the tribological contact by 8 to 10 times. The technological operation of modifying the shaft journals increases the cost by 12-15% of the restoration cost.

Keywords: tribological contact, technology, modification, journal, repair, composite.

FULL TEXT (in Ukrainian)

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The article was submitted 29.03.2024.