Analysis of thermomechanical behaviour in billet casting with different mould corner radii

Park, J. K.; Thomas, Brian G.; Samarasekera, I. V.

doi:10.1179/030192302225004601

Cited by 60 publications

(58 citation statements)

References 21 publications

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“…3) was used which occurred in the listed conditions in Table d 2. Park and Thomas 3) have used FeS tracer to investigate solid shell growth. FeS tracer was suddenly added into the liquid pool during steady state casting.…”

Section: Solidified Shell Thicknessmentioning

confidence: 99%

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A New Semi-analytical Model for Prediction of the Strand Surface Temperature in the Continuous Casting of Steel in the Mold Region

2008

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In this research, a new semi-analytical model is presented for the strand surface temperature in the continuous casting of steel. Firstly with a dimensional analysis approach a general relation between the strand surface temperature and the other effective variables such as conductivity of the steel, pouring temperature, casting velocity, distance from the meniscus, volume rate of cooling water, solidus temperature and heat flux density at the meniscus is deduced. The constants appeared as coefficients or powers of variables in presented relation were computed by a numerical simulation of continuous casting for a breakout bloom. The resulted semi-analytical model for strand surface temperature was extended to predict the solidified shell thickness. The resulted semi-analytical model was validated with comparison to experimental, analytical and numerical results of slab, billet and bloom and good agreement was seen. The new presented model at this research is in versus of controllable parameters and specifications of the mold and it can be used for design of a process control system for continuous casting of slab, billet and bloom.

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Section: Solidified Shell Thicknessmentioning

confidence: 99%

“…[1][2][3] For example Meng et al 2) and Park et al 3) presented an numerical approach and compared their results for the solidified shell thickness of slab and billet with analytical models. Moreover in real time modeling of the continuous casting an analytical model is more applicable.…”

Section: Introductionmentioning

confidence: 99%

A New Semi-analytical Model for Prediction of the Strand Surface Temperature in the Continuous Casting of Steel in the Mold Region

2008

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“…To illustrate the scale of the problem, the values of the heat-transfer coefficients (HTC) for 12 various models describing the heat transfer in a mould were collected in Table 2. 3,[13][14][15][16][17][18][19][20][21][22][23][24][25] Next, calculations with the specified HTC values were performed, maintaining the constant value of the other process parameters. The obtained calculation results are presented in Table 3.…”

Section: Process Parameters (Boundary Conditions)mentioning

confidence: 99%

Developing continuous-casting-process control based on advanced mathematical modelling

Falkus¹,

Miłkowska-Piszczek²

2015

Mater. Tehnol.

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The method of continuous casting of steel -due to its ability to maximize the yield of liquid steel, along with substantially reducing the energy consumption of the production process -has become the fundamental method for obtaining steel semi-products. Nowadays, over 90 % of the global steel is cast with the continuous method. In recent years the ability to numerically model metallurgical processes -including the continuous process of steel casting -has been very important for creating new technologies, along with modifying those that already exist. The mathematical modelling of solidification processes with numerical methods allowed a full comprehensive reconstruction of the complex physical and chemical nature of the solidification processes. However, having to formulate a numerical model of the continuous-casting process is an extremely complex task because the requirements stipulate that a correct set of material parameters, along with the process data, have to be implemented. As regards the formulation of a mathematical model of the steel continuous-casting process, a comprehensive description of the heat transfer during the continuous casting is an important item. The complexity of this issue requires that conscious simplifications are made when formulating mathematical models for the calculation of the cast-strand solidification process. The number and type of the simplifications -which are necessary in this case -are the keys to the correctness of the results obtained, and they also influence the scope and accuracy when it comes to verifying the model. It is crucial to define the problem on the basis of the finite-element theory, and the elimination of numerical errors is obviously a necessary condition to ensure the correctness of the analysis performed. This paper contains a description of a number of solutions that are based on the finite-element method (FEM) for the models using the Euler, Lagrange and MiLE meshes. All the model concepts are illustrated with the examples of the calculations that were completed using the actual industrial data, along with the properties of the materials as determined by laboratory tests. The pivot of the considerations conducted is related to the verification of the correctness of the calculations, together with the sensitivity analysis of individual model types. The conclusions present an assessment of the progress of the current numerical models of the continuous-casting process, along with the directions for their further development. Keywords: continuous casting, mathematical modelling, solidification, process control Metoda kontinuirnega ulivanja jekla je postala osnovna metoda za pridobivanje jeklenih polproizvodov zaradi mo`nosti maksimalnega izkoristka staljenega jekla ter zmanj{anja porabe energije za proizvodni proces. Danes je okrog 90 % svetovne proizvodnje jekla ulitega z metodo kontinuirnega ulivanja. V preteklih letih je bila mo`nost modeliranja postopka ulivanja jekla zelo pomembna pri nastajanju novih tehnologij vklju~no z modificiranjem`e obstoje~ih...

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“…Modelling of the temperature distribution in the process of cast strand solidification has been analysed by several authors. The commercial software and own developed numerical formulations have been applied [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. The correct implementation of the boundary conditions of heat transfer is an important factor in obtaining the correct computer simulation with the finite element method.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Four Models of Radiative Heat Transfer Between Flat Surface to Evaluate the Temperature Field Based on Example of the Continuous Casting Mould

Rywotycki¹,

Malinowski²,

Miłkowska-Piszczek³

et al. 2015

Archives of Metallurgy and Materials

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The paper presents the results of research concerning the influence of radiative heat transfer on the strand and mould interface. The four models for determining the heat transfer boundary conditions within the primary cooling zone for the continuous casting process of steel have been presented. A cast slab -with dimensions of 1280×220 mm -has been analysed. Models describing the heat transfer by radiation have been specified and applied in the numerical calculations. The problem has been solved by applying the finite element method and the self-developed software. The simulation results, along with their analysis, have been presented. The developed models have been verified based on the data obtained from the measurements at the industrial facility.Keywords: continuous casting of steel, heat transfer coefficient, numerical models W pracy przedstawiono wyniki badań dotyczących wpływu radiacyjnej wymiany ciepła z zastosowaniem różnych modeli do wyznaczenia warunków brzegowych dla procesu ciągłego odlewania stali w obszarze strefy pierwotnego chłodzenia. Analizie poddano wlewek płaski o wymiarach 1280×220 mm. W obliczeniach wykorzystano wybrane zależności opisujące wymianę ciepła przez promieniowanie. Przedstawiono wyniki symulacji oraz ich analizę. Zaprezentowane modele zweryfikowano na podstawie przemysłowej bazy danych. Zadanie zostało rozwiązane metodą elementów skończonych z zastosowaniem autorskiego pakietu numerycznego.

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Analysis of thermomechanical behaviour in billet casting with different mould corner radii

Abstract: Institute of Materials, Minerals and Miningoccur in the absence of rhomboidity, as a result of improper corner radius 1 2 , 1 8 or mould distortion and wear. 1 4 ,1 5 Aketa and Ushijima 1 8 observed that with a large corner radius, the longitudinal corner cracks appear along the corner,

Cited by 60 publications

References 21 publications

A New Semi-analytical Model for Prediction of the Strand Surface Temperature in the Continuous Casting of Steel in the Mold Region

A New Semi-analytical Model for Prediction of the Strand Surface Temperature in the Continuous Casting of Steel in the Mold Region

Developing continuous-casting-process control based on advanced mathematical modelling

Comparison of Four Models of Radiative Heat Transfer Between Flat Surface to Evaluate the Temperature Field Based on Example of the Continuous Casting Mould

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