Application of statistical methods to reveal and remove the causes of welding of coil laps upon annealing of cold-rolled steel strips


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Abstract

The factors of the process of production of cold-rolled steel strips that promote and hinder the appearance of a coil lap welding defect upon annealing in bell-type furnaces are analyzed using statistical methods. The works dealing with this problem are analytically reviewed to reveal the problems to be studied and refined. The ranking of the technological factors according to the significance of their influence on the probability of appearance of this defect is determined and supported by industrial data, and a regression equation is derived to calculate this probability. The process of production is improved to minimize the rejection of strips caused by the welding of coil laps.

About the authors

E. A. Garber

Cherepovets State University

Author for correspondence.
Email: mamz2011@mail.ru
Russian Federation, Cherepovets

E. V. Diligenskii

Cherepovets State University

Email: mamz2011@mail.ru
Russian Federation, Cherepovets

P. V. Antonov

PAO Severstal

Email: mamz2011@mail.ru
Russian Federation, Cherepovets

D. L. Shalaevskii

Cherepovets State University

Email: mamz2011@mail.ru
Russian Federation, Cherepovets

I. A. Dyatlov

PAO Severstal

Email: mamz2011@mail.ru
Russian Federation, Cherepovets

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