Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
SLIDING WEAR OF LUBRICATED AISI 304 STAINLESS STEEL
Submission Author:
camila marinho clemente , DF
Co-Authors:
camila marinho clemente, Edison Gustavo Cueva Galárraga
Presenter: camila marinho clemente
doi://10.26678/ABCM.COBEM2017.COB17-2212
Abstract
The use of lubricants in mechanical systems is widely known in the industry, especially in the automotive industry. The technological innovation of automobiles aiming to improve their performance and autonomy leads to develop new designs of machines, materials and types of lubricants. The automotive market demands, each day, vehicles that are faster and more powerful and, at the same time, quieter and less polluting. One of the variables involved in the quest to achieve these characteristics is the lubricant used. In many cases, the suitability of the lubricants to the new mechanical requirements leads to the use of additives capable of improving their performance at high temperatures and pressures, or simply to modify their friction characteristics. The objective of this work was to construct a wear-testing machine, pin-on-disk Tribometer, which allowed studying the wear behavior of AISI 304 stainless steel, rubbing against itself in a lubricated environment, under a relative velocity of 5.4 m/s. Tests were performed using three types of lubricants: SAE 15W40, SAE W90 and the additive Millitec-1, mixed with SAE 5W40. For each condition, three normal loads were used: 5, 10 and 25 N. In addition, a dry test was performed to serve as an initial reference. During the tests, the friction forces and the contact temperatures were monitored in real time. The wear was evaluated by measures of mass loss and the coefficient of friction, while the surface damage was accompanied by measurements of surface roughness and analysis by optical microscopy and scanning electron microscopy. The results showed that the higher frictional forces and surface damages were obtained in the dry tests, regardless of the loading condition tested. SAE W90 oil was the best set of properties, followed by SAE 15W40 and SAE 15W40 mixed with the Millitec-1 additive.
Keywords
lubricated friction, test bench, sliding wear, AISI 304 stainless steel, Militec-1 additive
