Study on Solidification Behaviour, Solute Segregation and Fluid Flow in Continuously Cast Slab

Kumai, K.; Asano, Kōichi; Ohashi, Tetsuro; Nomura, Etsuo; Fujii, Hironobu

doi:10.2355/tetsutohagane1955.60.7_894

Cited by 18 publications

(15 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Consequently, the fluid flow due to solidification shrinkage is superimposed. The right diagram in figure 5 shows the velocity field Yz/Yx~\.0 (for results given in figure 5 to 8) The horizontal component due to solidification shrinkage, however, is small. Hence, the horizontal flow component is essentially that due to bulging.…”

Section: Resultsmentioning

confidence: 98%

“…where Kx and K, are the permeabilities in x and z direction, respectively. According to experimental data") to 34) K, and K, can be expressed as (8) Incorporating equation (8) into (3) and using (1) yields equation…”

Section: The Equationmentioning

confidence: 99%

“…Equation (9) is applied together with the equations describing the temperature field and the fluid flow velocities to determine CL(i) and gs in each volume element of the mushy interior ofthe slab. If CL (i) is known as a function ofx and z, the horizontal concentration profile existing in the solid atthe end ofsolidification isobtained by integration of equation (8). The integration is unnecessary for elements with m (i) = 1 which do not show microsegregation, since cs(i) = k(i) CL (i).…”

Section: The Equationmentioning

confidence: 99%

See 2 more Smart Citations

Macrosegregation in continuously cast steel slabs: preliminary theoretical investigation on the effect of steady state bulging

Miyazawa

Schwerdtfeger

1981

Steel Research Intl

View full text Add to dashboard Cite

show abstract

Section: Resultsmentioning

confidence: 98%

Section: The Equationmentioning

confidence: 99%

Section: The Equationmentioning

confidence: 99%

See 1 more Smart Citation

Macrosegregation in continuously cast steel slabs: preliminary theoretical investigation on the effect of steady state bulging

Miyazawa

Schwerdtfeger

1981

Steel Research Intl

View full text Add to dashboard Cite

show abstract

“…(38) and (4) one obtains the following b exp {'(l e +2b) 1 Ac[ (1 +b) where Ec is given by Eqs. (25), (26) and (42) Substituting this solution into Eq. (36) yields the E11…”

Section: Appendix Estimation Of the Interdzfusion Coefficients Using mentioning

confidence: 99%

Mathematical analysis of solidification behaviour of multicomponent alloys.

Fujimura

Brimacombe

1986

ISIJ Int.

View full text Add to dashboard Cite

SynopsisA mathematical model of dendrite solidification in multi-component alloys has been developed to predict microsegregation and to obtain a better understanding of the relation between the solid fraction and temperature in the solid/liquid zone. An analytical solution to the solute-and heatbalance equations in the model has been obtained by assuming that equilibrium exists at the solid/liquid interface and that the solidus and liquidus move in proportion to the square root of time.Effective partition ratios predicted by the model for the continuous casting of steel are in good agreement with generally accepted values. Model predictions of temperature distribution in the mushy zone fit well with measured temperatures. However predictions of micro-segregation of Cr and Ni in a unidirectionally solidified stainless steel were less satisfactory, presumably because the model neglects segregation between adjacent secondary dendrite arms. The model also has provided a theoretical basis for the relationship between temperature and solid fraction in the mushy zone. It is possible to assume a linear relationship between temperature and solid fraction in cases, like plain-carbon steel, where one of the solutes has a dominant effect on depression of the liquidus temperature with respect to its concentration. This assumption simplifies the computation of solidification behaviour without introducing severe errors.

show abstract

“…[3][4][5] For preventing bulging, such as shortened roll pitches using rolls of smaller diameter, intensified secondary cooling, and maintained roll alignment have been considered and performed. [6][7][8][9][10] Fluid flow of liquid steel by solidification shrinkage is occurred because the liquid steel among dendrites is sucked out by shrinkage during solidification. The effects of this fluid flow on segregation have been variously discussed.…”

Section: Introductionmentioning

confidence: 99%

Simulation of the Center-Line Segregation Generated by the Formation of Bridging

et al. 2014

View full text Add to dashboard Cite

The macrosegregation model that heat transfer, solidification, liquid flow and solute movement were considered was developed to simulate the generation of the center-line segregation in the casting of steel. The classical model which considers only the liquid flow caused by solidification shrinkage leads the negative segregation which contradicts the fact. In order to explain the contradiction, the bulging of the cast slab has been claimed to be important factor to form the positive segregation at the center of the cast. However, some experimental data show that the bulging has not been necessarily formed during the generation of center-line segregation. In this case, the bridging with the solidification shrinkage has been found to be formed instead of the bulging. In this paper, the macrosegregation model is developed considering, thus, three driving forces of fluid flow; solute concentration, thermal expansion and solidification shrinkage. This simulation results show that the primary driving force which results in the center-line segregation is the solidification shrinkage with the bridge. In addition to that, the mechanism of generating the center-line segregation is discussed based on the simulation results.

show abstract

Study on Solidification Behaviour, Solute Segregation and Fluid Flow in Continuously Cast Slab

Cited by 18 publications

References 2 publications

Macrosegregation in continuously cast steel slabs: preliminary theoretical investigation on the effect of steady state bulging

Macrosegregation in continuously cast steel slabs: preliminary theoretical investigation on the effect of steady state bulging

Mathematical analysis of solidification behaviour of multicomponent alloys.

Simulation of the Center-Line Segregation Generated by the Formation of Bridging

Contact Info

Product

Resources

About