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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">10.17073/0368-0797-2019-12-950-956</article-id><article-id custom-type="elpub" pub-id-type="custom">blackmet-1784</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>ФИЗИКО-ХИМИЧЕСКИЕ ОСНОВЫ МЕТАЛЛУРГИЧЕСКИХ ПРОЦЕССОВ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>PHYSICO-CHEMICAL BASICS OF METALLURGICAL PROCESSES</subject></subj-group></article-categories><title-group><article-title>Некоторые термодинамические аспекты восстановления Cr2O3 углеродом</article-title><trans-title-group xml:lang="en"><trans-title>Thermodynamic aspects of Cr2O3 reduction by carbon</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>Крюков</surname><given-names>Р. Е.</given-names></name><name name-style="western" xml:lang="en"><surname>Kryukov</surname><given-names>R. E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>к.т.н., доцент кафедры материаловедения, литейного и сварочного производства</p><p>654007, Кемеровская обл., Новокузнецк, ул. Кирова, 42</p></bio><bio xml:lang="en"><p>Cand. Sci. (Eng.), Assist. Professor of the Chair “Materials, Foundry and Welding Production”</p><p>Novokuznetsk, Kemerovo Region</p></bio><email xlink:type="simple">rek_nzrmk@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>Горюшкин</surname><given-names>В. Ф.</given-names></name><name name-style="western" xml:lang="en"><surname>Goryushkin</surname><given-names>V. F.</given-names></name></name-alternatives><bio xml:lang="ru"><p>д.х.н., профессор кафедры естественнонаучных дисциплин им. проф. В.М. Финкеля</p><p>654007, Кемеровская обл., Новокузнецк, ул. Кирова, 42</p></bio><bio xml:lang="en"><p>Dr. Sci. (Chem.), Professor of the Chair of Science named after V.M. Finkel</p><p>Novokuznetsk, Kemerovo Region</p></bio><email xlink:type="simple">koax@sibsiu.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>Бендре</surname><given-names>Ю. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Bendre</surname><given-names>Yu. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>к.х.н., доцент кафедры естественнонаучных дисциплин им. проф. В.М. Финкеля</p><p>654007, Кемеровская обл., Новокузнецк, ул. Кирова, 42</p></bio><bio xml:lang="en"><p>Cand. Sci. (Chem.), Assist. Professor of the Chair of Science named after V.M. Finkel</p><p>Novokuznetsk, Kemerovo Region</p></bio><email xlink:type="simple">bendre@list.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>Бащенко</surname><given-names>Л. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Bashchenko</surname><given-names>L. P.</given-names></name></name-alternatives><bio xml:lang="ru"><p>к.т.н., доцент кафедры теплоэнергетики и экологии</p><p>654007, Кемеровская обл., Новокузнецк, ул. Кирова, 42</p></bio><bio xml:lang="en"><p>Cand. Sci. (Eng.), Assist. Professor of the Chair “Thermal Power and Ecology”</p><p>Novokuznetsk, Kemerovo Region</p></bio><email xlink:type="simple">luda.baschenko@gmail.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>Козырев</surname><given-names>Н. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Kozyrev</surname><given-names>N. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>д.т.н., профессор, заведующий кафедрой материаловедения, литейного и сварочного производства</p><p>654007, Кемеровская обл., Новокузнецк, ул. Кирова, 42</p></bio><bio xml:lang="en"><p>Dr. Sci. (Eng.), Professor, Head of the Chair “Materials, Foundry and Welding Production”</p><p>Novokuznetsk, Kemerovo Region</p></bio><email xlink:type="simple">kozyrev_na@mtsp.sibsiu.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Сибирский государственный индустриальный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Siberian State Industrial University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2019</year></pub-date><pub-date pub-type="epub"><day>14</day><month>01</month><year>2020</year></pub-date><volume>62</volume><issue>12</issue><fpage>950</fpage><lpage>956</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Крюков Р.Е., Горюшкин В.Ф., Бендре Ю.В., Бащенко Л.П., Козырев Н.А., 2020</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="ru">Крюков Р.Е., Горюшкин В.Ф., Бендре Ю.В., Бащенко Л.П., Козырев Н.А.</copyright-holder><copyright-holder xml:lang="en">Kryukov R.E., Goryushkin V.F., Bendre Y.V., Bashchenko L.P., Kozyrev N.A.</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/1784">https://fermet.misis.ru/jour/article/view/1784</self-uri><abstract><p>С целью ресурсосбережения хрома представляет большой практический интерес технология дуговой наплавки порошковой проволокой, в которой в качестве наполнителей используются оксид хрома Cr2O3 и восстановитель – углерод. Проведена термодинамическая оценка вероятности протекания 16 реакций между ними в стандартных условиях и для некоторых реакций в условиях, отличных от стандартных, по табличным термодинамическим данным реагентов в интервале температур 1500 – 3500 К. В качестве стандартных состояний для реагентов рассматривали: Cr(ref) (опорное состояние, температура плавления 2130 К, температура кипения 2952 К), Cr(ж), Cr(г), Cr2O3 (кр, ж), Cr2O3 (ж), С(ref), а в качестве возможных продуктов реакции и стандартных состояний для них CO(г), CO2 (г), Cr 23C6 (кр), Cr7C3 (кр), Cr3C2 (кр). Вероятность протекания реакций оценивали по стандартной энергии Гиббса реакций и по энергии Гиббса реакций, рассчитываемой по уравнению изотермы Вант-Гоффа. Учитывалось растворение хрома в металле наплавочной ванны или вероятные парциальные давления CO и CO2 в газовой фазе, вычисляемые из равновесия реакции газификации углерода. Присутствие в порошковой проволоке для наплавки наряду с оксидом хрома Cr2O3 углерода в качестве восстановителя обязательно приведет к протеканию восстановительных реакций с образованием карбидов хрома, а возможно, и самого хрома. Наиболее вероятно образование карбида состава Cr7C3 (кр). При большем времени нахождения оксида хрома и углерода при температуре выше 2500 К более термодинамически вероятным является процесс образования хрома как компонента наплавочной ванны, а не его карбидов. Оксид хрома имеет наивысшую реакционную способность в состоянии Cr2O3 (ж). Наиболее вероятным является прямое восстановление. В качестве продукта окисления углерода наиболее вероятно образование CO(г). Растворение хрома в металле увеличивает термодинамическую вероятность протекания реакций с его образованием и еще больше понижает вероятность протекания реакций, в которых хром – исходное вещество.</p></abstract><trans-abstract xml:lang="en"><p>In order to save resources of chromium, technology of flux-cored wire surfacing is of great practical interest. In this case Cr2O3 chromium oxide and carbon as a reducing agent are used as fillers. Thermodynamic assessment of probability of 16 reactions between them under standard conditions and for certain reactions under conditions different from standard was carried out using tabulated thermodynamic data of reactants in temperature range of 1500 – 3500 K. The following states were considered as standard states for reactants: Cr(ref) (reference state, melting point 2130 K, boiling point 2952 K), Cr(liq), Cr(gas), Cr2O3 (cr, liq), Cr2O3 (gas), C(ref), and as possible reaction products and standard states for them CO(gas), CO2 (gas), Cr23C6 (сr), Cr7C3 (cr), Cr3C2 (cr). Probability of reactions was estimated using standard Gibbs energy and the Gibbs energy calculated using the Van Goff isotherm equation. Dissolution of chromium in metal of surfacing bath or probable partial pressures of CO and CO2 in gas phase was taken into account and was calculated from equilibrium of carbon gasification reaction. Presence of carbon in flux-cored wire with chromium oxide Cr2O3 as a reducing agent will necessarily lead to occurrence of reduction reactions with generation of chromium carbides, and possibly chromium itself. Generation of Cr7C3 (сr) carbide is likely. With longer life time of chromium oxide and carbon at a temperature above 2500 K, generation of chromium as a component of the surfacing bath is more thermodynamically probable than generation of its carbides. Chromium oxide has the highest reactivity in Cr2O3 (liq) state. Direct reduction is preferential. Generation of CO(gas) as a product of carbon oxidation is more probable. Dissolution of chromium in metal increases thermodynamic probability of reactions with its generation and further reduces probability of reactions in which chromium is the starting material.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>термодинамический анализ</kwd><kwd>энергия Гиббса реакции</kwd><kwd>порошковая проволока</kwd><kwd>оксид хрома</kwd><kwd>углерод</kwd><kwd>дуговая наплавка</kwd><kwd>восстановление</kwd><kwd>хром</kwd><kwd>карбиды хрома</kwd></kwd-group><kwd-group xml:lang="en"><kwd>analysis</kwd><kwd>Gibbs energy of reaction</kwd><kwd>cored wire</kwd><kwd>chromium oxide</kwd><kwd>carbon</kwd><kwd>arc surfacing</kwd><kwd>reduction</kwd><kwd>chromium</kwd><kwd>chromium carbides</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">Козырев Н.А., Бендре Ю.В., Горюшкин В.Ф., Шурупов В.М., Козырева О.Е. 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