Study on Indentation Response of Cold Rolled Strip Steel

Zhou, Wei; Wang, Hongbin; Huo, Qing-hui

doi:10.1007/s11665-021-05500-1

Cited by 3 publications

(1 citation statement)

References 35 publications

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“…Cold rolled strip steel is widely used in the production of steel that applied to automobile, household, packaging, construction and various fields benefited from its superior surface quality and comprehensive performance. 1 To smooth the surface of the strip steel, the major adoption was direct spraying tempering lubricant onto industrial wet rolling process. 2 Whereas, this very kind process was generally open processing, besides, the rolling pressure brought by the rolls increased the temperatures of the tempering lubricant.…”

Section: Introductionmentioning

confidence: 99%

Study the reuse possibility of tempering lubricant for cold‐rolled strip wet‐rolling processing

Zhao

Chen

Zeng

2023

Lubrication Science

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In the wet rolling process of industrial cold‐rolled strips, the tempering lubricant was discarded after one‐time use, which resulted in huge waste and high costs for wastewater treatment. In order to explore the reuse value and feasibility of the tempering lubricant, the influences of industrial rolling were to be studied first. In the comparison of before and after‐use‐ tempering lubricant, the surface tension decreased by 34%, and the physicochemical indicators such as electrical conductivity, pH, and total alkali value decreased by 4%–14.3%. In terms of the components and related effects, about 15% of heavy organic matter, such as fatty acids and alcohol amine was responsible for lubrication, rust prevention, and corrosion inhibition. These heavy organic solutes would reduce by 2%–6%, with impurities increasing after rolling. However, the waste tempering lubricant still had a high reuse value. Further from the influence of impurities and microorganisms, it was concluded that if the solid powders were filtered out, the bacteriostatic agent was added after 3 days, and the changes in the effective substance concentration of the tempering lubricant were mastered to replace 1/3 of it in time during recycling, then the reuse of the tempering lubricant was feasible.

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Section: Introductionmentioning

confidence: 99%

Study the reuse possibility of tempering lubricant for cold‐rolled strip wet‐rolling processing

Zhao

Chen

Zeng

2023

Lubrication Science

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Selection of Various Indications of Tempering Lubricant Concentration Reuse in the Wet Rolling Process

Junjian,

Yijun,

Sheng

et al. 2024

Lubrication Science

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Discarded tempering lubricants retained significant reuse potential, making their recycling a vital step in reducing resource wastage and wastewater treatment costs in the strip steel industry. Hence, developing an accurate, rapid evaluation indicator for recycled fluid concentration was essential for facilitating this process. Research showed that among common evaluation indicators for metal fluids, three—electrical conductivity, refractive index and total base number (TBN)—due to their high linear correlation with tempering lubricant concentration (R2 > 0.995), could be utilised to monitor the dynamic changes in the concentration of tempering lubricants. Subsequent experiments on reused tempering lubricants revealed that electrical conductivity, significantly altered by iron powder (7%–24% variance), and refractive index, impacted by hydraulic oil (3% deviation), highlighted contaminant challenges; yet, filtration effectively mitigated iron powder's effect on TBN. Finally, A 17‐day reused tempering lubricants simulation demonstrated consistent effectiveness of the three indicators in monitoring the need to update tempering lubricant concentration. However, in terms of sensitivity, precision, and particularly stability and relative mean deviation, the TBN concentration evaluation indicator outperformed, with TBN (3.38%) < Refractive Index (7.92%) < Electrical Conductivity (11.05%). This indicates the TBN method's superior stability over conductivity and refractive index methods, with its accuracy deviation below 2%, making it a stable, simple and reliable metric worthy of broader adoption.

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