A DC magnetic field generator was assembled around the friction region in a four-ball tester. The tribological properties of 150SN base oil and lubricating oil containing modified nano-WS
2
under and without DC magnetic field were studied by modified tribo-tester. The morphology
the content and chemical species of typical elements on the worn surfaces lubricated with the tested oil were examined by SEM-EDS and XPS
and then the tribological mechanism was discussed.
The results indicate that the modified nano-WS
2
has good stability in 150SN base oil. The lubricating oil containing nano-WS
2
exhibits better lubrication performance. In addition
when the nano-WS
2
content is the same
the anti-wear and friction reduction effect of the lubricating oil under DC magnetic field is better. The DC magnetic field had a certain aggregation effect on nano-WS
2
and could increase the possibility of tribochemical reaction.
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Keywords
references
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