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Effect of Temperature on Sliding Wear Mechanism under Lubrication Conditions

Experimental program using ball-on-cylinder tester has been conducted to investigate the effects of temperature, normal load, sliding speed and type of lubricating oil on sliding wear mechanism. The worn surfaces and debris have been examined. Surface examination of the tested samples using scanning electron microscope SEM was used to study the wear particles and the wear surfaces. The results show that the temperature of the oils affects the probability of adhesion, oxidation, wear rates, and friction coefficient. At room temperature (40 o C) and under lubrication conditions, friction and wear decreases with the increase of the running time. The increase in applied normal load tends to reduce the friction in all types of oils. The phosphorated oil SAE 90 was superior in minimizing friction and wear as compared with other oils. The results have shown that the lubricant temperature has a significant role in wear mechanism.