Ryabchikov M.Yu., Ryabchikova E.S., Chuta A.S., Vasilyeva E.I., Emelyushin A.N. Influence of Steel Strip Speed and Tension on Product Defects on Continuous Hot-Dip Galvanizing Lines

DOI: 10.18503/1995-2732-2023-21-4-93-104

Abstract

Problem Statement (Relevance). Recent advances in steel strip heat treatment control on continuous hot-dip galvanizing lines contribute to optimizing line speed for current production conditions. However, errors in strip tension control with frequent changes in speed conditions can lead to coating defects. Objectives. The paper is devoted to identifying defects in galvanized sheet products, which can limit the productivity of continuous hot-dip galvanizing lines due to problems in controlling steel strip tension, and searching for the causes of such defects. Methods Applied. The authors analyzed the data on defects in the products of one of the continuous hot-dip galvanizing lines of MMK Metalurji in Turkey. To exclude the influence of interfering factors, when determining the accompanying circumstances of occurrence of a defect, the stratification was used according to interfering parameters. Such parameters included a defect type, steel grade and strip thickness. The Cochran-Mantel-Haenszel test was used to assess the impact of factors on the defects frequency. Originality. By analyzing big data on defective and non-defective products over around two years, the authors applied the stratification according to many interfering factors and identified the causes of some defects. Result. The authors determined acceptable and unacceptable defects, whose probability increases with increasing line speed or the level of its change. The paper shows the influence of tension on the probability of occurrence of these defects and considers the prospects for further improvement of steel strip tension control systems. Practical Relevance. The results obtained are the basis for further improvement of support systems for production control of galvanized sheet products by factoring into the product quality.

Keywords

continuous hot-dip galvanizing, steel strip, defects, tension, strip speed, performance

For citation

Ryabchikov M.Yu., Ryabchikova E.S., Chuta A.S., Vasilyeva E.I., Emelyushin A.N. Influence of Steel Strip Speed and Tension on Product Defects on Continuous Hot-Dip Galvanizing Lines. Vestnik Magnitogorskogo Gosudarstvennogo Tekhnicheskogo Universiteta im. G.I. Nosova [Vestnik of Nosov Magnitogorsk State Technical University]. 2023, vol. 21, no. 4, pp. 93-104. https://doi.org/10.18503/1995-2732-2023-21-4-93-104

Mikhail Yu. Ryabchikov – PhD (Eng.), Associate Professor of the Department of Automated Control Systems, Nosov Magnitogorsk State Technical University, Magnitogorsk, Russia. Email: This email address is being protected from spambots. You need JavaScript enabled to view it.. ORCID 0000-0001-5337-0951

Elena S. Ryabchikova – PhD (Eng.), Associate Professor of the Department of Automated Control Systems, Nosov Magnitogorsk State Technical University, Magnitogorsk, Russia. Email: This email address is being protected from spambots. You need JavaScript enabled to view it.. ORCID 0000-0001-6441-1157

Artur S. Chuta – student of the Department of Automated Control Systems, Nosov Magnitogorsk State Technical University, Magnitogorsk, Russia. Email: This email address is being protected from spambots. You need JavaScript enabled to view it..

Elena I. Vasilyeva – student of the Department of Automated Control Systems, Nosov Magnitogorsk State Technical University, Magnitogorsk, Russia. Email: This email address is being protected from spambots. You need JavaScript enabled to view it..

Aleksey N. Emelyushin – DrSc (Eng.), Professor, Nosov Magnitogorsk State Technical University, Magnitogorsk, Russia. Email: This email address is being protected from spambots. You need JavaScript enabled to view it..

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