Antiwear Coatings for Multi-material Composite Hydraulic Cylinder. A Tribological Study

Abstract

Due to many advantages, composite materials are more and more widely used in the production of high-strength machine parts. An example of such an element is a hydraulic cylinder. Conventional hydraulic cylinders are made of steel, which, after appropriate treatment, ensures satisfactory conditions of cooperation between the inner surface of the cylinder and the piston seal. In the case of a cylinder made of composite material, it is necessary to check the tribological properties of the material surface and the potential selection of a material to act as an internal liner. Four materials were selected in the study - epoxy resin, polyurethane resin, CFRP and a commercial material used for sliding elements. Ball-on-disk tests were carried out and wear traces were observed using a non-contact profilometer.