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Open AccessArticle

The Role of Nano-TiO2 Lubricating Fluid on the Hot Rolled Surface and Metallographic Structure of SS41 Steel

1
School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
2
Departments of Foundational Science, Beijing Union University, Beijing 100101, China
*
Author to whom correspondence should be addressed.
Nanomaterials 2018, 8(2), 111; https://doi.org/10.3390/nano8020111
Received: 22 January 2018 / Accepted: 11 February 2018 / Published: 16 February 2018
In this paper, nano-TiO2lubricating fluid was chosen as an advanced rolling lubricant to investigate its effect on the hot rolled surface and metallographic structure of SS41 steel strips. The tribological performances of nano-TiO2 lubricating fluid were measured by a four-ball tribotester. The hot rolling experiments under different lubrication conditions were carried out by a four-high rolling mill. The surface morphology, oxide scales and metallographic structure after hot rolling were observed using a confocal laser scanning microscope and scanning electron microscope (SEM), respectively. The composition of surface attachments was analyzed with X-ray photoelectron spectroscopy (XPS). The results indicate that the nano-TiO2 lubricating fluid has a better tribological performance. The surface defects on the hot rolled surface could be decreased. The phase composition of the surface still appears as a mixture of ferrite and pearlite. The surface of steel strips is not micro-alloyed with titanium as predicted. Additionally, the grain size of rolled steel strips which were lubricated with the nano-TiO2lubricating fluid decreased by nearly 50%, compared with traditional lubricating fluid. Furthermore, it was found that the thickness of the oxide layers on the surface reduced, whilst the Rockwell hardness of the oxide layers was enhanced as nano-TiO2 lubricating fluid was applied. View Full-Text
Keywords: nano-lubrication; tribology; hot rolling; surface topography nano-lubrication; tribology; hot rolling; surface topography
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MDPI and ACS Style

Meng, Y.; Sun, J.; Wu, P.; Dong, C.; Yan, X. The Role of Nano-TiO2 Lubricating Fluid on the Hot Rolled Surface and Metallographic Structure of SS41 Steel. Nanomaterials 2018, 8, 111.

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