Preparation, characterization, tribological and lubrication performances of Eu doped CaWO4 nanoparticle as anti-wear additive in water-soluble fluid for steel strip during hot rolling

A Comprehensive Review of Water-Based Nanolubricants

“…These SiO 2 NPs not only filled the surface defects such as pores and cracks, but also removed the peaks protruded from the surface [29]. The other mechanism that contributed to the decrease in surface roughness was the formation of tribofilm, and hence the direct contact between the work roll and the workpiece was relieved [276]. When the concentration of nanoadditive exceeded the optimal one, the agglomeration of NPs might aggravate the friction and wear in the contact zone, thereby increasing the surface roughness.…”

“…Several studies were devoted to decreasing the oxide scale thickness during hot steel rolling by the use of various nanoadditives in water, including Eu-doped CaWO4 NPs [276], SiO2 NPs [100], MoS2-Al2O3 nanocomposite [118], and TiO2 NPs [24,28,29,52]. Some possible mechanisms of the decrease in oxide scale thickness have been proposed.…”

“…Given the increase in rolling deformation, the lattice distortion energy increases, and the dislocation density also increases, which respectively provides the driving force and nucleation sites for grain nucleation and therefore the grain refinement [290]. In some other cases, however, the grain size of surface microstructure would not change significantly after hot rolling with water-based nanolubricants [118,276], which might be ascribed to the slight differences in the deformation rate and the cooling rate of the lubricants being used.…”

Preparation, characterisation and lubrication performances of Eu doped WO3 nanoparticle reinforce Mn3B7O13Cl as water‐based lubricant additive for laminated Cu‐Fe composite sheet during hot rolling

“…The results show that nanoparticles exhibit excellent tribological properties when added into the base liquid as anti‐wear additives, which is helpful for the production of high‐quality surface quality. Many researchers have studied the lubrication properties of nanoparticles, such as CaWO 4, 3 SiO 2, 4 MoS 2, 5 Mn 3 B 7 O 13 Cl, 6 TiO 2, 7 GO, 8 with outstanding tribological properties. Padgurskas 9 showed that Fe, Cu and Co nanoparticles significantly reduced metal friction and wear.…”

“…At the same time, nanoparticles can fill surface pits, 13,14 polish the surface, 14,15 increase the viscosity of the base fluid, 15,16 improve the bearing capacity of the lubricant, 17,18 and improve the quality of the metal surface 19 . Many studies have shown that the preparation conditions of nanoparticles, such as PH value, and the lubricants directly affect the metal surface lubrication under different conditions of acidity and alkalinity 3,20‐22 . At present, there are few studies on the tribological behaviour of nanoparticles as nanolubricant in laminated Cu‐Fe composite sheet rolling processing, especially in the hot rolling lubrication.…”