Modeling on Dendrite Growth of Medium Carbon Steel during Continuous Casting

Guo, Wenda; Zhang, L.; Zhu, Miaoyong

doi:10.1002/srin.200900117

Cited by 10 publications

(6 citation statements)

References 22 publications

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“…Generally, the SDAS depends on the following factors, the growth rate of crystals, local cooling rate, temperature gradient, chemical components of steel and the local solidification time . As reported earlier, both experimental and theoretical analyses have linked SDAS to a function of cooling rate or solidification time.…”

Section: Resultsmentioning

confidence: 93%

Effect of Dendritic Morphology and Central Segregation of Billet Castings on the Microstructure and Mechanical Property of Hot-Rolled Wire Rods

Yuan

Tang

Peng

et al. 2017

steel research int.

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Microscopic dendritic morphology and central macrosegregation in continuously cast high carbon steel billets with a cross section 150 Â 150 mm 2 are investigated to elucidate their effect on the microstructure and mechanical property of the following hot-rolled wire rods, whose diameters are 10 and 6.5 mm, respectively. Experimental observations and numerical simulations for the steel billets under different casting conditions are carried out. It is found that the secondary dendrite arm spacing (SDAS) in the billets increases with the increase of superheat temperature, while decreases with the increasing specific water flow. Smaller SDAS in the billet center leads to lower segregation index of carbon (r C ) and manganese (r Mn ) due to the low permeability in the final solidification stage. The measured r Mn and r C in billets are in an approximately linear relationship. In addition, for the same rolling and cooling process, the severer carbon segregation in the center of the billets is, the lower the sorbite rate of the rods and the worse stability in the mechanical property of the rods. The tensile strength of wire rods can be improved by adjusting the casting parameters to decrease the SDAS and reduce the central carbon segregation of the billets.

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Section: Resultsmentioning

confidence: 93%

Effect of Dendritic Morphology and Central Segregation of Billet Castings on the Microstructure and Mechanical Property of Hot-Rolled Wire Rods

Yuan

Tang

Peng

et al. 2017

steel research int.

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“…Once the dendrite growth rate is calculated by the current model, the other microstructure parameters, such as secondary dendrite arm spacing, dendrite tip radius, morphology of the microstructure, and so on, can be predicted according to the models developed by the current author Zhang. 26,27) …”

Section: Comparison With Dendrite Growth In Ingot Cast-mentioning

confidence: 99%

A Simple Model to Calculate Dendrite Growth Rate during Steel Continuous Casting Process

Long

Zhang

2010

ISIJ Int.

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“…The secondary dendrite arm spacing (SDAS) is also investigated. Generally, the SDAS is influenced by the following factors, temperature gradient, the growth rate of crystals, local cooling rate, the local solidification time, and chemical components of material [31][32][33][34].…”

Section: Macrostructure and Shrinkage Porositymentioning

confidence: 99%

Experimental investigation on solidification of GCr15 bearing steel by the simulated continuous casting

Jiang

Wang

Zhang

et al. 2018

Ironmaking & Steelmaking

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An experimental apparatus for simulation of continuous casting process of GCr15 bearing steel billet is established. With the apparatus, the billets of diameter 140 mm are casted in various superheats and cooling conditions. The solidification macrostructure, dendrite morphology, segregation and carbide are investigated. It is shown that melting superheats and cooling conditions remarkably influence the microstructure and solute segregation. It is found that the secondary dendrite arm spacing of the steel increases with the increase of the superheat temperature, and with decrease of the cooling rate. Lower superheat with higher cooling rate promotes the refining of the microstructure. Refining equiaxed grains structure in the centre of the billet leads to lower segregation of carbon. Furthermore, with increasing cooling rates, the spacing of the pearlite laminar is refined and the precipitation of proeutectic carbides is suppressed.

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Modeling on Dendrite Growth of Medium Carbon Steel during Continuous Casting

Cited by 10 publications

References 22 publications

Effect of Dendritic Morphology and Central Segregation of Billet Castings on the Microstructure and Mechanical Property of Hot-Rolled Wire Rods

Effect of Dendritic Morphology and Central Segregation of Billet Castings on the Microstructure and Mechanical Property of Hot-Rolled Wire Rods

A Simple Model to Calculate Dendrite Growth Rate during Steel Continuous Casting Process

Experimental investigation on solidification of GCr15 bearing steel by the simulated continuous casting

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