DOI: 10.18503/1995-2732-2025-23-1-36-43
Abstract
A theoretical method is proposed for determining the fluctuations range in the parameters of the microgeometry of the cold-rolled strip surface during its tempering in rough rolls, taking into account the disturbing effect of the temper mill equipment elements and the thickness of semi-finished rolled stock. Quantitative data were obtained on the effect of tension instability of the tempered strip, run-out of the support rolls and changes in the state of the rough surfaces of the roll and semi-finished rolled stock on the range of fluctuations in the reproduction coefficient of the parameter Rav of the roll surface on the strip and the parameter Rap of the surface of the tempered strip. Using the example of the most popular rolled products with a width of 1500-2000 mm and a thickness of 0.65-0.9 mm with acceptable deviations from ±0.07 to ±0.11 mm, depending on the accuracy group according to GOST 19904-90, it is shown that the variation in the Ra parameter of the tempered strip only in thickness ranges from 3.4% for high accuracy to 5.6% for normal accuracy. Taking into account the influence of all disturbing effects on the tempering process, the range of fluctuations in the Ra parameter of the rough surface of the strip can reach values of 10.2 and 13.8%, depending on the level of disturbing effects, if automatic strip thickness control systems are not used. The results obtained can be used by rolling mill specialists to adjust the condition of the temper mill equipment and its operating conditions in order to satisfy consumers of cold-rolled sheet of tempered strip in terms of the fluctuations range of the parameter Ra.
Keywords
fluctuation of roughness parameters, cold-rolled strip, tempering
For citation
Zvyagina E.Yu., Ogarkov N.N., Terentyev D.V., Rumyantsev M.I. Determining the Fluctuation Range in the Microgeometry Parameters of the Strip Surface During Temper Rolling in Rough Rolls of the Temper Mill. Vestnik Magnitogorskogo Gosudarstvennogo Tekhnicheskogo Universiteta im. G.I. Nosova [Vestnik of Nosov Magnitogorsk State Technical University]. 2025, vol. 23, no. 1, pp. 36-43. https://doi.org/10.18503/1995-2732-2025-23-1-36-43
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