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4 CONCLUSION
This paper focused on evaluation of coating
performance of steel substrate which is used in
conveyor rollers which works under highly abrasive
environments. Main objective is to increase the three-
body wear resistance by molybdenum coating using
plasma spray technique. The results obtained from the
experimental analysis proved the improvement in
wear resistance after molybdenum coating. EDAX
and SEM analysis are performed to composition
identification and to find thickness of the coating.
Enhanced resistance to mass loss indicates the
improvement in wear resistance of molybdenum
coated steel. Following observations are made from
the experimental result and analysis
The observed trend indicates that both the
uncoated and coated samples exhibit a linear variation
as the parameters such as speed, load, and grain size
increase.
At lower loads and speeds, the disparity in wear
between the coated specimen and the uncoated
specimen is negligible in comparison to higher loads
and speeds.
The findings indicate that when subjected to
higher loads, an oxide layer is generated on the
surface, acting as a lubricant and decreasing the
friction coefficient. As a result, the presence of
abrasives is reduced, leading to a decrease in mass
loss and material wear.
The experiment was conducted with a consistent
coating thickness ranging from 100 to 150 microns.
This approach can be expanded to create coatings of
different thicknesses.
This research highlights the potential of
molybdenum powder coatings to enhance the
durability and lifespan of steel rollers in conveyor
systems operating in harsh environments. The
findings contribute to the development of effective
strategies for reducing wear and optimizing the
performance of mining and construction equipment.
The experimentation was conducted using the
atmospheric plasma spray process, but it is possible
to expand the study by employing various thermal
spray processes and assessing their performance.
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