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Journal articles on the topic 'Coiling(strip)'

Author: Grafiati

Published: 4 June 2021

Last updated: 8 February 2022

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1

Zhang, Zhi Min, Feng Qin Wang, Fei Li, Shu Zhi Wang, and Xiao Jiang. "Reason Analysis and Solutions of Low Coiling Temperature at Tail of ZSAC1 Strip during U-Type Cooling." Advanced Materials Research 988 (July 2014): 290–95. http://dx.doi.org/10.4028/www.scientific.net/amr.988.290.

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Coiling temperature, finish rolling temperature and running speed of ZSAC1 strip during U-type cooling and number of valves which had been turned on were analyzed in order to find out the reason of low coiling temperature at tail of ZSAC1 strip in U-type cooling process. Results of research showed that running speed of strip and finish rolling temperature were main factors affecting accuracy of coiling temperature. Coiling temperature decreased with the increase of running speed of strip. Coiling temperature fluctuation would occur at the same part of strip when finish rolling temperature increased or decreased. Holding rolling speed and rolling temperature of strip stably can improve accuracy of coiling temperature during downstream U-type cooling.

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2

Zhao, Ke, Zhi Gang Wang, and Chang Ming Liu. "Applying BP Neural Network Model to Forecast the Largest Coiling Torque of down Coilers." Advanced Materials Research 936 (June 2014): 1614–19. http://dx.doi.org/10.4028/www.scientific.net/amr.936.1614.

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Down coiler is an important equipment of hot rolling mill. The coiling torque is changing constantly in the process of strip steel coiling, and the largest coiling torque depends on several factors, such as the material and specification of coiling strip, the coiling temperature and the process parameters and so on. Only when the largest coiling torque is less than the carrying capacity could the coiler work in security. A topology relationship of the largest coiling torque among the materials, the specification of the strip and the coiling temperature is established. Based on the BP(backward propagation of errors) artificial neural network, a predicted formula model of the largest coiling torque in coiling high strength strip is built, which provides a theoretical basis for the development and utilization of the largest working potential of the down coiler. Keywords: Down Coiler; BP Neural Network; Coiling Torque; Forecast

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3

Sun, Tie Jun, Wei Dong Yang, Hai Gao, and Hong Tao Mi. "Coiling Temperature Prediction and Application Based on Genetic-Neural Network on Hot Strip Mill." Applied Mechanics and Materials 448-453 (October 2013): 3417–20. http://dx.doi.org/10.4028/www.scientific.net/amm.448-453.3417.

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Coiling temperature control (CTC) is very important to the quality of the strip steel in Hot Strip Rolling Mill. In the paper, genetic algorithm and neural network method to predict coiling temperature on hot strip mill were put forward. The genetic-neural network was trained and checked with actual production data. The result indicates that the method can real-time predict the strip coiling temperature. The on-line prediction model and step track method has been put into use. The result shows that the method can settle lag influence in feedback control and the CTC control precision is improved greatly.

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4

Liu, En Yang, Wen Peng, Ning Cao, Si Rong Yu, Jun Xu, Liang Gui Peng, and Dian Hua Zhang. "Prediction of Coiling Temperature of Hot Rolled Strip Based on BP Neural Network." Applied Mechanics and Materials 633-634 (September 2014): 679–83. http://dx.doi.org/10.4028/www.scientific.net/amm.633-634.679.

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Coiling temperature of hot rolled strip is one of the important parameters which affect performances of hot rolled strip. The control of coiling temperature is highly nonlinear and time-varying. Based on the laminar cooling control system of a hot rolling plant, a coiling temperature prediction model based on BP neural network was established. Many factors which affect coiling temperature control were taken into account, and the BP neural network was trained by actual production data. The simulation was carried out, which indicates that coiling temperature can be predicted precisely, and the BP neural network model has the prospect of online application.

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5

Hou, Jing, Jin Xiang Pian, Yan Ling Sun, and Ke Xu. "Intelligent Setting Method of Laminar Cooling Process for Hot Rolled Strip." Advanced Materials Research 756-759 (September 2013): 4377–81. http://dx.doi.org/10.4028/www.scientific.net/amr.756-759.4377.

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In order to improve the control accuracy of the coiling temperature of strip in the laminar cooling process when working condition is varying, an intelligent setting method of the cooling water volume is researched in this paper. The strip coiling temperature mechanism model is built firstly. Secondly, the key model parameters are identified with case-based reasoning (CBR) technology to improve the model accuracy. Lastly, the cooling water volume setting method based the model is proposed where disturbance input method is applied. The simulation result showed that the proposed method can improve the strip coiling temperature accuracy when the operation condition is changing. The strip coiling temperature accuracy can be improved due to the CBR technology which can adjust the key model parameters according to the varying operation condition. So, the setting values based the improved model are adjusted with the changing working condition, with self-adaptive ability.

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6

Liu, Xiao Hua, Feng Dong, and Dong Cheng Wang. "Effect of Edge Masking on Residual Stress of Hot-Rolled Strip on Run-Out Table." Advanced Materials Research 1095 (March 2015): 732–35. http://dx.doi.org/10.4028/www.scientific.net/amr.1095.732.

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A numerical model including thermal and microstructural model is established for precisely prediction of residual stress of hot-rolled strip on run-out table. Temperature and phase transformation fraction are coupled and formulated for the calculation of thermal and transformation expansion that could induce internal stress. Residual stress for hot-rolled strip before and after coiling are calculated using C++ program. Influence of edge masking on residual stress is analyzed. It is concluded that edge masking makes the strip flatness better after coiling.

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7

Yu, Xiang Long, Zheng Yi Jiang, Xiao Dong Wang, Dong Bin Wei, and Quan Yang. "Effect of Coiling Temperature on Oxide Scale of Hot-Rolled Strip." Advanced Materials Research 415-417 (December 2011): 853–58. http://dx.doi.org/10.4028/www.scientific.net/amr.415-417.853.

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The influence of the coiling temperature, ranging from 550 to 570°C, on the morphology and the phase composition of the oxide scale formed on the microalloyed low carbon steel for automobiles after hot strip rolling was investigated. Physicochemical characteristics of the oxide scales were examined and their formation mechanism was discussed. Thickness of the oxide scale is in the range of 8-11µm and decreases with a decrease of coiling temperature. The microstructure and phase composition, XRD analysis shows a large amount of magnetite (Fe3O4) and some sparse hematite (Fe2O3) exist on the surface of hot rolled strip when the coiling temperature reduces from 570 to 550°C. The coiling temperature substantially affects the internal microstructure and magnetite phase.

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8

Xie, Hai Bo, Zheng Yi Jiang, Xiang Hua Liu, Guo Dong Wang, Tian Guo Zhou, and A. Kiet Tieu. "On-Line Optimization of Coiling Temperature Control on Run-Out Table for Hot Strip Mills." Key Engineering Materials 340-341 (June 2007): 701–6. http://dx.doi.org/10.4028/www.scientific.net/kem.340-341.701.

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Based on optimization setup technology, an online adaptive calculation method for improving accuracy of strip coiling temperature control on the run-out table (ROT) has been developed and implemented in hot strip mill (HSM). Multi-objective control strategies, which include coiling temperature, middle target temperature and appropriate cooling rates have been finalised. Cooling strategies, elements tracking, and dynamic correction are employed in the control system. In addition, the model optimization and soft-measure method are also introduced in the study. Rolling tests with various grades of steel covering a wide range of thickness show that the developed model can improve the accuracy of coiling temperature control to obtain an uniform mechanical properties. Good correlation has been found between the predicted temperatures and the actual coiling ones.

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9

Imanari, Hiroyuki, and Hiroaki Fujiyama. "Coiling Temperature Control in Hot Strip Mill." IEEJ Transactions on Industry Applications 125, no. 12 (2005): 1105–12. http://dx.doi.org/10.1541/ieejias.125.1105.

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10

Medenkov, A. A., A. I. Traino, and D. I. Alekseeva. "Regimes for coiling thin hot-rolled strip." Metallurgist 30, no. 5 (May 1986): 162–63. http://dx.doi.org/10.1007/bf00741083.

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11

Wang, Yong-qin, Li Li, Xing-chun Yan, Yuan-xin Luo, and Liang Wu. "Modeling of Stress Distribution During Strip Coiling Process." Journal of Iron and Steel Research International 19, no. 8 (August 2012): 6–11. http://dx.doi.org/10.1016/s1006-706x(12)60132-0.

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12

Debiesme, B., I. Poissonnet, P. Poissonnet, and F. Penet. "New coiling temperature control on hot strip mill." Revue de Métallurgie 90, no. 3 (March 1993): 403–10. http://dx.doi.org/10.1051/metal/199390030403.

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13

Nam, Alexander, Uwe Prüfert, Marciej Pietrzyk, Rudolf Kawalla, and Ulrich Prahl. "Simulation of Thermal Phenomena in Reverse Strip-Rolling Process." Materials Science Forum 941 (December 2018): 1424–30. http://dx.doi.org/10.4028/www.scientific.net/msf.941.1424.

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In the reverse hot strip rolling, the coiling and uncoiling of the strip leads to unstable conditions during the forming process. Both the temperature of the strip and the dwell time in the coil vary and influence the microstructure evolution passing in the coil during reverse rolling. It makes the design of this process difficult. Therefore, development of the temperature model for the reverse hot rolling including coiling and uncoiling was the main objective of the paper. The identification of the unknown parameters of the boundary conditions is proposed. Methods for their determination are discussed. The analysis is performed on example of the reverse hot rolling of the magnesium alloy AZ31. The resulting temperature model reveals good agreement with thermocouple and pyrometer measurements.

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14

Jiang, Lu, Thomas Dorin, Ross Marceau, Nicole Stanford, and Peter Hodgson. "Influence of Coiling on Microstructural Evolution and Mechanical Properties of Strip-Cast Low-Carbon Low-Niobium Steel." Materials Science Forum 879 (November 2016): 1182–87. http://dx.doi.org/10.4028/www.scientific.net/msf.879.1182.

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As-cast low-carbon low-niobium steels fabricated by direct strip casting (DSC) were treated by simulated coiling in the lab. Coiling temperatures were carefully selected: (1) 900 ̊C (in the austenite); (2) 700 ̊C (during the austenite-to-ferrite transformation); (3) 650 ̊C (in the ferrite). Optical microscopy and transmission electron microscopy were used to examine the microstructure constituents and the precipitates. Mechanical properties were evaluated by Vickers macrohardness measurements. The results show that coiling treatment has a strong influence on the final microstructure and mechanical properties, thus highlighting the necessity to carefully design the coiling treatment. In addition, the differences in hardness for the three coiling temperatures derive from a complex combination of different strengthening mechanisms.

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15

Zhao, Wei, Yu Liang Chen, and Wen Juan Huang. "Research of Intelligent Control Methods for Hot Strip’s Coiling Temperature." Key Engineering Materials 439-440 (June 2010): 236–40. http://dx.doi.org/10.4028/www.scientific.net/kem.439-440.236.

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This paper briefly describes the importance of coiling temperature control in the strip production process, and analysis which shows that the current existence of coiling temperature control is difficult, for the laminar cooling process is one with a strong non-linear, distributed parameter, time-varying. Intelligent control method is presented and carried out with the Matlab simulation. The simulation result shows that this method will enable the ultimate precision of coiling temperature control within 5 °C.

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16

Wang, Yong Qin, Fei Yu Wang, and Yuan Xin Luo. "Effect of Transmission Error on the Fluctuating Tension Force for Dual-Coiler Machine." Applied Mechanics and Materials 86 (August 2011): 434–38. http://dx.doi.org/10.4028/www.scientific.net/amm.86.434.

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Dual-coiler is one of the most advanced coiling equipment designed for collecting strips in the rolling mill production line for the purpose of storing/transportation. The quality of the steel strip is largely affected by the tension force. This paper devotes to investigate the fluctuating tension force on the steel strip during the coiling process. The dynamics model of driveline is built for simulate the transmission error which is the main cause of the fluctuating tension force. In the proposed model, the time-varying meshing stiffness and damping, and the stiffness of strip are considered. A set of data are measured from the production line for evaluating the presented model. It’s believed that the proposed model can be used for improving the mechanical design of the machine.

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17

Imanari, Hiroyuki, and Haruki Inami. "Flexible Coiling Temperature Control System in Hot Strip Mills." IFAC Proceedings Volumes 45, no. 23 (2012): 187–92. http://dx.doi.org/10.3182/20120910-3-jp-4023.00013.

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18

Choi, Yong Joon, Hae Doo Park, and Min Cheol Lee. "Coiling Simulation and Control Method for Hot Strip Downcoiler." IFAC Proceedings Volumes 39, no. 22 (September 2006): 258–63. http://dx.doi.org/10.1016/s1474-6670(17)30146-5.

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19

Chandra-ambhorn, Somrerk, Supati Ieamsupapong, V. Thanateponake, and Walairat Suksamai. "Effect of Coiling Temperature on the Formation and Pickling Behaviour of Tertiary Scale on Hot-Rolled Carbon Steel Strip." Key Engineering Materials 410-411 (March 2009): 669–76. http://dx.doi.org/10.4028/www.scientific.net/kem.410-411.669.

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Steel strips covered by a tertiary thermal oxide scale from a hot rolling process were studied in this research work. In case that the clean strip is required, i.e. for the cold rolling process, this tertiary scale formed on the steel surface is typically removed by a pickling process. In this work, a finishing temperature – the temperature at the exit of strip from a finishing mill – was kept constant at 830 °C. A coiling temperature – the temperature that the strip was coiled at a down coiler – was varied in a real hot rolling line to obtain different types of tertiary scales formed on low carbon steel strips. Physico-chemical characteristics and pickling behaviour of the scales were further investigated. It was found from a scanning electron microscope (SEM) that the thickness of scale at the centre of strip was in the range of 3-5 m and reduced with the decrease in coiling temperature. A laser Raman spectroscopy was also applied to make a depth profile of scale. Additionally, with the results observed from SEM and X-ray diffraction (XRD), it is concluded that the tertiary scale is a non-homogeneous single layer of a eutectoid structure consisting of magnetite and iron. Moreover, the samples were further immersed in a 10%v/v HCl pickling solution at 80 °C. It was found that the time needed to remove the tertiary scale was reduced with the decreased scale thickness, which was obtained by lowering the coiling temperature. Kinetics of scale removal during pickling is discussed in the paper.

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20

Peng, Liang Gui, En Yang Liu, Dian Hua Zhang, Xiang Hua Liu, and Fang Xu. "Development and Application of Advanced Coiling Temperature Control System in Hot Strip Mill." Advanced Materials Research 421 (December 2011): 140–46. http://dx.doi.org/10.4028/www.scientific.net/amr.421.140.

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Run out table cooling equipment and coiling temperature control (CTC) system, especially mathematic models of a hot strip mill were introduced. Heat transfer models such as air convection model, heat radiation model and laminar cooling model, process control models such as segment tracking model, feedback control model, self-learning model and case-based reasoning model were detailed described. Since online application of the new CTC system, the laminar cooling control system has been running stably and reliably with a high precision of coiling temperature.

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21

Guo, Qiang, Xiao Jun Hu, and Zhen Yong Zheng. "Research in Hot-Rolling Downcoiler Dynamic Torque Control." Advanced Materials Research 572 (October 2012): 72–77. http://dx.doi.org/10.4028/www.scientific.net/amr.572.72.

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Torque control of hot strip coiler affects the telescopicity of steel coil. The hot yield point of steel is different in different temperature, it affects the bending torque of steel strip, the strip coiling temperature is about 500-700,and what obtained through the study of steel hot yield point is that large change of hot yield point happens in every 50 degrees of temperature change. In order to track the load torque accurately, compensation of torque for temperature change is necessary. It can make torque tracking accurately, and improve the telescopicity of steel coil.

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22

Schöttler, Joachim, Thorsten Maiwald, and Gunnar Linke. "Production of Directly Quenched High-Strength Hot-Rolled Strip Steels - Influence of Rolling and Cooling Conditions on Mechanical Properties and Flatness." Materials Science Forum 854 (May 2016): 29–34. http://dx.doi.org/10.4028/www.scientific.net/msf.854.29.

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The production of hot-rolled sheets of high-strength and wear-resistant special structural steels by direct quenching from the rolling heat is a cost effective and energy-saving alternative to traditional production via downstream quenching the previously cut-to-length plates. Reaching the required strength and toughness parameters in combination with best flatness of the sheets requires strict compliance with the pre-set rolling and cooling conditions over the entire strip width. Using two high-strength low-alloyed steels, plant trials have been carried out to study the effect of the cooling conditions and the coiling temperature on mechanical properties, impact toughness and flatness of cut-to-length sheets made of hot-rolled strip. The results showed that by applying optimized cooling pattern and low coiling temperatures, high-strength steel sheets with outstanding mechanical properties and good flatness can be produced.

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23

Lee, Nicolas, and Sigrid Close. "Curved pleat folding for smooth wrapping." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 469, no. 2155 (July 8, 2013): 20130152. http://dx.doi.org/10.1098/rspa.2013.0152.

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A technique is presented to minimize the packaged size of a flat sheet by folding it into a strip that can be wrapped around a hub. This is difficult to accomplish using regular straight creases, because of the thickness of the sheet. A curved crease pattern is used to address this problem of non-zero thickness. A mathematical formulation is developed in order to compute the required crease pattern for coiling a folded strip to any desired curvature, and specifically for coiling it into a tight spiral around a hub. This method is demonstrated with paper models. The crease computation algorithm is then extended to provide a folding strategy to efficiently package a square sheet around a central hub such that it can easily unfold or deploy. This development has applications particularly for deployable structures on small spacecraft.

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24

Kukhar, Volodymyr, Oleksandr Kurpe, Eduard Klimov, Elena Balalayeva, and Vladimir Dragobetskii. "Improvement of the Method for Calculating the Metal Temperature Loss on a Coilbox Unit at The Rolling on Hot Strip Mills." International Journal of Engineering & Technology 7, no. 4.3 (September 15, 2018): 35. http://dx.doi.org/10.14419/ijet.v7i4.3.19548.

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The paper improves the calculation methodology of metal temperature loss during hot rolling process at continuous mills. The proposed methodology can be implemented at hot strip mills with various in-line equipment arrangements within the temperature ranges appropriate for processes simulation of hot rolling, normalized rolling and Thermo-Mechanical Control Process of carbon and microalloyed steels. It provides engineering analysis of unaccounted temperature losses of feed by means of radiation and convection, which, in the first time, through the time factor, additionally accounts for strip motion speed factors, roller table length and feed length, and also length of rolls contact arc with metal. The accountability of the above mentioned factors in the various compositions depending on the rolling method increases the engineering simulation accuracy, ensures the versatility of the elaborated method with respect to different types of mills and makes the scientific novelty of the study. The equations were developed to calculate the metal temperature loss while coiling at the CoilBox unit. The equations accounts for the influence on the temperature of strip length, coiling and uncoiling speed, strip thickness, inside radius of the reeling coil, the time the feed rests being coiled. The improved model was verified based on actual data.

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25

Jung, Y. J., G. T. Lee, and C. G. Kang. "Coupled thermal deformation analysis considering strip tension and with/without strip crown in coiling process of cold rolled strip." Journal of Materials Processing Technology 130-131 (December 2002): 195–201. http://dx.doi.org/10.1016/s0924-0136(02)00705-7.

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26

Slavov, V. I., V. V. Chaschin, S. N. Kostylev, O. M. Naumova, O. S. Khlybov, and A. V. Puchkov. "Impact of Coil Cooling Rate on Texture, Special Boundaries and Properties of Hot Rolled Strip." Materials Science Forum 467-470 (October 2004): 323–28. http://dx.doi.org/10.4028/www.scientific.net/msf.467-470.323.

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This paper overviews the current state of development of the structure and properties formation in hot rolled low alloy strip steel after its coiling. To clarify the effect of coil cooling rate on the mechanical behavior, hydrogen content, corrosion , texture and coincidence site lattice industrial experiments were made at a hot strip mill. It is revealed that the texture and CSL has a notable influence on the complex of properties: strength, ductility, toughness and corrosion resistance.

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27

Woo, Young Yun, Sang Wook Han, Jin Rae Cho, and Young Hoon Moon. "Air jet impingement to reduce hot strip wave on a run-out table." Mechanics & Industry 19, no. 6 (2018): 601. http://dx.doi.org/10.1051/meca/2018037.

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Traveling stability is necessary for a hot rolled strip on a run-out table before coiling in steel mills because it affects the process efficiency and the quality of the rolled products. This study proposes an air jet impingement system to reduce the hot strip wave that occurs during tensionless travel in a run-out table before the top end of the strip reaches the coiler mandrel. The finite element method was used to examine the pressure distributions on the moving strip associated with the parameters in the air jet systems. Experiments were carried out on a pilot-scale air jet impingement system to investigate the performance. The results show that the air impingement in the moving direction effectively reduces the strip wave, and the simulated results agree with the actual measurements and observations.

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28

Sun, Wen Quan, Quan Yang, An Rui He, and Xin Yu Guo. "Research of the Strategy on the Flatness and Gauge Control Based on Coiling Variable Tension Control Process." Advanced Materials Research 572 (October 2012): 98–103. http://dx.doi.org/10.4028/www.scientific.net/amr.572.98.

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Based on the analysis and simulation of the variable tension coiling process, integrated control strategy for strip flatness, thickness and tension has been proposed when the last stand adopts the control means of both position closed loop and pressure closed loop. The strategy pre-controls strip flatness and thickness according to the changing tension to decrease accommodation amplitude and enhance product quality. Practical application shows the strategy improves the control precision on the basis of ensuring the stable operation of unit.

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29

Wang, Hai Fang, Xiao Guang Ren, and Yu Rong. "The Improvement of Laminar Cooling System for Hot Rolled Strip Base on Rolling Process." Advanced Materials Research 690-693 (May 2013): 3295–98. http://dx.doi.org/10.4028/www.scientific.net/amr.690-693.3295.

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Hot strip cooling temperature and its cooling rate is get by strip cooling system and coiling temperature of hot rolled strip is an important parameter on its performance index. It presents laminar cooling system of the 700 mm hot strip mill and the mill rolling process is present, the laminar cooling system is analyzed on the rolling theory and techniques. The laminar cooling system and its problems are present. The improvement programs of laminar cooling system are present, The control system of laminar cooling system is present combining feed-forward main control and feed-backward self-learning control, and measuring instruments is reinstall and water valves is improved. It could be a reference for the similar mill units and new building rolling mills.

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30

Nam, Alexander, Rudolf Kawalla, Alexander V. Zinoviev, Yaroslav A. Erisov, Uwe Prüfert, and Michael Eiermann. "Temperature Validation of 3D Model for the Reversing Hot Rolling in Connection with a Coil Model." Key Engineering Materials 746 (July 2017): 132–37. http://dx.doi.org/10.4028/www.scientific.net/kem.746.132.

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The complex thermal modelling approach of the reversing hot strip rolling in connection with a coil model was developed. The coil model provides the modelling of the (un-) and coiling process. The modelling approach is based on object-orientated principals and implemented in MATLAB using library OOPDE and will be the base for the forecasting of the microstructure and the resulting material properties of strip during the reversing hot rolling. The model was validated using experimental data received after carrying out of the 2-pass reversing hot strip rolling of magnesium alloy AZ31. The results show a sufficient correspondence between experimental and calculated temperatures during the 1st and 2nd rolling pass.

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31

Weisz-Patrault, D., and A. Ehrlacher. "Imposed curvature of an elastic-plastic strip: application to simulation of coils." Mechanics & Industry 18, no. 2 (2017): 218. http://dx.doi.org/10.1051/meca/2016038.

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This work is part of the framework of a fast modeling of winding aiming at improving knowledge of residual stress evolution in steel strips and therefore their flatness during the coiling process. An exact analytical solution of an elastic-plastic strip with isotropic hardening at finite strains under an imposed transformation of curvature is developed. Issues related to flow rules for non-differentiable yield functions (Tresca) have been broached and a unique solution is obtained. The equivalence for this transformation, between von Mises and Tresca yield functions is demonstrated. This solution contributes to an efficient model by terms of computation times that aims at simulating coiling by taking into account inelastic deformations and enabling parametric studies in order to improve the process.

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32

Pholdee, Nantiwat, Won-Woong Park, Dong-Kyu Kim, Yong-Taek Im, Sujin Bureerat, Hyuck-Cheol Kwon, and Myung-Sik Chun. "Efficient hybrid evolutionary algorithm for optimization of a strip coiling process." Engineering Optimization 47, no. 4 (April 16, 2014): 521–32. http://dx.doi.org/10.1080/0305215x.2014.905551.

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33

Wang, Dong Cheng, Feng Dong, and Hong Min Liu. "Study on Transverse Uniformity of Phase Transformation for Hot-Rolled Strip on Run-out-Table." Advanced Materials Research 941-944 (June 2014): 2309–12. http://dx.doi.org/10.4028/www.scientific.net/amr.941-944.2309.

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A numerical simulation of phase transformation for hot-rolled strip on run-out-table are introduced in the present work combined with experiment. Continuous-cooling-transformation (CCT) diagram are used to regress the transformation model of Q345B. Temperature field coupled with phase transformation is analyzed on run-out-table. Evolution of temperature and organization during cooling are analyzed for the hot-rolled strip between the last stand of finishing mill and coiling. It is concluded that the transverse temperature has significant effect on the uniformity of phase transformation.

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34

Nam, Alexander, Uwe Prüfert, Michael Eiermann, and Rudolf Kawalla. "Modelling the Temperature Evolution During Hot Reversing Strip Rolling of Magnesium Alloys." Materials Science Forum 854 (May 2016): 140–45. http://dx.doi.org/10.4028/www.scientific.net/msf.854.140.

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The paper proposes the approach for the thermal through process modelling of the strip hot rolling chain of magnesium alloys. This strip hot rolling chain comprises the coil reheating after the Twin-Roll Casting (TRC) process, storage or transport operations and reversing hot rolling. The modelling of reversing rolling is implemented in connection with the simultaneous un-/coiling process of a coil. The numerical calculation is based on an object-oriented FEM tool kit written in MATLAB™ and is carried out in three spatial dimensions and time.

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35

Karlberg, Mats. "Thermo-Mechanically Coupled Modeling of Cooling Temperature History Effects on Precipitation Hardening in Hot Strip Coiled Products." Materials Science Forum 783-786 (May 2014): 2160–65. http://dx.doi.org/10.4028/www.scientific.net/msf.783-786.2160.

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When producing hot strip, HSLA(High Strength Low Alloyed) products the coiling temperature and the subsequent coil cooling is of great importance for the final mechanical properties. A thermo-mechanically coupled model has been developed where the anisotropic stress dependent thermal properties caused by the layered structure and the asymmetric cooling are included. Additionally the precipitation hardening effect on the yield strength, influenced by the thermal history during cooling was compared with mechanical tensile testing along the strip length at SSAB EMEA works in Borlänge, Sweden. Good agreement between measured and predicted yield stress variations in head and tail was obtained.

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36

Maetz, Jean-Yves, Matthias Militzer, Yu Chen, Jer-Ren Yang, Nam Goo, Soo Kim, Bian Jian, and Hardy Mohrbacher. "Modeling of Precipitation Hardening during Coiling of Nb–Mo Steels." Metals 8, no. 10 (September 25, 2018): 758. http://dx.doi.org/10.3390/met8100758.

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Nb–Mo low-alloyed steels are promising advanced high strength steels (AHSS) because of the highly dislocated bainitic ferrite microstructure conferring an excellent combination of strength and toughness. In this study, the potential of precipitation strengthening during coiling for hot-strip Nb–Mo-bearing low-carbon steels has been investigated using hot-torsion and aging tests to simulate the hot-rolling process including coiling. The obtained microstructures were characterized using electron backscatter diffraction (EBSD), highlighting the effects of Nb and Mo additions on formation and tempering of the bainitic ferrite microstructures. Further, the evolution of nanometer-sized precipitates was quantified with high-resolution transmission electron microscopy (HR-TEM). The resulting age hardening kinetics have been modelled by combining a phenomenological precipitation strengthening model with a tempering model. Analysis of the model suggests a narrower coiling temperature window to maximize the precipitation strengthening potential in bainite/ferrite high strength low-alloyed (HSLA) steels than that for conventional HSLA steels with polygonal ferrite/pearlite microstructures.

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PIAN, Jin-Xiang, Tian-You CHAI, and Jie-Jia LI. "Rule and Data Driven Strip Coiling Temperature Model in Laminar Cooling Process." Acta Automatica Sinica 38, no. 11 (2012): 1861. http://dx.doi.org/10.3724/sp.j.1004.2012.01861.

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Lee, Sang Ho, Hong Bae Park, and Cheol Jae Park. "Study on LSDC Design for Coiling Shape Control of Hot Strip Mills." Journal of Institute of Control, Robotics and Systems 21, no. 9 (September 1, 2015): 869–74. http://dx.doi.org/10.5302/j.icros.2015.15.0113.

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Choi, Yong-Joon, and Min-Cheol Lee. "A downcoiler simulator for high performance coiling in hot strip mill lines." International Journal of Precision Engineering and Manufacturing 10, no. 2 (April 2009): 53–61. http://dx.doi.org/10.1007/s12541-009-0027-y.

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Pholdee, Nantiwat, Sujin Bureerat, Won-Woong Park, Dong-Kyu Kim, Yong-Taek Im, Hyuck-Cheol Kwon, and Myung-Sik Chun. "Optimization of flatness of strip during coiling process based on evolutionary algorithms." International Journal of Precision Engineering and Manufacturing 16, no. 7 (June 2015): 1493–99. http://dx.doi.org/10.1007/s12541-015-0198-7.

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Radionov, Andrey, Alexander Karandaev, Boris Loginov, and Olga Gasiyarovа. "Conceptual Directions of Creating Digital Twins for Electrotechnical Systems of Rolling Mill Facilities." Известия высших учебных заведений. Электромеханика 64, no. 1 (2021): 54–68. http://dx.doi.org/10.17213/0136-3360-2021-1-54-68.

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This article considers the development of digital twins (DT) for the mechatronic facilities of the coiling machine group in a wide-strip hot rolling mill. The analysis of Russian and foreign sources confirmed that a lot of attention is paid to the economy digitalization. All of the leading metal plant equipment and electrical engineering system manufacturers are working on creating DTs. The analysis of the literature showed that the authors lack a uniform understanding of the conceptual directions in the creation of DTs and there are many definitions of this term. Therefore, the first part of the article deals with the analysis of the digital twin concepts according to their application at industrial companies. The authors substantiate the feasibility of the DT de-velopment for the electromechanical and mechatronic systems of the most complex metal production components, i.e., rolling mills. This initiative development is relevant due to the reconstruction of the 2500 wide-strip hot rolling mill at Magnitogorsk Iron and Steel Works PJSC (MMK PJSC) that involves the installation of unique equipment. Due to this, the development of DTs to implement the virtual commissioning of the equipment becomes a priority. The virtual adjustment of automation and process control systems is also required. This problem can be solved through the example of three coiling machines, each of which has electric and hydraulic auxiliary equipment. These coiling machines are used for rolling the heavy hot-rolled bar and they feature a unique design. Therefore, the development of DTs for mechatronic facilities is a novel scientific problem. The authors propose the methods for the development of DTs used in the virtual commissioning of process control systems. They present the structure of the coiling section automation system and the structure of the DT imple-mented on the basis of programmable logic controllers (PLC). The authors provide the specifications for the Siemens PLCs installed at each of the coiling machines and the coiling machine master controller. To develop the control systems for electric and hydraulic drives, it is recommended to use the Matlab Simulink software package. The authors provide temporal dependencies obtained using DTs and other similar oscillograph charts produced during the operation of the coiling machine that can help model the operation of the mechanisms in question. The results of their comparison show that the processes correspond to each other. Thus, the use of the developed DT to adjust the electrotechnical systems of rolling mills is reasoned. The accepted concept of making digital twins for the electrotechnical systems of rolling mill components is relevant and technically feasible

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Zhang, Lei, Hai Gang Xu, Chao Zhang, and Chao Wei Duan. "Research for Coiling Temperature Control System and Mathematical Model on Hot Strip Mill." Advanced Materials Research 411 (November 2011): 274–78. http://dx.doi.org/10.4028/www.scientific.net/amr.411.274.

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Laminar Cooling is an indispensable part of hot strip steel mill. Based on the devices, instruments and control requirements of 1150mm hot strip steel mill in a certain actual Iron & Steel Co., the laminar cooling control system is designed, including hardware figuration, network framework, software functions, mathematical model, etc. The engineering practice proves that the control system is steady and reliable, and it has the value being popularized in the other similar production line.

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Zhao, Yan Feng, Dian Hua Zhang, Yun Bo Xu, Xiao Ying Hou, and Guo Dong Wang. "A Method of Establishing Temperature Schedule during ASP Hot Strip Rolling." Materials Science Forum 704-705 (December 2011): 1298–303. http://dx.doi.org/10.4028/www.scientific.net/msf.704-705.1298.

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Based on the actual production data of ASP (Angang Strip Production) hot strip rolling line, mechanical properties of thin gauge X70 pipeline steel were simulated by BP neural network method. Recursive functions were used to verify the mechanical properties which calculated by BP neural network. Based on predicted mechanical properties with high precision, BP neural network and Genetic Algorithm (GA) were combined to establish the temperature schedule of X70 pipeline steel during ASP hot strip rolling. It is shown that there are four important temperatures during ASP hot strip rolling, such as rough rolling temperature, refine start rolling temperature, refine finish rolling temperature and coiling temperature. Temperature difference of adjacent stages and temperature of former stage is a linear function relationship. For a given mechanical properties, deviations between simulated temperature and actual temperature are within ±10°C. This method can be used to produce different strips with the same compositions but different strengths by regulating suitable temperature schedule, so it is effective to resolve conflicts during hot strip rolling.

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Weisz-Patrault, Daniel, Alain Ehrlacher, Nicolas Legrand, and Eliette Mathey. "Non-Linear Numerical Simulation of Coiling by Elastic Finite Strain Model." Key Engineering Materials 651-653 (July 2015): 1060–65. http://dx.doi.org/10.4028/www.scientific.net/kem.651-653.1060.

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The coiling process under traction is considered, with an incoming residual stress profile (that can be sufficiently compressive to make the strip buckle): a flatness defect. This paper details a 3D non-linear numerical simulation taking into account the contact of the strip on itself, with a perfect contact law. The model relies on elastic behavior at finite strain because of large rotations. Even though the behavior is elastic, the yield Von Mises criterion is computed and gives information about flatness defects (plastic zones are approximated by zones where the yield stress is exceeded). Furthermore, the paper aims at very short computation times. The modeling strategy relies (for each time step) on two analytical sub-steps. Numerical minimization procedure is used in order apply weak boundary conditions. Results are discussed with respect to a comprehensive Finite Element simulation and good agreement is observed.

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Wang, Hai Fang. "The New Model of Laminar Cooling System and its Fieldbus System." Advanced Materials Research 941-944 (June 2014): 2405–9. http://dx.doi.org/10.4028/www.scientific.net/amr.941-944.2405.

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Hot strip cooling temperature and its cooling rate is get by strip cooling system and coiling temperature of hot rolled strip is an important parameter on its performance index. A clew regarded as the laminar cooling control system is controlled by general linear analytical model. Under detailed analysis of its control system structure, basic theory, analytical method, system design and control method, the structure of the temperature control system is characterized by feed-forward control as the main combined with feed-backward control as the assistant, the configuration software for laminar cooling process is constructed, the mathematics model is present, the characteristic of emerging fieldbus control system is analyzed, and the configuration of fieldbus is brought forward and sketch of distributed structure of laminar cooling control system in a hot rolling mill based on fieldbus and intelligent sensor is presented.

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Pholdee, Nantiwat, and Sujin Bureerat. "Meta-Heuristics for Engineering Optimisation - Applications to Metal Forming Processes." Key Engineering Materials 751 (August 2017): 145–50. http://dx.doi.org/10.4028/www.scientific.net/kem.751.145.

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This paper presents the use of meta-heuristics one of the most popular types of optimisation methods for solving real engineering applications. The general procedure of meta-heuristics is detailed. The applications are related to metal forming processes. Two design examples, optimisation of a strip coiling process and the non-circular wire drawing process, are demonstrated. The results obtained are compared while advantages and disadvantages of using the optimisers are discussed.

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Feng, Yun Li, Xue Jing Qi, and Meng Song. "The Influence of Hot Rolling Technological Parameters on Microstructure of Low Temperature Grain-Oriented Silicon Steel." Advanced Materials Research 396-398 (November 2011): 1841–45. http://dx.doi.org/10.4028/www.scientific.net/amr.396-398.1841.

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The process of hot rolling Fe-3.15% Si steel is simulated by Gleeble-3500 thermal mechanical simulator, the influence of finishing temperature, coiling temperature and cooling rates after rolling on microstructure of Fe-3.15% Si steel are mainly researched, and the influence of hot rolled microstructure on Goss texture, secondary recrystallization and magnetic property are analysed. The results show that the nonuniform microstructures of hot rolled strip play an important role in developing the perfect secondary recrystallization. Fe-3.15% Si steel is rough rolled at 1110°C, finished rolled at 880°C, subsequently cooled to 550°C for coiling at rate of 10°C/s, then air cooled to room temperature. The above mentioned process could produce hot-rolled microstructure which are benefit to formation of Goss texture and the development of perfect secondary recrystallization.

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Yu, Xiang Long, Zheng Yi Jiang, and Quan Yang. "Thermal Deformation Modeling of Post-Rolling Deterioration of Hot Strip Flatness during Forced Cooling of Coils." Advanced Materials Research 145 (October 2010): 111–16. http://dx.doi.org/10.4028/www.scientific.net/amr.145.111.

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Flatness imperfections are observed during uncoiling of the hot rolled strip after forced cooling of coils to ambient temperature. This problem is significant in thin strip as free defect was considered in the process. A mathematical model for heat transfer and thermal deformation analysis during cooling of hot rolled coils is developed to explain the phenomenon of post-rolling flatness deterioration, and predict the occurrence and magnitude of the defects. The numerical simulation results obtained in this work were experimentally validated. It is shown, at a low coiling temperature allowing the phase transformation to reach completion, that the axial distribution of the temperature mainly causes the variation of the local thermal stress, and will promote the flatness deterioration.

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BAI, Zhenhua. "Research on Steel Roll Internal Stress Model in Hot Rolled Strip Coiling Process." Journal of Mechanical Engineering 50, no. 2 (2014): 110. http://dx.doi.org/10.3901/jme.2014.02.110.

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Rauch, Ł., R. Jacolot, K. Bzowski, and M. Pietrzyk. "Physical and numerical simulation of the multipass AHSS strip rolling, cooling and coiling." Procedia Manufacturing 27 (2019): 118–23. http://dx.doi.org/10.1016/j.promfg.2018.12.053.

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