Structure and properties of κ-carbides in duplex lightweight steels

Lu, Wenjun; Zhang, X. F.; Qin, Rongshan

doi:10.1179/1743281215y.0000000007

Cited by 21 publications

(13 citation statements)

References 24 publications

(52 reference statements)

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“…[2][3][4][5][6] Calcium treatment is an effective approach to modify the remaining solid alumina and spinel inclusions to less harmful liquid calcium aluminates or magnesium calcium aluminate inclusions. [7][8][9][10][11][12][13] Ca addition decreases the volume fraction of oxide and sulfide inclusions and controls the composition, morphology, and distribution of those remaining inclusions. Moreover, Ca treatment may modify the shape of MnS stringer inclusions to less elongated MnSÀCaS inclusions.…”

Section: Introductionmentioning

confidence: 99%

Tracking Inclusions during Ladle Refining Using a Kinetic Model for the Compositions of Metal, Slag, and Inclusions

Tabatabaei

Coley

Irons

et al. 2019

steel research int.

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A mathematical kinetic model to predict the trajectory of chemical compositions of the molten steel, slag, and inclusions in the ladle metallurgy furnace was presented in a recent study. The model considered the following chemical processes: 1) the rate of slag–steel reaction; 2) the rate of supply of calcium during calcium treatment; and 3) the rate of steel–inclusion reactions, including oxides and sulfides. Herein, the model is further validated by running the model in varying conditions and comparing the predicted and measured composition of inclusions and dissolved species in the steel for additional plant heats. A sensitivity analysis is also carried out to investigate the effect of different parameters, including sulfur content of steel, total oxygen, slag composition, and reoxidation of steel on the trajectory of composition of inclusions during the ladle process. The model developed by the authors offers potential for control and optimization of the operation of a ladle furnace.

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Section: Introductionmentioning

confidence: 99%

Tracking Inclusions during Ladle Refining Using a Kinetic Model for the Compositions of Metal, Slag, and Inclusions

Tabatabaei

Coley

Irons

et al. 2019

steel research int.

View full text Add to dashboard Cite

show abstract

“…To this purpose two types of ingot with respective chemical compositions of Fe-26Mn-9Al-0.75C and Fe-34Mn-9Al-0.65C (wt.%) were prepared using induction furnace. The microstructure and Vickers hardness of both steels after various annealing processes have been characterized previously [8,14].…”

Section: The Microstructure-formability Relationshipmentioning

confidence: 99%

“…It is noticed that a high Al steel with austenite () matrix possesses better formability than that with ferrite (α) matrix [7]. Mn stabilizes  phase [8] and affects the plastic properties by influence on the specific stacking fault energy [9].…”

Section: Introductionmentioning

confidence: 99%

“…The steels with high Mn low Al and high Mn no Al are found free from , with  matrix and in excellent formability 3 [12][13]. κ-carbide appears when Al composition becomes significant in steel [8,[14][15]. The eutectoid reaction in Fe-Mn-Al-C lightweight steels has been studied systematically [16].…”

Section: Introductionmentioning

confidence: 99%

“…Low Mn constitution however, leads to the formation of α matrix and poor formability [8]. Other cheap and light -stabilizing elements (e.g.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Influence of κ-carbide interface structure on the formability of lightweight steels

Qin

2016

Materials & Design

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Abstractκ-carbide () in high aluminium (Al) steels is grown from austenite () via + or α+ ( represents ferrite), and is a lamellar structure. This work demonstrates that the formability of high Al lightweight steels is affected by the lattice misfit and interface shape between  and matrix. The cold workability can be improved by either to change the steel chemical constitution or to implement an electro-thermo-mechanical process. For ferrite-matrix-based high Al steel, electric-current promotes the spheroidization and refinement of  structure and reduces volume fraction of  phase. This retards the crack nucleation and propagation, and hence improves the materials formability. The observation is caused by a direct effect of electric-current rather than side effects.

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A general perspective of Fe–Mn–Al–C steels

Zambrano

2018

J Mater Sci

172

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During the last years, the scientific and industrial community have focused on the astonishing properties of Fe-Mn-Al-C steels. These high advanced steels allow high-density reductions about ~18% lighter than conventional steels, high corrosion resistance, high strength (ultimate tensile strength (UTS) ~1 Gpa) and at the same time ductility above 60%.The increase of the tensile or yield strength and the ductility at the same time is almost a special feature of this kind of new steels, which makes them so interesting for many applications such as in the automotive, armor and mining industry. The control of these properties depends on a complex relationship between the chemical composition of the steel, the test temperature, the external loads and the processing parameters of the steel. This review has been conceived to tried to elucidate these complex relations and gather the most important aspects of Fe-Mn-Al-C steels developed so far.

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Structure and properties of κ-carbides in duplex lightweight steels

Cited by 21 publications

References 24 publications

Tracking Inclusions during Ladle Refining Using a Kinetic Model for the Compositions of Metal, Slag, and Inclusions

Tracking Inclusions during Ladle Refining Using a Kinetic Model for the Compositions of Metal, Slag, and Inclusions

Influence of κ-carbide interface structure on the formability of lightweight steels

A general perspective of Fe–Mn–Al–C steels

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