A Thermal Simulation Method for Solidification Process of Steel Slab in Continuous Casting

Zhong, Hao; Chen, Xiangru; Han, Qingyou; Han, Ke; Zhai, Qijie

doi:10.1007/s11663-016-0660-7

Cited by 15 publications

(10 citation statements)

References 23 publications

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“…The experimental study was conducted using home-made thermal simulation equipment for the solidification process [16]. Similar to the solidification process of the continuous casting slab, the solidification process of valve casting can be simplified as a one-dimensional heat transfer process, as the length and width of this casting are considerably larger than its wall thickness (200 mm).…”

Section: Experimental Methodsmentioning

confidence: 99%

“…Based on the heat transfer characteristics of continuous casting, Zhai et al have developed a new approach to investigating the solidification process of the slab by studying the "characteristic solidification unit", which requires only a small number of materials [16,17]. The results show that the microstructure and macro-segregation of the thermal simulated (TS) samples agree well with the actual continuous casting slab [16].…”

Section: Of 13mentioning

confidence: 99%

“…Schematic diagram of the crucible and flipping sample in situ, adapted from[16], with permission from Honggang Zhong, 2019: (a) the steel, which separated from chilled material by Al2O3 porcelain beads, was melted in the crucible; (b) the steel liquid was poured and contacted the chilled material by the crucible flipped 180 degrees in 1 s.…”

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confidence: 99%

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Thermal Simulation Study on the Solidification Structure and Segregation of a Heavy Heat-Resistant Steel Casting

Wang

Zhong

et al. 2019

Metals

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The prediction and controlling of the solidification structure and macro-segregation in heavy steel casting, which is usually produced in limited quantities, was a conundrum in the foundry field. In this work, the cooling and solidification processes of a 16 t CB2 ferritic heat-resistant steel (FHRS) valve casting were reproduced by studying the solidification behavior of three typical units through a thermal simulation method. The results indicate that the types of casting without chilling have the most uneven distribution of solutes and hardness, while those types of casting in which parts are solidified by chilling are much more uniform. The macro-segregation degrees of B, C, Nb, P, Cr, Mo, Si, V and Mn decrease gradually during heavy casting of CB2 ferritic heat-resistant steel. Of them, B, C, Nb, and P are solutes prone to segregation, and the maximum macro-segregation index of B can even reach 15. The macro-segregation tendencies of Cr, Mo, Si, V, and Mn are relatively small. Further studies on the last solidification portion of samples taken by electron microprobe reveal that large-sized precipitates such as MnS and NbxC are easily formed due to solute enrichment, and the sizes of these precipitates were distributed from dozens to hundreds of micrometers.

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Section: Experimental Methodsmentioning

confidence: 99%

Section: Of 13mentioning

confidence: 99%

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Thermal Simulation Study on the Solidification Structure and Segregation of a Heavy Heat-Resistant Steel Casting

Wang

Zhong

et al. 2019

Metals

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“…Interfacial heat transfer between melt and mold has a significant effect on the microstructure and surface quality of steel strip, and the microstructure has a great effect on mechanical properties such as strength and toughness. Zhai [9] developed a flipping pouring apparatus in which molten steel flows into a crucible with a chill copper wall in it. This facility can be used to study heat transfer and solidification of conventional slab cast.…”

Section: Introductionmentioning

confidence: 99%

Simulation of Subrapid Solidification and Secondary Cooling for the Strip Casting of IF Steel

et al. 2021

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A combination of droplet solidification tester and confocal laser scanning microscope was used to simulate subrapid solidification and secondary cooling process pertinent to the strip casting. The IF steel droplet had a delamination structure and the bottom part went through sub-rapid solidification. During secondary cooling, γ/α transformation mechanism belonged to interface-controlled massive transformation and the ferrite grains grew quickly. With the increase of cooling rate, the γ/α transformation temperature decreased and the incubation period and phase transformation duration reduced. The hardness showed a slight increase due to fine-grain strengthening. With coiling temperature increasing from 600 °C to 800 °C, the grain size became larger, precipitates became coarse, and defects in grain were recovered. Consequently, the hardness decreased.

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“…The problem about the scales for simulation is also treated by some of them including the limits of the graphical representation [18][19][20][21]. Some other authors remark the importance of the mushy on the final structure [13,[18][19][20][21][23][24][25][26][27]. The problem of transitions zones is also treated by some authors [21].…”

Section: Introductionmentioning

confidence: 99%

Dynamic formation of primary grain structures on squared steel billets produced by continuous casting (computer simulation)

Ramı́rez-López

Muñoz

Palomar-Pardavé

et al. 2016

Int J Adv Manuf Technol

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The present work is dedicated to explain the development of a computational model for simulating the grain structure formed in a squared billet produced by continuous casting. During steel solidification, three different grain structures are formed as a function of the heat removal conditions. The solidification times previously calculated using a finite difference method were used as input data in order to simulate dynamically the evolution of the grain formation. Computational routines for grouping, counting and classifying have been programmed to evidence the influence of the solidification speed on the grain morphology resulted. Criterions based on solidification speed and time on mushy are used to establish the transitions zones between chill, columnar and equiaxed grains. Routines to simulate grain nucleation and growth based on chaos theory have been included to create a graphical cellular automaton on the computer screen to animate the grain structure formation.

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A Thermal Simulation Method for Solidification Process of Steel Slab in Continuous Casting

Cited by 15 publications

References 23 publications

Thermal Simulation Study on the Solidification Structure and Segregation of a Heavy Heat-Resistant Steel Casting

Thermal Simulation Study on the Solidification Structure and Segregation of a Heavy Heat-Resistant Steel Casting

Simulation of Subrapid Solidification and Secondary Cooling for the Strip Casting of IF Steel

Dynamic formation of primary grain structures on squared steel billets produced by continuous casting (computer simulation)

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