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Nosochenko, O. V.; Isaev, O. B.; Lepikhov, L. S.; Degtyarev, P. A.; Kharchevnikov, V. P.; Mel'nik, N. P.; Lyudkovskii, V. M.

doi:10.1023/a:1025685015163

Cited by 13 publications

(25 citation statements)

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“…Generally, the slab quality can be improved by generating a large amount of equiaxed grains and promoting a columnar to equiaxed transition (CET). Recently, an innovative method of feeding a consumable steel strip to the mold has been proposed by the Azovstal' Metallurgical Combine in Ukraine and the Kawasaki Steel Corporation in Japan, which can alleviate the central segregation and porosity defects of CC slab [7][8][9][10]. For the new technology, a thin consumable strip is continuously fed into the CC mold through a strip "feeder" at a desired feeding speed.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Solidification in the Cast Mold with a Consumable Cooler Introduced Inside

Niu

Liu

et al. 2019

Metals

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The microstructure is of great significance for the stability and mechanical performance of the cast slab. Recently, an innovative technology of feeding a consumable cooler into the mold has been proposed to improve the internal quality of castings. But the mechanism is not clear. In the present work, a water-cooled transparent laboratory equipment was set up and solidification of NH4Cl-70%H2O solution was studied to observe the in-situ growth and sedimentation of crystals. The experiments were conducted with and without adding a consumable cooler. Morphology variation of the solidification structure was visualized and temperature distribution during the process was recorded. Results show that introduction of the consumable cooler significantly reduces the temperature of the central zone. Melting of the consumable cooler can supply a large quantity of equiaxed crystals, which prevent the growth of columnar dendrites and thereby promote columnar to equiaxed transition (CET). Moreover, the enhanced convection shows an effect of grain refinement.

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Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Solidification in the Cast Mold with a Consumable Cooler Introduced Inside

Niu

Liu

et al. 2019

Metals

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“…The effect of the amount of additional strip on increasing the ratio of the equiaxed zone was also investigated. Nosochenko et al conducted a comprehensive experimental study on the melting of strip with various carbon content. They concluded that the higher carbon content tends to promote the melting completeness of the strip.…”

Section: Introductionmentioning

confidence: 99%

Melting of Moving Strip during Steel Strip Feeding in Continuous Casting Process

Niu

Liu

et al. 2018

steel research int.

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Steel strip feeding into continuous casting mold is an innovative technology improving the slab quality through decreasing the melt superheat and increasing the proportion of equiaxed dendrites. To investigate the embedded complex melting and solidification processes, a mathematical model has been developed to model all the essential physical behaviors of the fluid flow, heat transfer, melting, and solidification during steel strip feeding into the mold. The enthalpy method is adopted to describe both the melting of steel strip and the solidification of slab. The complex heat transfer between cold steel strip and hot melt is considered. The melting of moving strip and the growth of solidified shell are compared with the experimental measurements and empirical equation, respectively. The validated model is then used to predict the melting and solidification characteristics during steel strip feeding into the mold. Based on the experimental and numerical findings, the whole melting process of steel strip can be divided into three periods: the steel sheath formation, steel sheath melting, and steel strip melting. Effects of the strip thickness (d0), melt superheat (ΔT), and strip feeding speed (va) on the melting of steel strip have been analyzed. An empirical equation is proposed to correlate the total melting time with aforementioned parameters: lntm=3.748+1.406lnd0−0.32lnva−0.794lnΔT. Furthermore, sensitivity study has also performed to reveal the influence of the strip thickness, melt superheat, and strip feeding speed on the final strip tip position.

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“…When the strip narrow side toward the nozzle, it shows a small disturbance to the flow field. Meantime, the steel strip exhibits a faster melting speed, Habu et al [16] 1981 I 0.5-1.0 0.2-1.0 5-15 -Nosochenko et al [17] 2003 III ---Strip composition Isaev [18,24] 2005, 2016 III 1.5-3.0 -5-20 -Li et al [31] 2007 I 5-9 0.1-0.2 10-50 -Li et al [25] 2011 II 3.0-14.6 0.025 10-50 -Xie et al [28] 2018 I -0.055-0.077 -Feeding method Niu et al [29,30,41] 2018, 2019, 2020 I 2.0-4.0 0.1-0.3 10-50 Feeding method Reproduced with permission. [41] Copyright 2018, Springer Nature.…”

Section: Feeding Methods and Multi-physical Field Observationmentioning

confidence: 99%

“…[25] 3) Steel strip feeding into continuous casting mold. [17,18,24] For category I, h is defined to predict the melting behavior of the steel strip. For category II/III, strips were immersed in lowvelocity molten steel/continuous casting mold for a fixed time and then lifting strips to measure the morphology of strips.…”

Section: Parameters Affecting the Feeding Processmentioning

confidence: 99%

“…For the next 40 years, scholars carried out pilot tests and applied this technology in some steelworks. [17][18][19][20][21][22][23][24] They observed that excessive feeding ratio R would deteriorate the inner quality of slabs, and the semi-melting strip is the principal reason for this deterioration. Therefore, parameters affecting the strip melting behavior and R became the research emphasis.…”

Section: Introductionmentioning

confidence: 99%

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