Effect of Ageing of Rolling Oil on the Performance of Cold-Rolled Steel

IF 1.8 4区工程技术 Q3 ENGINEERING, CHEMICAL

Lubrication Science Pub Date : 2024-04-06 DOI:10.1002/ls.1708

Subho Chakraborty, Suvendu Sekhar Giri, A. Pandit, A. N. Bhagat, Ravi Prakash, Ajay Kumar Jha

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Abstract

Interaction between the cold rolling oil and substrate at the roll bite has always intrigued the tribologists. In plant conditions, it has been observed that occurrences of surface defects on cold-rolled FHCR coils increase with the ageing of cold rolling emulsion. In this study, the rolling oil was aged at different lab conditions to replicate 6 and 11 months of rolling oil ageing from a particular cold rolling mill. The studies indicated an increase in acid number of the oil. Tribological studies indicated an increase in CoF along with an increase in wear phenomenon on the substrate. The removability of the surface oil becomes difficult with ageing which could lead to potential surface oil residues remaining on the strip after degreasing, resulting in surface defects and dirty coils after annealing. Deterioration in anti-stain property is also observed as ageing progresses. The deterioration in performance is mainly governed by the depletion in additives and generation of free fatty acids within the rolling oil bath. Proper maintenance of the bath ensures lesser defect formation.

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轧制油的老化对冷轧钢性能的影响

冷轧油和轧辊咬合处基体之间的相互作用一直是摩擦学家的研究课题。据观察，在工厂条件下，随着冷轧乳化液的老化，冷轧 FHCR 卷材表面缺陷的发生率会增加。在这项研究中，轧制油在不同的实验室条件下进行了老化，以复制某冷轧厂轧制油 6 个月和 11 个月的老化过程。研究表明，轧制油的酸值增加了。摩擦学研究表明，CoF 增加的同时，基体上的磨损现象也增加了。随着老化，表面油的去除变得困难，这可能导致脱脂后表面油残留在带钢上，造成表面缺陷和退火后线圈变脏。随着老化的进行，防污性能也会下降。性能下降的主要原因是添加剂的消耗和轧制油浴中游离脂肪酸的产生。油浴的适当维护可确保减少缺陷的形成。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Lubrication Science ENGINEERING, CHEMICAL-ENGINEERING, MECHANICAL

CiteScore

3.60

自引率

10.50%

发文量

审稿时长

6.8 months

期刊介绍： Lubrication Science is devoted to high-quality research which notably advances fundamental and applied aspects of the science and technology related to lubrication. It publishes research articles, short communications and reviews which demonstrate novelty and cutting edge science in the field, aiming to become a key specialised venue for communicating advances in lubrication research and development. Lubrication is a diverse discipline ranging from lubrication concepts in industrial and automotive engineering, solid-state and gas lubrication, micro & nanolubrication phenomena, to lubrication in biological systems. To investigate these areas the scope of the journal encourages fundamental and application-based studies on: Synthesis, chemistry and the broader development of high-performing and environmentally adapted lubricants and additives. State of the art analytical tools and characterisation of lubricants, lubricated surfaces and interfaces. Solid lubricants, self-lubricating coatings and composites, lubricating nanoparticles. Gas lubrication. Extreme-conditions lubrication. Green-lubrication technology and lubricants. Tribochemistry and tribocorrosion of environment- and lubricant-interface interactions. Modelling of lubrication mechanisms and interface phenomena on different scales: from atomic and molecular to mezzo and structural. Modelling hydrodynamic and thin film lubrication. All lubrication related aspects of nanotribology. Surface-lubricant interface interactions and phenomena: wetting, adhesion and adsorption. Bio-lubrication, bio-lubricants and lubricated biological systems. Other novel and cutting-edge aspects of lubrication in all lubrication regimes.