An analytical model for the prediction of the transfer bar temperature in a roughing mill

Kim, J.; Lee, J; Hwang, S.M.

doi:10.1179/030192310x12690127076631

Cited by 4 publications

(4 citation statements)

References 8 publications

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“…Jing and Cai 5 also ignored the mould flux film distribution in the gap and predicted the air gap formation both along shell circumference and casting direction in a billet mould by a finite element model. Kim et al 6 and Han et al 7 studied air gap formation in beam blank and slab moulds by developing finite element models assuming uniform mould flux film of 100 μm in the gap between shell and mould. Recently, Vynnycky 8,9 investigated air gap formation and evolution laws in vertical and round continuous casting moulds with no other heat transfer media in the gap between shell and mould via an asymptotic model.…”

Section: Introductionmentioning

confidence: 99%

Simulation of air gap formation in slab continuous casting mould

Cai

Zhu

2013

Ironmaking & Steelmaking

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A coupled model for describing the air gap formation in a continuous casting mould was developed. In the model, the evolution of the shell and mould temperatures and the gap between them were predicted by a two-dimensional transient thermomechanical coupled finite element model, and the formation of the air gap was described by an interfacial heat transfer model. Based on these, the basic formation characteristics of the air gap in a slab mould during casting of peritectic steel and the influences of varying the casting conditions, such as casting speed, mould taper, molten steel superheat and mould flux solidification temperature on the air gap formation, were described. The results show that the air gap in the mould first forms in the shell corner and mainly concentrates in the regions of 0-20 mm and 0-10 mm from the wide and narrow face corners respectively under typical continuous casting conditions of peritectic steel. The air gap on the shell wide face grows continuously and increases in the low part of the mould, where it mainly forms in the range of 160-450 mm below the meniscus on the shell narrow face. Increasing casting speed reduces the air gap. Increasing mould taper promotes air gap formation on shell wide face but reduces it slightly on the narrow face. Higher steel pouring and mould flux solidifying temperatures result in a wider air gap formation on both the wide and narrow faces.

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Section: Introductionmentioning

confidence: 99%

Simulation of air gap formation in slab continuous casting mould

Cai

Zhu

2013

Ironmaking & Steelmaking

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“…Tensile stress caused by solidification shrinkage could separate grains. Hot tears then take place easily under a small strain, when the liquid film in grain boundaries is thin enough to resist feeding of the surrounding liquid through the grain boundaries [7]. During the solidification of Al-5%Cu-0.8%Mn Advanced Materials Research Vols.…”

Section: Resultsmentioning

confidence: 99%

Effects of Electric Pulse Modification on the Hot Tearing of Al-5%Cu-0.8%Mn Alloy

Wang

Tang

Jian-zhong

et al. 2011

AMR

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It was investigated that the effect of electric pulse modification (EPM) on the hot tearing of Al-5%Cu-0.8%Mn alloy. The results indicate that hot tearing tendency of all samples can be reduced treated by electric pulse with different parameters, moreover, hot tearing stress of alloy with EPM was enhanced 3 times or so than that of samples without treatment. Decreasing the quantity of eutectic in grain boundaries, decreasing the end-solidifying temperature of the alloys, and refining the grains are main causations for increasing hot tearing resistance of Al-5%Cu-0.8%Mn alloy by electric pulse modification.

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“…As a relatively modern technology, there are a few beam blank production lines in China. Moreover, there are more casting defects on and in the as cast beam blanks than other common cast strands 1,2 Therefore, studies of the beam blank quality, determination of the factors causing the defects and optimising the casting technique have great significance to the economy and science.…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional FEM study of fluid flow in mould for beam blank continuous casting: influence of straight through conduit type SEN

Chen

Zhu

et al. 2012

Ironmaking & Steelmaking

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In order to increase the beam blank cleanliness, the aim of this work is to analyse the flow field in the mould of beam blank continuous casting, to find the factors influencing the strand cleanliness and then to optimise the process parameters. A three-dimensional steady finite element model was developed to simulate and analyse the turbulent flow field in the mould. The volume of fluid model was used to track the free surface evolution at the meniscus. The influences of processing parameters, such as casting speed and nozzle parameters, on the molten steel flow in the strand (such as vortex location, liquid steel impact depth, velocity and fluctuation of the liquid steel at free surface) were analysed and the optimum processing parameters determined based on mass calculation. The results of this research project have been applied in actual production, and it has been shown that they are very useful and efficient for improving the steel cleanliness and controlling the surface cracks on the beam blank web.

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An analytical model for the prediction of the transfer bar temperature in a roughing mill

Cited by 4 publications

References 8 publications

Simulation of air gap formation in slab continuous casting mould

Simulation of air gap formation in slab continuous casting mould

Effects of Electric Pulse Modification on the Hot Tearing of Al-5%Cu-0.8%Mn Alloy

Three-dimensional FEM study of fluid flow in mould for beam blank continuous casting: influence of straight through conduit type SEN

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