Continuous Casting of Hypo-peritectic Steels: Mould Thermal Monitoring and DSC-analysis

Presoly, Peter; Xia, Guangmin; Reisinger, P.; Bernhard, Christian

doi:10.1007/s00501-014-0306-5

Cited by 16 publications

(15 citation statements)

References 11 publications

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“…[18] Some are presented in Figures 2 through 7, displaying good agreement between the calculations and measurements. [31][32][33][34][35][36][37][38][39][40] Figures 2 and 7 show that increasing the Al and Si alloying contents clearly increases the ferrite stability in Fe-C alloys. This evidently affects both the high-temperature properties of the alloy and its austenite decomposition process at lower temperatures.…”

Section: A Thermodynamic Datamentioning

confidence: 99%

Thermodynamic, Kinetic, and Microstructure Data for Modeling Solidification of Fe-Al-Mn-Si-C Alloys

Miettinen

Koskenniska

Visuri

et al. 2020

Metall Mater Trans B

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In this study, a set of thermodynamic, kinetic, and microstructure data is presented to simulate the non-equilibrium solidification of Fe-Al-Mn-Si-C alloys. The data were further validated with the experimental measurements and then used in a thermodynamic–kinetic software, IDS, to establish the effect of the alloying and cooling rate on the solidification behavior of high-AlMnSi (Al ≥ 0.5 wt pct, Mn ≥ 2 wt pct, Si ≥ 1 wt pct) steels. The modeling results were additionally validated by conducting electron probe microanalysis (EPMA) measurements. The results reveal that (1) solidification in high-AlMnSi steels occurs at much lower temperatures than in carbon steels; (2) increasing the cooling rate marginally lowers the solidus; (3) the microsegregation of Mn in austenite is much stronger than that of Si and Al due to the tendency of Al and Si to deplete from the liquid phase; (4) the residual delta ferrite content may be influenced by a proper heat treatment but not to the extent that could be expected solely from thermodynamic calculations; (5) in high-AlMnSi steels containing less than 0.2 wt pct carbon, the cracking tendency related to the strengthening above the solidus and the shell growth below the solidus may be much lower than in carbon steels.

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Section: A Thermodynamic Datamentioning

confidence: 99%

Thermodynamic, Kinetic, and Microstructure Data for Modeling Solidification of Fe-Al-Mn-Si-C Alloys

Miettinen

Koskenniska

Visuri

et al. 2020

Metall Mater Trans B

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“…Secondary oxidation of steel streams takes place during the continuous casting of steel intended for sections, from the tundish to the moulds without shielding the streams with inert gas. The oxidised surface of the liquid steel, as a result of turbulence in the mould, flows out in the form of 1) Content of metallic aluminium in liquid steel and/or section's material 2) Content of metallic aluminium in the section's material 3) Values proposed on the basis of the analysis of 'peritectic sensitivity' of steel [1] with simultaneous fulfilment of the required carbon equivalent calculated per the following formula: C E = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15 a slag film to the surface, mainly due to the precipitation and outflow of gas bubbles. The bubbles leave a slag film on the surface of the metal, which is crushed in the process of rolling into individual inclusions, containing FeO, MnO, SiO 2 , Al 2 O 3 and AlN, resulting from the treatment of steel with the Al wire in the mould.…”

Section: Methodsmentioning

confidence: 99%

“…Since the beginning of the 1990s, austenite grain refinement was used in order to obtain the required high impact properties in steels without aluminium, by creating acicular ferrite nucleating on small complex oxide inclusions with precipitates on them during solidification in an MnS crystalliser [1][2][3][4]. The effect of acicular ferrite formation is increased by introducing micro-additions of elements such as: Ti, V, Nb, Ce, Zr into the steel, forming very fine oxides or nitrides with lattice constants similar to the lattice constant of MnS precipitating on them [5][6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Optimisation of the Technology of Smelting and Refining of Steel Into Hot Rolled Sections on an Innovative Production Line

Michałowski¹,

KLUSEK²,

DUDKIEWICZ³

et al. 2019

JMM

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“…Während im Zweistoffsystem Fe-C der peritektische Bereich genau bekannt ist, ist der Einfluss von Legierungselementen wie Mn, Si, Al und deren Kombinationen nicht vollständig klar. Daher [10]. Um die Wechselwirkungen der Legierungselemente im höher legierten Fe-C-Si-Mn-Al System systematisch zu untersuchen, wurden von den ternären Fe-C-Si, Fe-C-Mn und Fe-C-Al Systemen sowie partiell von den quaternären Teilsystemen gezielte pseudobinäre Legierungsschnitte untersucht.…”

Section: Einleitung Und Motivationunclassified

Untersuchung der Wirkung von Legierungselementen auf die peritektische Phasenumwandlung in Stählen

Presoly

Bernhard

2015

Berg Huettenmaenn Monatsh

Self Cite

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The behaviour of steels in the continuous casting process depends significantly on the steel composition, the associated phase transitions, and the corresponding thermophysical properties. Particularly "peritectic steels" , where the peritectic phase transformation (L + δ→γ + δ) coincides with the final solidification, are considered as critical and show a lower product quality. While the peritectic range is known exactly in the binary system Fe-C, the influence of alloying elements, such as Mn, Si, Al, and their combinations, are not completely clear. Therefore, the investigation of the effect of alloying elements on the peritectic phase transformation in steels is of particular importance. A practical evaluation of selected laboratory tests shows that the DynamicHeat-Flow-Differential-Scanning-Calorimetry (DSC) and High-Temperature-Laser-Confocal-Microscopy (HT-LSCM) enables a clear identification of peritectic steels. Selected ternary and quaternary Fe-C systems were investigated based on model alloys by means of systematic DSC measurements. The findings on the effect of Al and the interaction of Si with Mn with respect to the Fe-C system represent a new scientific ground.

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Continuous Casting of Hypo-peritectic Steels: Mould Thermal Monitoring and DSC-analysis

Cited by 16 publications

References 11 publications

Thermodynamic, Kinetic, and Microstructure Data for Modeling Solidification of Fe-Al-Mn-Si-C Alloys

Thermodynamic, Kinetic, and Microstructure Data for Modeling Solidification of Fe-Al-Mn-Si-C Alloys

Optimisation of the Technology of Smelting and Refining of Steel Into Hot Rolled Sections on an Innovative Production Line

Untersuchung der Wirkung von Legierungselementen auf die peritektische Phasenumwandlung in Stählen

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