Interfacial Reaction and Inclusion Formation at Early Stages of FeMnSi Addition to Liquid Fe

Yan, Pengxun; Pandelaers, Lieven; Zheng, Lichun; Blanpain, Bart; Guo, Muxing

doi:10.2355/isijinternational.isijint-2015-084

Cited by 5 publications

(5 citation statements)

References 27 publications

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“…These findings are different from the previous works, [4,7] where they reported that the ''inclusion-free'' zone was formed due to the lower O contents in this zone compared to the bulk Fe at high temperature, which was caused by the consumptions of alloying elements and Fe. However, there was no obvious difference of O concentration between these two areas in this study.…”

Section: Fe-hcfecr Interactionscontrasting

confidence: 99%

“…Previous studies [4,7,[27][28][29] have reported that the number of the formed inclusions increased with an increasing initial O content in the liquid Fe. However, the average inclusion size tended to decrease.…”

Section: Fe-hcfecr Interactionsmentioning

confidence: 84%

“…[5] Several researchers have investigated the early stage dissolution behavior of different ferroalloys. [4,[6][7][8][9] However, not enough attention has been paid to the interfacial processes between FeCr alloys and liquid iron and steel so far. In stainless steelmaking process, comparatively cheap HCFeCr alloys are added initially before decarburization.…”

Section: Introductionmentioning

confidence: 99%

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Interfacial Phenomena and Inclusion Formation Behavior at Early Melting Stages of HCFeCr and LCFeCr Alloys in Liquid Iron

Wang

Karasev

Park

et al. 2021

Metall Mater Trans B

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Chromium is normally added to liquid alloy in the form of different grades of ferrochromium (FeCr) alloys for the requirement of different alloy grades, such as stainless steels, high Cr cast iron, etc.. In this work, inclusions in two commercially produced alloys, i.e., high-carbon ferrochromium (HCFeCr) and low-carbon ferrochromium (LCFeCr) alloys, were investigated. The FeCr alloy/liquid iron interactions at an early stage were investigated by inserting solid alloy piece into contact with the liquid iron for a predetermined time using the liquid-metal-suction method. After quenching these samples, a diffusion zone between the alloys and the liquid Fe was studied based on the microstructural characterizations. It was observed that Cr-O-(Fe) inclusions were formed in the diffusion zone, FeOx inclusions were formed in the bulk Fe, and an “inclusion-free” zone was detected between them. Moreover, it was found that the HCFeCr was slowly dissolved, but LCFeCr alloy was rapidly melted during the experiment. The dissolution and melting behaviors of these two FeCr alloys were compared and the mechanism of the early-stage dissolution process of FeCr alloys in the liquid Fe was proposed.

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Section: Fe-hcfecr Interactionscontrasting

confidence: 99%

Section: Fe-hcfecr Interactionsmentioning

confidence: 84%

Section: Introductionmentioning

confidence: 99%

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Interfacial Phenomena and Inclusion Formation Behavior at Early Melting Stages of HCFeCr and LCFeCr Alloys in Liquid Iron

Wang

Karasev

Park

et al. 2021

Metall Mater Trans B

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“…They reported that the addition of FeTi70 and FeTi35 alloys can introduce Al 2 O 3 and Al-Ti-O inclusions from these alloys to steel. Yan et al 11) studied the dissolution behaviour of FeMnSi alloy. Based on these studies, it can be found that most of them are focused on the dissolu-tion behaviour of alloys which have a lower melting point compared to liquid steel.…”

Section: Interfacial Reactions and Inclusion Formations At An Early Stage Of Fenb Alloy Additions To Molten Ironmentioning

confidence: 99%

Interfacial Reactions and Inclusion Formations at an Early Stage of FeNb Alloy Additions to Molten Iron

et al. 2021

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Nb is an important microalloying element in steelmaking. Its interaction with liquid Fe during an early stage of the alloying process has a considerable influence on the Nb recovery. In the present work, the inclusions in FeNb alloys were characterized using the electrolytic extraction method combined with SEM-EDS. The interfacial reactions between FeNb alloy and liquid Fe, as well as inclusion formations, were studied during an early stage of an alloy addition using a liquid-metal-suction method. The results revealed that a diffusion zone consisting of different regions of Fe-Nb phases was formed and that the thickness of the zone increased with time. Based on the experimental findings, the mechanism of the early dissolution process of FeNb alloys in liquid Fe was discussed. Moreover, the Nb rich regions formed after the alloy contacted with liquid Fe could modify the existing inclusions in the alloy, also their evolution mechanisms were studied. The addition of FeNb alloys can introduce inclusions, such as Al-O and Al-Ti-Nb-O inclusions to the liquid steel. Overall, this study has contributed to the understanding the behaviour of impurities from the FeNb source at the early dissolution process during the microalloying process of steels containing Nb.

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“…Thus, Si–Mn deoxidation was adopted to suppress the formation of Al 2 O 3 ‐rich inclusions. However, a certain amount of Al added ferroalloys during the refining process obviously increased Al 2 O 3 content in inclusions, [ 3–7 ] which was responsible for linear defects on the surface of 304 stainless steel plates. [ 8,9 ] Therefore, the slag modification played an important role to control the composition, size, number, and distribution of inclusions in Si–Mn‐killed 304 stainless steels.…”

Section: Introductionmentioning

confidence: 99%

Effect of Slag Modification on Inclusions in Si–Mn‐Killed 304 Stainless Steels

Yuan

Zhang

Ren

et al. 2020

steel research int.

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Herein, plant trials are conducted to investigate the effect of slag modification on inclusions in Si–Mn‐killed 304 stainless steels. The slag basicity has a significant influence on inclusion compositions in 304 stainless steels. The Al2O3 content in inclusions shows a slight increase tendency with the slag basicity of 1.9. The addition of CaO increases the slag basicity from 1.9 to 2.2, which is beneficial to the removal of inclusions while increasing the Al2O3 content in inclusions from roughly 20% to 40%. The low slag basicity lowers the Al2O3 content in inclusions to around 20% while resulting in a higher total oxygen (TO) at the ladle furnace (LF) end. A kinetic model of slag–steel–inclusion reactions is developed to simulate the effect of slag modification on inclusion composition using FactSage Macro Processing. Evolutions of slag, steel, and inclusions during the slag modification process are well predicted.

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Interfacial Reaction and Inclusion Formation at Early Stages of FeMnSi Addition to Liquid Fe

Cited by 5 publications

References 27 publications

Interfacial Phenomena and Inclusion Formation Behavior at Early Melting Stages of HCFeCr and LCFeCr Alloys in Liquid Iron

Interfacial Phenomena and Inclusion Formation Behavior at Early Melting Stages of HCFeCr and LCFeCr Alloys in Liquid Iron

Interfacial Reactions and Inclusion Formations at an Early Stage of FeNb Alloy Additions to Molten Iron

Effect of Slag Modification on Inclusions in Si–Mn‐Killed 304 Stainless Steels

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