Heat Transfer in Funnel-mould Casting: Effect of Plate Thickness

Santillana, Begoña; Hibbeler, Lance C.; Thomas, Brian G.; Hamoen, Arie; Kamperman, A. A.; Knoop, W. van der

doi:10.2355/isijinternational.48.1380

Cited by 20 publications

(24 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As bottom boundary condition of the 1D temperature field, the time-dependent slab surface temperature ( Figure 2) was used, obtained by a calibrated numerical process model of the industrial continuous caster. [34] During most of the simulation time, the complete solidification interval, and thus the major part of the latent heat release, is located inside the simulation domain (darker rectangular zone in Figure 1). To insure a correct calculation of latent heat outside this domain, an iterative ''homoenthalpic'' approach was used.…”

Section: Simulation Setupmentioning

confidence: 99%

Relationship Between Solidification Microstructure and Hot Cracking Susceptibility for Continuous Casting of Low-Carbon and High-Strength Low-Alloyed Steels: A Phase-Field Study

Böttger

Apel

Santillana

et al. 2013

Metall Mater Trans A

View full text Add to dashboard Cite

Hot cracking is one of the major defects in continuous casting of steels, frequently limiting the productivity. To understand the factors leading to this defect, microstructure formation is simulated for a low-carbon and two high-strength low-alloyed steels. 2D simulation of the initial stage of solidification is performed in a moving slice of the slab using proprietary multiphasefield software and taking into account all elements which are expected to have a relevant effect on the mechanical properties and structure formation during solidification. To account for the correct thermodynamic and kinetic properties of the multicomponent alloy grades, the simulation software is online coupled to commercial thermodynamic and mobility databases. A moving-frame boundary condition allows traveling through the entire solidification history starting from the slab surface, and tracking the morphology changes during growth of the shell. From the simulation results, significant microstructure differences between the steel grades are quantitatively evaluated and correlated with their hot cracking behavior according to the Rappaz-Drezet-Gremaud (RDG) hot cracking criterion. The possible role of the microalloying elements in hot cracking, in particular of traces of Ti, is analyzed. With the assumption that TiN precipitates trigger coalescence of the primary dendrites, quantitative evaluation of the critical strain rates leads to a full agreement with the observed hot cracking behavior.

show abstract

Section: Simulation Setupmentioning

confidence: 99%

Relationship Between Solidification Microstructure and Hot Cracking Susceptibility for Continuous Casting of Low-Carbon and High-Strength Low-Alloyed Steels: A Phase-Field Study

Böttger

Apel

Santillana

et al. 2013

Metall Mater Trans A

View full text Add to dashboard Cite

show abstract

“…Park et al, (2000), Samarasekara andBrimacombe (1979, 1982), and Chow et al, (2002), on the other hand, developed mathematical models for predicting the shape of moulds and the temperature field as a function of operating design variables. Similar investigations (Meng and Thomas, 2003;Park et al, 2002;Santillana et al, 2008) are also available in the literature, and all of these point towards strict control of the mould hot face temperature to avoid distortion and thus produce better quality products. Also, generation of thermal stresses on the mould hot face must be avoided to minimize the distortion and resulting wear.…”

mentioning

confidence: 73%

“…Various developments have improved the efficiency of operation and product quality Liu and Zhu, 2006;Thomas et al, 1997;Thomas, 2001;Park et al, 2000Park et al, , 2002Brimacombe, 1979, 1982;Chow et al, 2002;Meng and Thomas, 2003;Santillana et al, 2008).…”

mentioning

confidence: 99%

“…The objective of this work requires obtaining the thermal profile of the hot face of the mould plate. The presence of cooling channels and the bolt holes requires the heat transfer to be calculated in three dimensions, and so the Fourier equation for threedimensional heat transfer across the plate, along with applicable boundary condition, is applied (Meng and Thomas, 2003;Park et al, 2002;Santillana et al, 2008).…”

mentioning

confidence: 99%

See 1 more Smart Citation

Effect of mould geometry, coating, and plate thickness on the thermal profile of continuous casting moulds

Gupta¹,

Singh²,

Paul³

et al. 2018

J. S. Afr. Inst. Min. Metall.

View full text Add to dashboard Cite

A three-dimensional model for heat transfer analysis of continuous casting mould plate has been developed to predict the hot face temperature. Actual geometry has been considered by incorporating the bolt holes used for fixing bolts to tighten the plate with the backup water box, and the effect of these bolt holes on the hot face temperature of the mould plate is analysed. The high thermal conductivity of copper makes it suitable for use as mould plate material where high heat transfer rates are required. However, copper has poor resistance to abrasion and this disadvantage becomes apparent in the lower part of the mould, where severe wear of the copper surface takes place. To eliminate this problem, high-hardness materials like nickel are coated over the copper surface. This does not affect the heat transfer significantly. The purpose of this study is to investigate the effect of the bolt holes, as well as the nickel coating, on the hot face temperature. continuous casting, heat transfer, mould coating.

show abstract

“…Thomas and Park et al applied a threedimensional finite-element model to predict temperature, thermal distortion, thermal stress and hot face cracks in a funnel shaped mold for casting thin-slab [1,[5][6][7] . Santillana et al applied a one-dimensional finite-element model to modify the 3D model, and predict temperatures for copper plates with different thicknesses [8,9] . Meng and Zhu established a three-dimensional finite-element heattransfer model to predict temperature, distortion and thermal stress of hot copper plates and simulate the effect of casting speed on thermal behavior in a thin-slab continuous casting mold [10] .…”

mentioning

confidence: 99%

Optimization design of wide face water slots for medium-thick slab casting mold

Yin

Zhang

et al. 2016

China Foundry

View full text Add to dashboard Cite

Male, born in 1971, Ph. D, Professor. His main research fields cover the numerical simulation of metal solidification and in-situ observation on grain growth by synchrotron radiation imaging. C ontinuous casting is the most widely used casting method due to its significant superiority in the processing of steels, such as high productivity, good quality and associated savings in capital cost, energy and man power [1,2] . The mold is the most critical component of a continuous casting. It is known that during the continuous casting process, a large amount of sensible and latent heat of molten steel dissipates in the primary cooling zone, thus, a large temperature gradient develops across the copper plates, which causes thermal stresses and distortions [3] . Therefore, the temperature distribution is very important to mold life and the quality of casting slabs. Abstract:A three-dimensional finite-element model has been established to investigate the thermal behavior of the medium-thick slab copper casting mold with different cooling water slot designs. The mold wall temperatures measured using thermocouples buried in different positions of the mold with the original designed cooling system were analyzed to determine the corresponding heat flux profile. This profile was then used for simulation to predict the temperature distribution and the thermal stress distribution of the molds. The predicted temperatures during operation matched the plant measurements. The results showed that the maximum temperature, about 635 K in the wide hot surface, was found about 60 mm below the meniscus and 226 mm from the center of the mold. For the mold with the type I modified design, there was an insignificant decrease in temperature of about 5 K, and for the mold with the type II modified design, the maximum temperature was decreased by about 15 K and the temperature of the hot surface was distributed more uniformly along the length of the mold. The corresponding maximum thermal stress at the hot surface of the mold was reduced from 408 MPa to 386 MPa with the type II modified design. The results indicated that the modified design II is beneficial to the increase of mold life and the quality of casting slabs. Many studies have been carried out to shed light on the thermal behavior of copper molds during the continuous casting process over past years. In order to assess the role of various process parameters impacting mold life, O'Connor and Dantzig developed a finite-element model to calculate the thermo-mechanical state in the mold and casting slab [4] . Thomas and Park et al. applied a threedimensional finite-element model to predict temperature, thermal distortion, thermal stress and hot face cracks in a funnel shaped mold for casting thin-slab [1,[5][6][7] . Santillana et al. applied a one-dimensional finite-element model to modify the 3D model, and predict temperatures for copper plates with different thicknesses [8,9] . Meng and Zhu established a three-dimensional finite-element heattransfer model to predict temperature, disto...

show abstract

Heat Transfer in Funnel-mould Casting: Effect of Plate Thickness

Cited by 20 publications

References 11 publications

Relationship Between Solidification Microstructure and Hot Cracking Susceptibility for Continuous Casting of Low-Carbon and High-Strength Low-Alloyed Steels: A Phase-Field Study

Relationship Between Solidification Microstructure and Hot Cracking Susceptibility for Continuous Casting of Low-Carbon and High-Strength Low-Alloyed Steels: A Phase-Field Study

Effect of mould geometry, coating, and plate thickness on the thermal profile of continuous casting moulds

Optimization design of wide face water slots for medium-thick slab casting mold

Contact Info

Product

Resources

About