EXPERIMENTAL DETERMINATION OF THE SYNERGISTIC COMPONENTS OF TRIBOCORROSIVE WEAR OF Ni-Cu-Mo-AUSFERRITIC DUCTILE IRON

The paper presents results of a two-stage study on the tribocorrosive wear of ADI alloy cast iron containing Ni and Cu. In the first stage of the wear tests with use test rig type pin-on-plate, there were determined the parameters of the process of tribocorrosion of the ADI cast iron in 3.5% NaCl solution. In the second stage, the tests were carried out on a test rig simulating real operating conditions of chain wheels used in armoured face conveyors. The purpose of this study was to demonstrate the impact of the combined action of corrosive agents (water and NaCl) and quartz abrasive on the wear of the wheels tested. As part of the test, the abrasive wear in the presence of the abrasive material alone and in the presence of a mixture of the abrasive material, water and NaCl was determined. The microstructure and the hardness of the surface layer as a function of the distance from the surface were also determined. During the study it has been found that regardless of the type of test there is a synergy between the effects of corrosion and friction which led to an increase of the resulting wear by 30%.