The study of the tribological properties of one-process and two-process textures after vapour blasting and lapping using pin-on-disc tests

Wear tests were conducted using a pin-on-disc tester. In the experiment, a steel disc of hardness 40 HRC was put in contact with a steel pin of hardness 64 HRC with spherical end. Disc samples were prepared in order to obtain very similar values of the Sq parameter of one-process and two-process isotropic surfaces. Dry and lubricated tests, using different contact conditions were carried out. Volumetric wear of one-process disc specimens under dry sliding was smaller for higher roughness. Wear of two-process disc samples was lower than that of one-process surfaces for the same Sq parameter of about 1 mu m. A higher surface roughness resulted in longer distances to steady-state conditions in dry tests. The distances to steady-state conditions were larger for two-process surfaces comparing to one-process textures. Coefficient of friction was smaller when roughness of lubricated surfaces was lower.