THE SYNERGISTIC EFFECTS OF OIL ADDITIVE SULPHURIZED OLEFIN WITH CHEMICO-THERMAL TREATMENT SURFACES OF STEEL

The addition of various extreme pressure and antiwear additives in lub ricating oil is an important and effective way of reducing friction an d wear. The application of chemico-thermal treatments on surface of ma terials is another effective way of improving the tribological behavio ur of rubbing pairs. The synergistic effects of oil additive sulphuriz ed olefin, with sulphurized, nitrided and oxynitrided surfaces of 1045 steel, on the tribological behaviour have been systematically studied on a ball-on-disc testing machine. Increasing load bearing capacity a nd friction reduction results have been obtained. The mechanism of thi s synergistic effect is discussed based on the microanalysis of the su rface film using AES and XPS.