Open AccessTRIBOLOGICAL BEHAVIOR OF COARSE RAPESEED OIL TESTED ON FOUR BALL TESTER
Author(s) -
Traian Florian Ionescu,
Dionis Guglea,
Constantin Georgescu,
Petrică Alexandru,
Lorena Deleanu
Publication year - 2021
Publication title -
mechanical testing and diagnosis
Language(s) - English
Resource type - Journals
eISSN - 2668-571X
pISSN - 2247-9635
DOI - 10.35219/mtd.2021.1.01
Subject(s) - materials science , tribology , friction coefficient , coefficient of friction , ball (mathematics) , composite material , rapeseed , volume (thermodynamics) , grease , metallurgy , mathematics , chemistry , physics , geometry , food science , quantum mechanics
This paper presents the influence of load and sliding velocity on several tribological parameters like friction coefficient and wear rate of the wear scar diameter of the balls used in a four-ball test, when using rapeseed oil as lubricants. The test parameters for were: loading force - 100 N, 200 N and 300 N (± 5%), sliding speed of 0.38 m/s, 0.53 m/s and 0.69 m/s, corresponding to the spindle speeds of the four-ball machine 1000 rpm, 1400 rpm and 1800 rpm (± 6 rpm), respectively, test time - 60 minutes (± 1%). The test balls are lime polished, made of chrome alloyed steel balls (EN31), having 12.7±0.0005 mm in diameter, with 805 N/mm2 hardness VHN, as delivered by SKF. The sample oil volume required for a test was 8 ml ± 1 ml. A general view of the results on friction coefficient reveals that this vegetal oil could be used in application with mild regime as concerning the load and speed.