Water‐based Cu nanofluid as lubricant for steel hot rolling: Experimental investigation and molecular dynamics simulation

Abstract

The lubrication performance of Cu nanofluid was studied through hot rolling tests and non‐equilibrium molecular dynamics simulation. Results showed that nanofluid with 0.5 wt% Cu nanoparticles possessed the optimal effect in reducing the rolling force, finish rolling thickness and rolled surface roughness. The superior lubrication performance was attributed to the formation of protective tribofilm made of Fe/Cu debris, iron and copper oxides as well as amorphous substances with a thickness of about 24 nm, which avoided the direct contact of steel strip and the roll, thus inhibiting the adhesion wear. Molecular dynamics simulation disclosed that the rolling‐dominated motion pattern of Cu nanoparticles with 74.1% rolling and 25.9% sliding motion contributed to a significant decrease in the friction force. Besides, surface defects including the peaks and valleys were polished and repaired by nanoparticles respectively, thus developing the surface quality of hot rolled products.

Using artificial intelligence to predict the tribology behavior of MoS2-Al2O3 hybrid nanofluid

“…The application of appropriate lubricants is a convenient and effective approach to solve these issues. With the revolutionary development of nanotechnology in past decades, nanofluids containing nanoparticles in the sized range of 1 ∼ 100 nm have attracted increasing interest in the field of lubrication, such as metal-based nanoparticles (MoS 2 [2], TiO 2 [3], Cu [4]), carbon-based nanoparticles (graphene oxide [5], carbon nanotube [6] and carbon quantum dots [7]) and other inorganic nanoparticles (SiO 2 [8], BN [9]). The application of nanoparticles in fluids can enhance the frictionreduction and anti-wear behavior of lubricants especially under mixed and boundary lubricating conditions [10].…”

Analysis of TiO2 Nanolubricant Influence in Micro Deep Drawing of Stainless Steel SUS301

“…Traditional liquid lubricants can effectively reduce friction in many macro-scale metal forming processes. However, they cannot be directly applied in the MDD process because the lubricant film is hard to form and maintain under high contact pressure at the micro scale [ 13 , 14 , 15 , 16 ]. To address this problem, adding nanoparticles (NPs) into the base lubricant has been identified as one of the best solutions [ 9 , 16 , 17 , 18 ].…”

“…However, they cannot be directly applied in the MDD process because the lubricant film is hard to form and maintain under high contact pressure at the micro scale [ 13 , 14 , 15 , 16 ]. To address this problem, adding nanoparticles (NPs) into the base lubricant has been identified as one of the best solutions [ 9 , 16 , 17 , 18 ]. To further examine the potential of utilising NPs for this purpose, Wu et al [ 19 ] investigated the tribological behaviour of the lubricant with TiO 2 NPs and found that using the nanolubricant can effectively alleviate the overflow and reduce the friction in the steel-to-steel sliding process.…”

Quartic autocatalysis on horizontal surfaces with an asymmetric concentration: water-based ternary-hybrid nanofluid carrying titania, copper, and alumina nanoparticles

“…It was discovered that the significant thermal transfer rate was explained by the heat absorption and Brownian motion parameters; and that the effect of entropy, which in the case of Cu-blood flow increased on the walls, was much less significant than these two factors in the flow's centre. Through hot rolling tests and non-equilibrium molecular dynamics simulation, the lubrication capabilities of Cu nanofluid were investigated by He et al [42]. According to the findings, nanofluid containing 0.5 weight per cent of Cu nanoparticles had the best impact on lowering the rolling force, finish rolling thickness, and rolled surface roughness.…”