Investigation of the scuff resistance for plain bearings

Mechanical Engineering Research Institute, Moscow, Russian Federation

^* Corresponding author: vva-imash@yandex.ru

Published online: 10 March 2025

Abstract

The article considers the issues associated with the evaluation of the scuff resistance of plain bearings with a iron-bronze friction couple ОС 1-22. The statement that laser texturing of cast iron increases the antifriction properties of plain bearings is substantiated. The scuff behaviour of friction surfaces depending on the applied normal load are studied in comparison of surface nitriding and laser processing. The concept of increasing surfaces hardness based on hardening treatments is analyzed. As a result, it was found that laser heat treatment of surfaces is more effective in increasing the damage force rating. The process of changing the friction coefficient depending on the increase in pressure at the contact of tribological surfaces is being studied. The mechanics of the formation of scuffing of the surfaces under the conditions of boundary friction of a cast iron-bronze couple has been studied in relation to the operation of a cast-iron crankshaft of a heavy diesel engine. The method of analytical evaluation of the limit mode of friction on the load makes it possible to perform an approximate assessment of the effectiveness of measures to increase the expected life of a diesel engine.