Characteristic Transformation of Manganese-containing Inclusions during Al-killed Process in Ultra-low Carbon Interstitial-free Steel

Wang, Min; Bao, Yanping; Bao, Yanping

doi:10.2355/isijinternational.isijint-2017-682

Cited by 7 publications

(5 citation statements)

References 26 publications

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“…The characteristics of manganese-containing inclusions during the Al-killed process in interstitial-free steels were studied by Wang et al [89] They found that spherical FeOAExMnO inclusions with sizes below 5 lm existed after an MCFeMn alloy addition. However, almost all these FeOAExMnO inclusions were transformed to Al 2 O 3 inclusions after Al was added to the steel melt.…”

Section: Femn Alloysmentioning

confidence: 99%

Non-metallic Inclusions in Different Ferroalloys and Their Effect on the Steel Quality: A Review

Wang

Karasev

Park

et al. 2021

Metall Mater Trans B

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Ferroalloys have become increasingly important due to their indispensable role in steelmaking. In addition, the demand for improved steel qualities has increased considerably, which in turn highlights the quality of ferroalloys. This is due to the fact that the impurities in ferroalloys directly and significantly influence the quality of steel products. To gain a better understanding of the main trace elements and inclusions in ferroalloys (such as FeSi, FeMn, SiMn, FeTi, FeCr, FeMo, FeNb, FeV, FeB, some complex ferroalloys) and their behaviours in steel melt after the additions of these ferroalloys, information from a large number of previous results on this topic was extensively reviewed in this work. The applications of different ferroalloys and their production trends were discussed. In addition, the effects of some trace element impurities from ferroalloys on the inclusion characteristics in steel were also discussed. The possible harmful inclusions in different ferroalloys were identified. Overall, the results showed that the inclusions present in ferroalloys had the following influence on the final steel cleanliness: (1) MnO, MnS and MnO–SiO2–MnS inclusions from FeMn and SiMn alloys have a temporary influence on the steel quality; (2) the effect of large size SiO2 inclusions (up to 200 μm) in FeSi and FeMo alloys on the steel cleanliness is not fully understood. The effect of Al, Ca contents should be considered before the addition of FeSi alloys. In addition, Al2O3 inclusions and relatively high Al content are commonly found in FeTi, FeNb and FeV alloys due to their production process. This information should be paid more attention to when these ferroalloys are added to steel; (3) except for the existing inclusions in these alloys, the Ti-rich, Nb-rich, V-rich carbides and nitrides, which have important effects on the steel properties also should be studied further; and (4) specific alloys containing REM oxides, Cr–C–N, Cr–Mn–O, Al2O3, Al–Ti–O, TiS and Ti(C, N) have not been studied enough to enable a judgement on their influence on the steel cleanliness. Finally, some suggestions were given for further studies for the development of ferroalloy productions.

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Section: Femn Alloysmentioning

confidence: 99%

Non-metallic Inclusions in Different Ferroalloys and Their Effect on the Steel Quality: A Review

Wang

Karasev

Park

et al. 2021

Metall Mater Trans B

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“…In addition, compliance with the rational parameters of the metal at tapping from EAF will reduce the contamination of steel with non-metallic inclusions [11][12][13][14][15][16][17][18], as well as reduce the consumption of aluminum for deoxidation of slag in the LF [19][20][21][22].…”

Section: Improving the Technology Of Steel Deoxidation Grade St 37-3mentioning

confidence: 99%

Improving the Efficiency of Steel De-Oxidation at the Ural Steel

Shapovalov

Dema

Nefed’ev

2020

MSF

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The analysis of the results of steel de-oxidation with manganese and silicon during tapping from an arc furnace in the Ural Steel is carried out. It is shown that the absorption of manganese and silicon during de-oxidation varies widely: from 33.0 to 88.4% (average 68.8%) for manganese and from 25.9 to 79.8% (average 63.8%) for silicon. The main causes of high varies and low absorption of deoxidizing agents were established: low carbon content and high metal overheating before de-oxidation. A statistical analysis of St 37-3 steel de-oxidation data was performed with the aim of improving the efficiency of steel de-oxidation technology in a ladle. The regression equations are obtained, allowing to calculate the assimilation of deoxidizers and the consumption of ferroalloys, depending on the temperature and carbon content in the metal during tapping from the arc furnace.

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“…The similar results were also reported in other dendritic or clustered inclusions, such as Al 2 O 3 oxides. 18,19) That means the quantifications of number and size of MnS inclusions in 2D observation are imprecise sometimes, and so is their influence on the IPF formation. Therefore, it is more meaningful and necessary to investigate the distribution characteristics of MnS inclusions to evaluate their influence on the IPF formation.…”

Section: Effect Of Mns Inclusions Distribution On Intragranular Ferrimentioning

confidence: 99%

Effect of MnS Inclusions Distribution on Intragranular Ferrite Formation in Medium Carbon Non-Quenched and Tempered Steel for Large-Sized Crankshaft

Wang

et al. 2019

ISIJ International

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A novel quantitative characterization method of MnS distribution was proposed based on the data from automatic inclusions analysis software to evaluate their effects on intragranular polygonal ferrite (IPF) formation in medium carbon non-quenched and tempered steels. The results show that agminated MnS inclusions in the steel are less effective to promote the IPF formation and lots of inclusions are actually wasteful because their space distances are too small to act as nucleation sites individually, even their number is larger than that in the steel with plentiful uniformly distributed MnS inclusions. Due to the difference of observation method, three-dimensional dendritic MnS inclusions would be revealed as several agminated small-sized ones in two-dimensional observation. In order to avoid misunderstanding, the characteristics of the nearest space distances between inclusions in widely used two-dimensional observation could be applied to recognize and define these agminated MnS inclusions to more accurately evaluate their effects on IPF formation.

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Characteristic Transformation of Manganese-containing Inclusions during Al-killed Process in Ultra-low Carbon Interstitial-free Steel

Cited by 7 publications

References 26 publications

Non-metallic Inclusions in Different Ferroalloys and Their Effect on the Steel Quality: A Review

Non-metallic Inclusions in Different Ferroalloys and Their Effect on the Steel Quality: A Review

Improving the Efficiency of Steel De-Oxidation at the Ural Steel

Effect of MnS Inclusions Distribution on Intragranular Ferrite Formation in Medium Carbon Non-Quenched and Tempered Steel for Large-Sized Crankshaft

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