INCREASING THE WEAR RESISTANCE OF INTERNAL COMBUSTION ENGINE CYLINDER LINERS BY APPLYING ANTIFRICTION COATINGS

Abstract

Since the service life of internal combustion engines depends on the durability of cylinder-piston group parts, the development of effective technologies for the restoration of cylinder liners that increase their wear resistance and durability is of particular importance. The effectiveness of the combination of finishing antifriction non-abrasive treatment and the method of cold plastic deformation – deforming broaching in the restoration of cylinder liners has been proposed and proven. The original design of a modeling device for testing the wear resistance of the cylinder liner working surface, including a counterbody that simulates a set of piston rings simultaneously interacting with the working surface of the liner, was developed. The use of the proposed accelerated testing methodology significantly reduces the time required to conduct wear tests. The technology for restoring cylinder liners using finishing antifriction non-abrasive treatment and deforming broaching reduces wear on the working surface compared to traditional processing. The technical solutions applied in this work increase the wear resistance of the machined parts.