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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">blackmet</journal-id><journal-title-group><journal-title xml:lang="ru">Известия высших учебных заведений. Черная Металлургия</journal-title><trans-title-group xml:lang="en"><trans-title>Izvestiya. Ferrous Metallurgy</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0368-0797</issn><issn pub-type="epub">2410-2091</issn><publisher><publisher-name>National University of Science and Technology "MISIS"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.17073/0368-0797-2018-12-948-956</article-id><article-id custom-type="elpub" pub-id-type="custom">blackmet-1518</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>МЕТАЛЛУРГИЧЕСКИЕ ТЕХНОЛОГИИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>METALLURGICAL TECHNOLOGIES</subject></subj-group></article-categories><title-group><article-title>ИССЛЕДОВАНИЕ СТЕПЕНИ ОКИСЛЕНИЯ ХРОМА В ОКСИДНО-ФТОРИДНЫХ ШЛАКАХ, ПРИМЕНЯЕМЫХ ПРИ ЭЛЕКТРОШЛАКОВОМ ПЕРЕПЛАВЕ</article-title><trans-title-group xml:lang="en"><trans-title>STUDY OF THE OXIDATION DEGREE OF CHROMIUM IN OXIDE-FLUORIDE SLAGS FOR ESR</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Левков</surname><given-names>Л. Я.</given-names></name><name name-style="western" xml:lang="en"><surname>Levkov</surname><given-names>L. Ya.</given-names></name></name-alternatives><bio xml:lang="ru"><p>д.т.н., заведующий лабораторией спецэлектрометаллургии</p><p>115088, Россия, Москва, ул. Шарикоподшипниковская, 4</p></bio><bio xml:lang="en"><p>Dr. Sci. (Eng.), Head of the Laboratory of Special Elect­ rometallurgy</p><p>Moscow</p></bio><email xlink:type="simple">LYLevkov@cniitmash.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Шурыгин</surname><given-names>Д. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Shurygin</surname><given-names>D. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>к.т.н., ведущий научный сотрудник</p><p>115088, Россия, Москва, ул. Шарикоподшипниковская, 4</p></bio><bio xml:lang="en"><p>Cand. Sci. (Eng.), Leading Researcher</p><p>Moscow</p></bio><email xlink:type="simple">shurygind5@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Дуб</surname><given-names>В. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Dub</surname><given-names>V. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>д.т.н., профессор, научный руководитель ИМиМ</p><p>115088, Россия, Москва, ул. Шарикоподшипниковская, 4</p></bio><bio xml:lang="en"><p>Dr. Sci. (Eng.), Professor, Scientific Director of the Institute of Metallurgy and Mechanical Engineering</p><p>Moscow</p></bio><email xlink:type="simple">oms@cniitmash.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Клочай</surname><given-names>В. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Klochai</surname><given-names>V. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>к.т.н., председатель Совета директоров</p><p>607010, Россия, Нижегородская обл., г. Кулебаки, ул. Восстания, 1</p></bio><bio xml:lang="en"><p>Cand. Sci. (Eng.), Chairman of Board of Directors</p><p>Kulebaki, Nizhny Novgorod Region</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Корзун</surname><given-names>Е. Л.</given-names></name><name name-style="western" xml:lang="en"><surname>Korzun</surname><given-names>E. L.</given-names></name></name-alternatives><bio xml:lang="ru"><p>к.т.н., доцент, начальник отдела НИОКР</p><p>607010, Россия, Нижегородская обл., г. Кулебаки, ул. Восстания, 1</p></bio><bio xml:lang="en"><p>Cand. Sci. (Eng.), Assist. Professor, Head of R &amp; D Department</p><p>Kulebaki, Nizhny Novgorod Region</p></bio><email xlink:type="simple">e.korzun@ruspolymet.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>АО «НПО «ЦНИИТМАШ»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>JSC Russian State Research Center “RPA “CNIITMASH”</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>ПАО «Русполимет»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>JSC “Ruspolimet”</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2018</year></pub-date><pub-date pub-type="epub"><day>15</day><month>01</month><year>2019</year></pub-date><volume>61</volume><issue>12</issue><fpage>948</fpage><lpage>956</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Левков Л.Я., Шурыгин Д.А., Дуб В.С., Клочай В.В., Корзун Е.Л., 2019</copyright-statement><copyright-year>2019</copyright-year><copyright-holder xml:lang="ru">Левков Л.Я., Шурыгин Д.А., Дуб В.С., Клочай В.В., Корзун Е.Л.</copyright-holder><copyright-holder xml:lang="en">Levkov L.Y., Shurygin D.A., Dub V.S., Klochai V.V., Korzun E.L.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://fermet.misis.ru/jour/article/view/1518">https://fermet.misis.ru/jour/article/view/1518</self-uri><abstract><p>Заготовки  из  высокохромистых  сталей,  обладающих  комплексом  необходимых  механических  и  коррозионных  свойств,  широко  применяются  при  производстве  ответственных  изделий  тяжелого  и  энергетического  машиностроения.  Одной  из  наиболее  эффективных  технологий, получивших широкое распространение при изготовлении таких заготовок, является электрошлаковый переплав (ЭШП). Такой  переплав, включенный в производственную технологическую цепочку, позволяет за счет управления процессами рафинирования и затвердевания обеспечить высокую однородность металлургических характеристик (химический состав, структуру, неметаллические включения  и т.д.) металла и, в итоге, комплекс механических свойств изделия. Выбор шлака, поддержание на оптимальном уровне его окислительновосстановительного  потенциала  является  предпосылкой  эффективного  рафинирования  высокохромистых  сталей  при  ЭШП,  поскольку  хром и другие элементы, присутствующие в шлаке в различных степенях окисления, участвуют в транспорте кислорода из газовой фазы  в жидкий металл. С позиций теории электронного строения шлаковых систем оценено влияние окисленности шлака (равновесного парциального давления кислорода РO2 ) на степень окисления хрома в широко используемых в России шлаках типа АНФ-1, АНФ-6 и АНФ-29.  Установлены зависимости соотношения концентраций Cr+3/Сr+2 от температуры, окисленности и оптической основности шлака. Представлена термодинамическая модель изменения степени окисления хрома в шлаке в зависимости от его окисленности. Выполнено сравнение  расчетных  результатов  с  экспериментальными  данными  для  шлаковых  систем  при  температуре  1873 К.  Показано,  что  средняя  степень  окисления  хрома  уменьшается  с  ростом  температуры,  понижением  парциального  давления  кислорода  и  оптической  основности  шлака.  Показано, что присутствие фтора в шлаке влияет на изменение соотношения Cr+3/Сr+2. Продемонстрировано, что с понижением парциального давления кислорода от 10–4 до 10–12 Па при температуре 1873 К средняя величина степени окисления хрома во фторидно-оксидных  шлаках уменьшается от +3 до +2. Предложена зависимость, позволяющая оценить соотношение Cr+3/Сr+2 во фторидно-оксидных шлаках,  учитывающая температуру и окисленность шлака.</p></abstract><trans-abstract xml:lang="en"><p>Billets from high-chromium steels possessing the necessary complex of mechanical and corrosion properties are widely used in the manufacture of critical products of heavy and power engineering. One of the effective technologies widely used in the manufacture of such work-pieces is electroslag remelting (ESR). ESR, included in the production process chain, for the management of refining and solidification processes allows to ensure a high homogeneity of metallurgical characteristics (chemical composition, structure, non-metallic inclusions, etc.) of the metal and, as a result, the complex of mechanical properties of the product. The choice of slag, maintaining its optimum oxidation-reduction potential at an optimum level, is a prerequisite for the effective refining of high-chromium steels at the ESR, since chromium and other elements present in the slag in various oxidation degree participate in the transport of oxygen from the gas phase to the liquid metal. From standpoint of the theory of electronic structure of slag systems, the effect of slag oxidation (equilibrium partial pressure of oxygen РO2 ) on the oxidation degree of chromium has been studied for widely used slags in Russia such as ANF-1, ANF-6, and ANF-29. Dependence of the ratio of Cr+3/Cr+2 concentrations on the temperature, oxidation level and optical slag basicity is established. A thermodynamic model of changing the oxidation state of chromium in slag depending on its oxidation is presented. The calculated results are compared with the experimental data for slag systems at a temperature of 1873 K. It is shown that the average oxidation degree of chromium decreases with increasing temperature, decreasing of the oxygen partial pressure and the optical slag basicity. The presence of fluorine in the slag affects the varia- tion ratio Cr+3/Cr+2. It is shown that with decrease in the oxygen partial pressure from 10-4 to 10-12Pa at a temperature of 1873 K, the average value of chromium oxidation degree in fluoride-oxide slags decreases from +3 to +2. A correlation is proposed, which makes it possible to estimate the Cr+3/Cr+2 ratio in fluoride-oxide slags, taking into account the temperature and oxidation of slag.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>степень окисления</kwd><kwd>парциальное давление кислорода</kwd><kwd>электрошлаковый переплав</kwd><kwd>оптическая основность шлака</kwd><kwd>электроотрицательность</kwd></kwd-group><kwd-group xml:lang="en"><kwd>oxidation  degree</kwd><kwd>partial  oxygen  pressure</kwd><kwd>electroslag  remelt- ing</kwd><kwd>optical slag basicity</kwd><kwd>electronegativity</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Kern T.-U., Scarlin B., Zeiler G. etс. 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