Continuous slab-casting of steel in Russia

Parshin, V. M.; Busygin, Volodymyr; Chertov, A. M.; Aizin, Yu. M.; Kuklev, A. V.; Larin, A. V.; Bulanov, L. V.

doi:10.3103/s0967091209080129

Cited by 6 publications

(13 citation statements)

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“…2 видно, что скорость вытягивания слябов шириной 1450 мм изменялась существенно -в 1,3 раза, от 0,63 до 0,82 м/мин. Известно [3][4][5][6][7][8], что скорость разливки в первую очередь зависит от температуры разливаемого металла. Однако четко выраженной зависимости между фактическими значениями этих параметров на рис.…”

Section: Bulletin «Ferrous Metallurgy» • Vol 78 • 9• 2022 -unclassified

Analysis of Ultra-Low Carbon Steel Casting at Curvilinear CCM

STOLYAROV,

POTAPOVA,

YUDIN

2022

Černaâ metallurgiâ. Bûlletenʹ naučno-tehničeskoj informacii

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Ultra-low carbon steel with a carbon content of no more than 0.006% is produced in the BOF shop of PJSC MMK. After the oxygen converter, a semi-product is subjected to a long ladle processing at the ladle-furnace unit (LFU), a circulation degasser and again at the LFU. Casting of such steel is carried out at all five slab casters operated in the shop. However, about three-quarters of the steel is cast at two curved-type combined casters operating in a two-strand mode. This fact is explained by the order for the width of continuously cast slabs of the same thickness, equaled to 250 mm. The organization of stable continuous casting of ultra-low carbon steel by the “re-smelting method” is a problematic issue. Analysis of the serial casting of this steel at curvilinear casters of the combined type was carried out in the frame of this work. The study was carried out by the method of statistical processing of production data of 69 smelting operations using correlation and regression analysis. Ultra-low carbon steel was represented by grades 006/IF, CR4, CR5, DX54D, DX57D, A365-A13, A365-A14. Slabs with a thickness of 250 mm had the following width: 1450 mm (24 smelting operations); 1560 mm (14 smelting operations); 1650 mm (9 smelting operations); 1750 mm (17 smelting operations); 1850 mm (5 smelting operations). The speed of drawing slabs from the mold varied from 0.60 to 0.82 m/min (0.70 m/min on average). Decreasing dependence of the duration of casting ulta-low carbon metal of one heat on the width of the cast slabs at combined casters of curvilinear type was established as a result of the study. The casting of metal is carried out in series of five smelting operations. The casting speed of slabs of the same width (1450 mm) varies in a wide range in 1.3 times. The main parameter influencing the speed of casting is the sequence of smelting in the series. With an increase in the serial number of the smelting operations, the average casting speed decreases connected with accumulation of organizational delays.

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Section: Bulletin «Ferrous Metallurgy» • Vol 78 • 9• 2022 -unclassified

Analysis of Ultra-Low Carbon Steel Casting at Curvilinear CCM

STOLYAROV,

POTAPOVA,

YUDIN

2022

Černaâ metallurgiâ. Bûlletenʹ naučno-tehničeskoj informacii

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“…The obtained data on temperature dynamics of continuously cast billets along their length testify on non-effective tuning of secondary cooling. So, intensive cooling of billet surfaces in the first secondary cooling segments with consequent heating of surface layers induces appearing of additional thermal stresses in solidified metal, what is considered as the main cause of forming of cracks with different form and depth [1][2][3][4][5][6][7][8][9][10]. In addition to this, billet straightening within the temperature range from 900 to 700 °C, which corresponds to the interval of γ → α transformation, is the additional cause of appearance of transverse cracks, especially on tracks of mould oscillation.…”

Section: Examination Of Thermal Conditions Of Solidificationmentioning

confidence: 99%

“…Continuous casting is at present time the main production method for steel billets, because it provides high yield, required productivity and regularity of up-to-date steelmaking production. However, continuous casting technology is connected with arising of increased stresses in hardened crust, what can lead to forming of hot cracks on the surface and across the section of billet [1][2][3][4][5], which deteriorate billet quality. Round continuously cast billet is especially sensitive to forming of hot cracks [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Improvement of the secondary cooling mode for continuous casting of round billets at Ural Steel JSC

Shapovalov¹,

Dema²,

Amirov³

et al. 2021

cisisr

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“…It is known that long product manufacturing parameters depend significantly on quality of the concast billet which is defined both by the properties of cast steel and the parameters of continuous casting [5][6][7][8][9]. Given the variety of product mix and properties of cast steel grades as well as the individual technological and design features of the casting process, the authors of this study have made an attempt to analyze, based on statistical methods, the continuous casting technology implemented at UMMC Steel LLC in order to improve the billet quality.…”

Section: Introductionmentioning

confidence: 99%

Effect of Continuous Casting Parameters on Quality of Billets Manufactured by UMMC Steel LLC

Калитаев

Тутарова

Shapovalov

2017

SSP

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The analysis of the production records on casting 150õ150mm billets at UMMC Steel LLC has made it possible to define the basic factors worsening the billet quality and increasing the rejection of the rolled materials: steel casting in case the sulfur and phosphorus content exceeds 0.015 % and overheat is more than 30°Ñ. In order to minimize the formation of local nonuniformity in the billets manufactured from low carbon and medium carbon steel, open cast by CCM, it is necessary to maintain a maximum [Mn]:[S] ratio with [Mn]:[Si] ratio at the level less than 2-3, which ensures the formation of fusible deoxidation products and prevents the formation of solid conglomerates in steel. In order to reduce the formation of axial porosity it is advisable to retain the carbon content at the lower limit for the steel grade and avoid overheating of steel above the specified values. In order to minimize the consequences of the overheated steel casting it is necessary to adjust the billet casting rate in accordance with the operating procedures.

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Continuous slab-casting of steel in Russia

Cited by 6 publications

References 0 publications

Analysis of Ultra-Low Carbon Steel Casting at Curvilinear CCM

Analysis of Ultra-Low Carbon Steel Casting at Curvilinear CCM

Improvement of the secondary cooling mode for continuous casting of round billets at Ural Steel JSC

Effect of Continuous Casting Parameters on Quality of Billets Manufactured by UMMC Steel LLC

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