Development of Technology for Microalloying Steel with Boron Using Ferro-Silicon-Boron

Stepanov, A. I.; Бабенко, А. А.; Сычев, А. В.; Жучков, В. И.; Murzin, A. V.; Dresvyankina, L. E.; Ushakov, M. V.

doi:10.1007/s11015-014-9960-9

Cited by 6 publications

(2 citation statements)

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“…The positive influence of boron-containing materials on the physicochemical properties of slags was noted [13]. Improvement of the mechanical properties of low-alloy steel using complex boron-containing ferroalloys has been reported in a number of works [14][15][16][17]. It is shown that complex modification allows to prevent transcrystallization and to crush the microstructure in castings.…”

Section: Introductionmentioning

confidence: 97%

Тhe Study of the Process of Metal-Thermal Reduction of Boron from the Slag of the System CaO-SiO2-MgO-Al2O3-B2O3

Жучков

Salina

Сычев

2019

MSF

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The results of thermodynamic modeling of the effect of aluminum (0.005–0.1%), contained in the metal at constant silicon concentrations (0.2%) and carbon (0.1%) on the boron reduction process from the slag of the system CaO-SiO2-MgO-Al2O3-B2O3 basicity (CaO)/(SiO2) equal to 5 in the temperature range 1400–1700 °C, in steps of 50 °C are presented. For modeling, the software complex HSC Chemistry 6.12 developed by Outokumpu Research Oy (Finland) was used. The calculations using the Equilibrium Compositions module at a gas-phase pressure of 1 atm, containing 2.24 m3 of N2 (gas) as a neutral additive were performed. The obtained simulation results indicate the thermodynamic possibility of boron reduction from the slag of the CaO-SiO2-MgO-Al2O3-B2O3 system by silicon and aluminum, whose concentration in the metal is insignificant – 0.2 and 0.005–0.1%, respectively. It was found that an increase in the initial aluminum content in the steel promotes an increase in the concentration of reduced boron in the metal with a content of 4% B2O3 and a given temperature. Thus, at a process temperature of 1650 °C, an increase in the initial aluminum content from 0.005 to 0.1% made it possible to increase the boron concentration in the metal by 28.5%. The results of thermodynamic modeling characterizing the effect of temperature on the degree of boron reduction at different aluminum contents are presented. Experiments on the inter-phase distribution of boron between the slag of the CaO-SiO2-MgO-Al2O3-B2O3 system and the metal were carried out in a high-temperature Tamman resistance furnace. Low-carbon steel containing 0.005% Al was used. It was shown that aging of the metal under the slag containing 4.3% of B2O3 is accompanied by reduction of boron, the amount of which in the finished steel is 0.0089%. The coefficient of boron assimilation (KB) is 5.8%, which is in principle correlated with the results of thermodynamic modeling. The obtained results of thermodynamic modeling and experimental data showed that it is possible in principle to directly microlite boron steel by reducing it with aluminum and silicon contained in the metal.

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Section: Introductionmentioning

confidence: 97%

Тhe Study of the Process of Metal-Thermal Reduction of Boron from the Slag of the System CaO-SiO2-MgO-Al2O3-B2O3

Жучков

Salina

Сычев

2019

MSF

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“…Абишева (Караганда), ИЭ УрО РАН). Для достижения малых концентраций бора в стали предложено вместо ферробора использовать ферросиликобор, ферросиликомарганецбор, что обеспечивает более высокую степень усвоения бора и более высокое качество металла [70,71].…”

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Fundamental Investigations as the Basis of Creation of New Materials and Technologies in Metallurgy. Part 1

Леонтьев¹,

Григорович²,

Костина³

2016

Izv. vysš. učebn. zaved., Čern. metall.

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Аннотация. Приведен обзор разработанных учеными Российской академии наук новых металлических и керамических материалов и технологий, в том числе новых: высокопрочные коррозионностойкие азотсодержащие стали; жаропрочные и жаростойкие легкие сплавы и композиты на основе интерметаллидов; модификаторы для колесных сталей; комплексные VCr Cr-, Ni-содержащие ферросплавы, антикоррозионные защитные покрытия на основе ультратонких порошков Zn; каталитические нейтрализаторы отработавших газов автотранспорта; магнитотвердые материалы с высокой температурно-временной стабильностью и механическими характеристиками; наноструктурные стенты для эндоваскулярных операций в щадящем режиме; коррозионно-и износостойкие покрытия и способ их плазменного напыления. Разработаны способы: продольной прокатки с макросдвиговой деформацией для улучшения свойств проката; рециклинга замасленной окалины; контроля разгара огнеупорной футеровки в любой точке горна доменной печи, а также методы контроля чистоты рельсовых сталей по включениям. Разработаны процессы и технологии: спецэлектрометаллургии для получения стали для энергетики; синтеза массивных монокристаллических образцов нитридов переходных металлов, нанопорошков W, Pt, Ti и его карбидов и нитридов; переработки лейкоксеновых концентратов Ярегского месторождения; получения титановых имплантатов с пористыми покрытиями; дроби и порошков черных и цветных металлов; ультратонких порошков Zn; рециклинга отходов металлургического производства с извлечением Zn, Sb, Sn, Fe; получения агломерированных нанокристаллических порошков Ta для конденсаторов; переработки сульфидного Mo-содержащего сырья c получением РЗМ, MoO 3 , CaMoO 4 и утилизацией сернистого газа. Созданы инжекционные установки и технологии их применения, высокопроизводительная установка для плазменного напыления металлов, в том числе на лакокрасочные покрытия, пластмассы, картон. Получены данные о термодинамических функциях реакции растворения кислорода в расплавах на основе Fe и реакциях взаимодействия с кислородом растворенных в них элементов (Cr,

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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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Development of Technology for Microalloying Steel with Boron Using Ferro-Silicon-Boron

Cited by 6 publications

References 1 publication

Тhe Study of the Process of Metal-Thermal Reduction of Boron from the Slag of the System CaO-SiO<sub>2</sub>-MgO-Al<sub>2</sub>O<sub>3</sub>-B<sub>2</sub>O<sub>3</sub>

Тhe Study of the Process of Metal-Thermal Reduction of Boron from the Slag of the System CaO-SiO<sub>2</sub>-MgO-Al<sub>2</sub>O<sub>3</sub>-B<sub>2</sub>O<sub>3</sub>

Fundamental Investigations as the Basis of Creation of New Materials and Technologies in Metallurgy. Part 1

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

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