Akademik Veri Yönetim Sistemi
JOURNAL OF POLYTECHNIC-POLITEKNIK DERGISI, sa.4, ss.1495-1503, 2022 (ESCI)
In recent years, the tribological investigations have been focused on dispersing additives into the oil lubricants to improve their friction and wear properties. Microhardness measurements of the samples made from heat treated hot work tool steel were carried out in this study. The wear and friction behaviour of the samples were investigated under dry condition, base oil and 5%, 10%, 15%, 20% and 25% wt. graphite as oil additive. Wear tests were carried out by means of a ball-on-disc test configuration. Average friction coefficients and wear scar related wear rates were calculated. The morphology of the worn surfaces were analyzed by optical microscopy and scanning electron microscopy (SEM). The study leads to the conclusion that addition of graphite particles improved the wear and friction properties of the lubricant. 5% graphite dispersed oil additive exhibited the best tribological performance in the tests.