University of Twente Student Theses
A pure sliding experiment to examine wear on possible coatings for greaseless open gears
Reuling, Niek (2024) A pure sliding experiment to examine wear on possible coatings for greaseless open gears.
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Abstract: | In the offshore industry, ships have gear systems to ensure the rotation and translation required during operation. Current systems use grease to reduce friction and wear. Grease can spill into the sea out of these systems, leading to environmental risks despite using biodegradable lubricants. A proposed solution is to coat the pinion with a laser-clad added cobalt-based superalloy. The experimented coatings are Stellite 21, Stellite 6 and Stellite 190. These typically show a low wear rate and friction coefficient. Wear and friction are system properties so to determine the quality of the coatings, it should be experimented on, mimicking the real system. Tribological experiments were conducted to evaluate these coatings' wear and friction properties in various lubrication conditions (no lubrication, purified water, seawater, and grease) and under varied loads, velocities, and hardness levels, using a disc-on-disc setup. This is done under pure sliding. The results are analysed for the specific wear rate and wear morphology with friction properties to further understand underlying phenomena. Results indicate that Stellite 190 significantly reduced wear relative to the uncoated material, although the grease-lubricated uncoated pinion experienced better friction and wear performance due to boundary lubrication. |
Item Type: | Essay (Master) |
Clients: | Huisman Equipment, Schiedam, The Netherlands |
Faculty: | ET: Engineering Technology |
Subject: | 51 materials science, 52 mechanical engineering |
Programme: | Mechanical Engineering MSc (60439) |
Link to this item: | https://purl.utwente.nl/essays/104317 |
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