Analysis of the Slab Temperature, Thermal Stresses and Fractures Computed with the Implementation of Local and Average Boundary Conditions in the Secondary Cooling Zones

Hadała, B.; Malinowski, Z.; Telejko, T.

doi:10.1515/amm-2016-0327

Cited by 6 publications

(4 citation statements)

References 11 publications

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“…The authors of papers [10,24,25,[49][50][51][52] apply average values of specific heat in modelling the continuous casting process. It seems to be a good trade-off when no experimental data is available.…”

Section: Material-related Parametersmentioning

confidence: 99%

“…Ensuring a sufficient shell thickness is also related to the appropriate selection of the value of the mould wall taper, which is to compensate for the effect of steel shrinkage and to limit the occurrence of a gaseous gap. Many authors attempt to model effects occurring within the primary cooling zone using both commercial packages such as ANSYS Fluent ® , ProCAST ® and THERCAST ® [3][4][5][6][12][13][14][16][17][18][19][20], and their own original codes based on the FEM [1,2,11,[23][24][25][26]. Numerical modelling of the primary cooling zone also includes an issue related to computing the thermal stress, which combined with a correct fracture criterion may be used for determining the correct mould wall taper in correlation with the casting speed.…”

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confidence: 99%

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Control and Design of the Steel Continuous Casting Process Based on Advanced Numerical Models

Miłkowska-Piszczek

Falkus

2018

Metals

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The process of continuous casting of steel is a complex technological task, including issues related to heat transfer, the steel solidification process, liquid metal flow and phase transitions in the solid state. This involves considerable difficulty in creating the optimal process control system, which would include the influence of all the physico‐chemical phenomena which may occur. In parallel, there is an intensive development of new mathematical models and an increase in computer performance, therefore complex numerical simulations requiring substantial computing time can be conducted. This paper presents a review of currently applied numerical methods allowing the phenomena accompanying the process of continuous casting of steel to be accurately represented. Special attention was paid to the selection of appropriate methods to solve the technological problem selected. The possibilities of applying selected numerical models were analysed in order to modify and improve the existing process or to design a new one linked to the implementation of new steel grades in the current production. The description of the method of defining the boundary conditions, initial conditions and material parameters as vital components ensuring that numerical calculations based upon them in the finite element method, which is that most frequently applied, are correct is an important element of the paper. The possibility of reliably defining the values of boundary parameters on the basis of information on the intensity of cooling in individual zones of the continuous casting machine was analysed.

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Section: Material-related Parametersmentioning

confidence: 99%

mentioning

confidence: 99%

Control and Design of the Steel Continuous Casting Process Based on Advanced Numerical Models

Miłkowska-Piszczek

Falkus

2018

Metals

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“…To the best of our knowledge the FEM models of strip cooling at run-out table based on a local boundary condition have not been developed yet. However, the strand cooling in continuous casting line has been already modeled using a local boundary condition for water spray cooling specified at each spray nozzle [44].…”

Section: V)mentioning

confidence: 99%

Implementation of one and three dimensional models for heat transfer coeffcient identification over the plate cooled by the circular water jets

et al. 2017

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A cooling rate affects the mechanical properties of steel which strongly depend on microstructure evolution processes. The heat transfer boundary condition for the numerical simulation of steel cooling by water jets can be determined from the local one dimensional or from the three dimensional inverse solutions in space and time. In the present study the inconel plate has been heated to about 900°C and then cooled by six circular water jets. The plate temperature has been measured by 30 thermocouples. The heat transfer coefficient and the heat flux distributions at the plate surface have been determined in time and space. The one dimensional solutions have given a local error to the heat transfer coefficient of about 35%. The three dimensional inverse solution has allowed reducing the local error to about 20%. The uncertainty test has confirmed that a better approximation of the heat transfer coefficient distribution over the cooled surface can be obtained even for limited number of thermocouples. In such a case it was necessary to constrain the inverse solution with the interpolated temperature sensors. List of symbols ATDAverage temperature difference between measured and computed temperature curves (°C)

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“…Analysis was done on the thermal resistance, cooling of water, and air-cooling transfer of heat coefficients interconnecting the strip and work-roll. Hadala and Malinowski [37] presented an enhanced heat transfer model. An estimate made at a commercial steel factory validated the concept.…”

Section: Introductionmentioning

confidence: 99%

Thermal stress analysis in hot rolling process

Olajide,

Sobamowo,

Fetuga

et al. 2023

Engineering Today

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In continuous hot slab rolling, it is important to know the temperature distribution within the strip along the length of the rolling mill because the dominant parameter controlling the kinetics of metallurgical transformations and the flow stress of a rolled metal is temperature. A mathematical model based on finite difference method is utilized to predict the temperature distribution and microstructural changes during the continuous hot slab rolling process. The effects of various parameters such as heat of deformation, the work-roll temperature, the rolling speed, and the heat transfer coefficient between the work-roll and the metal were all taken into account in the analysis. From the parametric analysis carried out, it was shown that the temperature in the deformation zone increases as the percentage reduction in the strip thickness and the rolling process, it affects the temperature distribution in the work-roll significantly , the heat generation on the strip-roll interface increases significantly when the percentage reduction in the strip exceeds a certain value. It was also shown that at low rolling speed, the temperature increase is uniform inside the strip and the roll and the maximum temperature of the strip occurs in the neighborhood of the strip centerline region.

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Analysis of the Slab Temperature, Thermal Stresses and Fractures Computed with the Implementation of Local and Average Boundary Conditions in the Secondary Cooling Zones

Cited by 6 publications

References 11 publications

Control and Design of the Steel Continuous Casting Process Based on Advanced Numerical Models

Control and Design of the Steel Continuous Casting Process Based on Advanced Numerical Models

Implementation of one and three dimensional models for heat transfer coeffcient identification over the plate cooled by the circular water jets

Thermal stress analysis in hot rolling process

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