Nonmetallic inclusions in electric furnace steel ShKh15SG-V bars

Gasik, Mikhail; Григорович, К. В.; Panchenko, Alexander; Sal’nikov, A. S.; Shibaev, S. S.; Garber, A. K.; Dalmatov, A. Yu.

doi:10.1134/s0036029511060097

Cited by 2 publications

(3 citation statements)

References 4 publications

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“…Similarly, Kaushik et al [72] reported that Al 2 O 3 and TiN, Al 4 TiO 8 inclusions were observed in FeTi70 alloys. Moreover, Al 2 O 3 and Fe-Ti-Al-O inclusions were found by Gasik et al [73] Kellner et al [20] reported that the inclusions in a FeTi70R alloy consisted of almost pure CaO (96 mass pct), complex oxides having a high CaO content (77 mass pct) and containing 10 mass pct SiO 2 -8 mass pct TiO 2, and complex oxides having a high SiO 2 content (66 mass pct) and containing 21 mass pct CaO-10 mass pct TiO 2 . Moreover, their sizes can reach 260 lm and they have melting points higher than the steel melt temperature.…”

Section: Feti Alloysmentioning

confidence: 75%

“…These results showed a good agreement with Gasik's results. [73] Overall, it can be concluded that pure SiO 2 , Al 2 O 3 and high SiO 2 -containing inclusions are harmful inclusions in FeMo alloys. The high SiO 2 content in these alloys is assumed to relate to their production processes, which should be optimized to decrease the presence of these inclusions.…”

Section: Fecr Alloysmentioning

confidence: 94%

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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: Feti Alloysmentioning

confidence: 75%

Section: Fecr Alloysmentioning

confidence: 94%

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

View full text Add to dashboard Cite

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“…During the alloy dissolution process, the inclusion formation in some local areas having higher concentrations of alloying elements and the motion behavior of existing inclusions from the alloys after the alloy melting are also interesting to know. Previous studies [10][11][12] have reported that many different types of inclusions existed in HCFeCr and LCFeCr alloys. The presence of inclusions is directly related to the ferroalloy production route.…”

Section: Introductionmentioning

confidence: 99%

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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Nonmetallic inclusions in electric furnace steel ShKh15SG-V bars

Cited by 2 publications

References 4 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

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

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