Effects of correlative factors on the interdendritic melt flow brought by the bulge in continuous casting slabs

Chen, Shuying; Chang, Guowei; Wang, Jianzhong; Wang, Chun-Jing

doi:10.1016/s1005-8850(08)60077-8

Cited by 4 publications

(3 citation statements)

References 3 publications

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“…Therefore, understanding the mechanism of broadening of slab is extremely important for avoiding broadening of slab and precisely controlling the width of slab in continuous casting. So far, studies about accurately controlling the size of casting slab mainly focus on the phenomenon of bulging [1][2][3][4]. More recently, Siyasiya et al [5] studied the effect of metallurgy parameters on side bulging deformation for stainless steel.…”

Section: Introductionmentioning

confidence: 99%

Mechanism of broadening of slab in continuous casting

Zhang

2011

Sci. China Technol. Sci.

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The mechanism of broadening of slab in continuous casting was studied by numerical simulations and experimental measurements in factories. The mechanism is derived by gradual exclusion of various factors related to the broadening of slab. It is concluded that the slab exposes to no constraint at the direction of narrow face. Because of the static pressure of molten steel, the slab deforms creepily in the direction that consequently results in the broadening of slab. The broadening of slab increases with casting speed and static pressure of molten steel. The decrease of secondary cooling intensity and strength of steel at high temperature also contribute to the broadening of slab. The micro-alloying plays an important role in improving the strength of steel and in reducing the broadening of slab. broadening of slab, continuous casting, secondary cooling zone, thermo-mechanical, viscoelastic-plasticCitation: Nomenclature p: static pressure of molten steel, Pa l: width of slab, m S: thickness of slab shell, 10 2 m q: load force, N : a unitless coefficient D: thickness of slab shell on narrow side, m T So : solidifying temperature of molten steel, K b: roller spacing, m  m : a unitless coefficient W e : deflection, unitless W qe : elastic deflection, unitless : amount of side bulging, 10 3 m T 0 : initial temperature, K  xe : elastic deformation in x direction, unitless  ye : elastic deformation in x direction, unitless  xye : shear deformation in xy plane, unitless  m : convergence coefficient, unitless T(z): function of temperature force field in z dirrection   shear deformation, unitless x, y, z: coordinate dimensions, m T 0 : initial temperature, K : elastic deformation in x direction, unitless T m : average temperature of slab shell, K D s : thickness of slab, m  ye : elastic deformation in x direction, unitless  xye : shear deformation in xy plane, unitless W Te : creeping deflection, unitless t: time, s R i : radius of the ith roller, m S i : thickness of slab shell at the ith roller, 10 2 m  i : deformation of slab at the ith roller, unitless Fu J X, et al.

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Section: Introductionmentioning

confidence: 99%

Mechanism of broadening of slab in continuous casting

Zhang

2011

Sci. China Technol. Sci.

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“…[4], the solute distribution of columnar crystal region for continuous casting slabs was studied by Chang Guowei et al [5] . The author calculated in detail the solute distribution of columnar crystal region for continuous casting slabs [6] . Above results suggested that the solidification process was influenced by the periodical bend of the S/L interface of continuous casting slabs, whereas the research of solidification process when the S/L interface bends periodically was rarely reported.…”

Section: Introductionmentioning

confidence: 99%

Crystal Growth during the Solidification Process of Continuous Casting Slab

Chen

Jin

Yue

et al. 2011

AMR

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Under the condition that the solid-liquid interface bends periodically in continuous casting, the expression of solid-phase growth rate adapting to continuous casting was set up, and then the growth rates were calculated. On this basis, the morphologic of crystal growth and the variation of primary dendrite spacing during continuous casting slabs were studied. The results show that the growth rate is the fastest when solid-phase moves to wave crest within a deformation periodicity, whereas the growth rate is the slowest when the crystal moves to wave hollow. The bigger the bulge size is, the greater the variation amplitude of the growth rate will become. The variation of the growth rate results in the S/L interface to develop towards a planar surface. Because the value is much smaller than the critical value of the transformation from cells to dendrites, and the crystals only grow in the fashion of dendrites. The primary dendrite spacing at wave crest is bigger than the primary dendrite spacing at wave hollow in early stage of columnar crystal growth, and the dendrite spacing at wave crest is basically equal with the dendrite spacing at wave hollow in the late stage of solidification, and they quickly simultaneous increase. Good correlation is obtained between the experimental results and the calculation results of the dendrite arm spacing.

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“…So far, studies about accurately controlling the size of casting slabs are mainly focused on the phenomenon of side bulging [1][2][3][4]. More recently, Siyasiya et al [5] studied the effect of metallurgy parameters on the side bulging deformation for stainless steel.…”

Section: Introductionmentioning

confidence: 99%

Effects of the width and thickness of slabs on broadening in continuous casting

Zhang

2010

Int J Miner Metall Mater

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A 3D viscoelastic-plastic thermal-mechanical coupled finite element model was built on the basis of the secondary development of the commercial software MSC.Marc. Numerical simulations were performed to study slab broadening in the secondary cooling zone. The effects of slab width and thickness on slab broadening were considered. The obtained results reveal that the width broadening is noticeable, and the ratio of ultimate broadening slightly increases with the increase of slab width. This agrees well with the measured data in practice. There is no obvious increase in ultimate broadening when the thickness of slabs increases.

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Effects of correlative factors on the interdendritic melt flow brought by the bulge in continuous casting slabs

Cited by 4 publications

References 3 publications

Mechanism of broadening of slab in continuous casting

Mechanism of broadening of slab in continuous casting

Crystal Growth during the Solidification Process of Continuous Casting Slab

Effects of the width and thickness of slabs on broadening in continuous casting

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