Determination of real boundary cooling conditions is a fundamental requirement for numerical models and simulations to optimize and control selected processes in metallurgy. To obtain these boundary conditions, a special method has been developed. The input temperature history of cooling is obtained from experiments. The measured data are then mathematically evaluated. Realistic boundary conditions, as the heat transfer coefficient between hot surface and the coolant, allow optimization of the cooling sections and the design of their configurations. To realize the cooling test, unique laboratory equipment was developed. It allows setting of cooling conditions close to the plant conditions. The paper presents examples of optimization of work roll cooling, examples of design of sections for in-line heat treatment of metals and procedure for designing new high-pressure descaling sections. The methodology proposed by the Heat Transfer and Fluid Flow Laboratory of the Brno University of Technology is typically used to determine the heat-transfer coefficient on the surface of high-temperature material in the applications of heat treatment, cooling of rolls of hot rolling mills, and high- pressure descaling. The methodology enables identifying the effect of nozzle water jets on the heat-transfer coefficient or on removal of high-temperature scale and leads to cooling and descaling optimization for industrial partners.
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P. Kotrbacek, M. Pohanka, M. Zachar, and K. W. Schorkuber, “Optimization of work roll cooling in rolling,” in: Proc. METEC & 4th ESTAD 2019 European Steel Technology and Application Days, CCD Congress Center, Dusseldorf, Germany (2019), pp. 24–28.
P. Kotrbacek, M. Raudensky, J. Horsky, and M. Pohanka, “Experimental etudy of heat transfer in hot rolling,” Revuede Metallurgie- Cahiers d Informations Techniques, 103, No. 7-8, 333–341 (2006).
J. Kominek, P. Kotrbacek, and J. Horsky, “Design of cooling systems for grooved rolls,” in: Proc. METAL 2016. 25th Int. Conf. on Metallurgy and Materials, TANGER Ltd. Ostrava (2016), pp. 255–260.
A. B. Sychkov, O. N. Tulupov, A. B. Moller, S. A. Levandovskii, D. I. Kinzin, and G. Ya. Atangulova (Kamalova), “Formation of structure and properties of a shape steel rolled stock by its in-line heat treatment,” Model. Razv. Protsess. OMD, No. 3 (30), 11–17 (2019).
J. Horsky, M. Raudensky, and P. Kotrbacek, “Experimental study of long product cooling in hot rolling,” J. Mater. Process. Technol., 80/81, 337–340 (1998); https://linkinghub.elsevier.com/retrieve/pii/S0924013698001915.80-81.
P. Kotrbacek, M. Pohanka, M. Chabicovsky, and M. Raudensky, “Study of heat transfer distribution during plate heat treatment,” in: Proc. METEC & 4th ESTAD 2019 European Steel Technology and Application Days, CCD Congress Center, Dusseldorf, Germany (2019), pp. 24–28.
V. E. Otavrovskaya, V. G. Efremenko, D. S. Zotov, R. I. Sagirov, V. I. Zurnadzhi, and Yu. G. Chabak, “Influence of the rolling pattern after deformation cooling on the mechanical properties of flat rolled stock of V INTER_EXCELLENCE NB-AL-containing steel,” Metalozn. Termichn. Obrobka Metal., No. 1 (84), 70–75 (2019).
S. I. Bogodukhov, I. Sh. Tavgilov, and Kh. L. Nguen, “Heat treatment of wear-resistant cast irons,” Intellekt. Innovatsii. Investitsii, No. 6, 71–77 (2017).
M. Yu. Matrosov, P. G. Martynov, A. V. Mitrofanov, K. Yu. Barabash, T. V. Goroshko, and M. I. Zvereva, “Studying the influence of heat-treatment conditions on the formation of microstructure and required mechanical properties of high-strength low-alloyed steel flat rolling stock with guaranteed hardness (400–450 NV),” Chern. Metallurg., 75, No. 4, 480–488 (2019).
M. Chabicovsky and J. Horsky, “Factors influencing spray cooling of hot steel surfaces,” in: Proc. METAL 2016. 26th Int. Conf. on Metallurgy and Materials, TANGER Ltd., Ostrava (2017), pp. 77–83.
J. Horsky and P. Kotrbacek, “In-line heat treatment of long products,” in: Porc. METAL 2014. 23rd Int. Conf. on Metallurgy and Materials, Tanger Ltd. Ostrava (2014), pp. 1–6.
M. Raudensky, M. Chabicovsky, and R. Turon, “Development and plant verification of tube quenching unit,” in: Proc. 7th Int. Congr. on Science and Technology of Steel Making, Associazione Italiana di metallurgia, Milano (2018), pp. 1–8.
M. Hnizdil and P. Kotrbacek, “Heat treatment of rails,” Materiali in Tehnologije, 51, No. 2, 329–332 (2017).
M. Chabicovsky, J. Horsky, M. Raudensky, M. Hnizdil, and P. Kotrbacek, “Design of quenching units for heat treatment of tubes,” in: Proc. European Conf. on Heat Treatment 2015 and 22nd IFHTSE Congr., Associazione Italiana di metallurgia, Milano (2015), pp. 1–9.
M. Raudensky, J. Horsky, A. Horak, J. Pohanka, and P. Kotrbacek, “Hydraulic descaling improvement, findings of jet structure on water hammer effect,” Revue de Metallurgie, 2, No. 104, 84–90 (2007).
R. R. Dema, D. A. Kuvshinov, R. N. Amirov, S. P. Nefed’ev, and N. Sh. Tyuteryakov, “Development and introduction of the method for hydraulic removal (suppression) of secondary scale in finishing stands of hot-rolling mills,” Proizv. Prokata, No. 10, 27–33 (2015).
A. N. Shushura and K. N. Zaitsev, “Control of hydraulic descaling of flat rolling stock based on genetic algorithms,” Vost.-Evrop. Zh. Peredov. Tekhnol., 6, No. 3 (60), 22–25 (2012).
G. S. Sukov, V. I. Rudenko, E. V. Oshovskaya, O. V. Antykuz, and R. V. Rudenko, “Theoretical foundations of the designing of hydraulic descaling devices,” Metallurg. Protsessy Oborudov., No. 1 (1), 35–38 (2005).
V. P. Rodionov, A. I. Ukolov, and P. P. Starovoitov, “Hydrodynamic descaling in the rolling phase,” Territoriya Nauki, No. 1, 70–74 (2018).
B. L. Ivanov, B. G. Ziganshin, R. F. Sharafeev, and I. R. Sagbiev, “Theory of fluid spraying by nozzles,” Vest. Kazanskogo Gos. Agrarn. Univ., 14, No. 2 (53), 95–99 (2019).
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The authors thank the Ministry of Education, Youth and Sports for financial support under program INTER_EXCELLENCE (project LTAUSA19053) and the Brno University of Technology for providing project No. FSI-S-20–6478.
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Translated from Metallurg, Vol. 64, No. 8, pp. 6–13, August, 2020.
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Pohanka, M., Kotrbacek, P., Bartuli, E. et al. Energy-Efficient Cooling and Hydraulic Descaling Systems. Metallurgist 64, 729–740 (2020). https://doi.org/10.1007/s11015-020-01050-4
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DOI: https://doi.org/10.1007/s11015-020-01050-4