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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">10.17073/0368-0797-2026-4-365-373</article-id><article-id custom-type="elpub" pub-id-type="custom">blackmet-3125</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>Неметаллические включения, микроструктура и механические свойства низкоуглеродистой трубной стали, микролегированной бором</article-title><trans-title-group xml:lang="en"><trans-title>Nonmetallic inclusions, microstructure and mechanical properties of low-carbon boron microalloyed pipe steel</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0734-6162</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Бабенко</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Babenko</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Анатолий Алексеевич Бабенко, д.т.н., профессор, главный научный сотрудник лаборатории стали и ферросплавов</p><p>Россия, 620016, Екатеринбург, ул. Амундсена, 101</p></bio><bio xml:lang="en"><p>Anatolii A. Babenko, Dr. Sci. (Eng.), Prof., Chief Researcher of the Laboratory of Steel and Ferroalloys</p><p>101 Amundsena Str., Yekaterinburg 620016, Russian Federation</p></bio><email xlink:type="simple">babenko251@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6698-5565</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Уполовникова</surname><given-names>А. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Upolovnikova</surname><given-names>A. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Алена Геннадьевна Уполовникова, к.т.н., старший научный сотрудник лаборатории стали и ферросплавов</p><p>Россия, 620016, Екатеринбург, ул. Амундсена, 101</p></bio><bio xml:lang="en"><p>Alena G. Upolovnikova, Cand. Sci. (Eng.), Senior Researcher of the Labo­ratory of Steel and Ferroalloys</p><p>101 Amundsena Str., Yekaterinburg 620016, Russian Federation</p></bio><email xlink:type="simple">upol.ru@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9206-0905</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Сметанников</surname><given-names>А. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Smetannikov</surname><given-names>A. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Артем Николаевич Сметанников, младший научный сотрудник лаборатории стали и ферросплавов</p><p>Россия, 620016, Екатеринбург, ул. Амундсена, 101</p></bio><bio xml:lang="en"><p>Artem N. Smetannikov, Junior Researcher of the Laboratory of Steel and Ferroalloys</p><p>101 Amundsena Str., Yekaterinburg 620016, Russian Federation</p></bio><email xlink:type="simple">artem.smetannikov.89@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт металлургии имени академика Н.А. Ватолина Уральского отделения РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Vatolin Institute of Metallurgy of the Ural Branch of the Russian Academy of Sciences</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>27</day><month>08</month><year>2026</year></pub-date><volume>69</volume><issue>4</issue><fpage>365</fpage><lpage>373</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Бабенко А.А., Уполовникова А.Г., Сметанников А.Н., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Бабенко А.А., Уполовникова А.Г., Сметанников А.Н.</copyright-holder><copyright-holder xml:lang="en">Babenko A.A., Upolovnikova A.G., Smetannikov A.N.</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/3125">https://fermet.misis.ru/jour/article/view/3125</self-uri><abstract><p>В работе представлены результаты исследования влияния бора, марганца и серы в низкоуглеродистой трубной стали на состав и размер неметаллических включений, микроструктуру и механические свойства. Обобщение результатов исследования неметаллических включений в низкоуглеродистой трубной стали, микролегированной бором, позволило выделить в изученных образцах горячекатаного проката три основные группы неметаллических включений: оксидно-сульфидные и оксисульфидные (ОСВ), оксидные, сульфидные включения. В образце проката [B] = 0 % неметаллические включения размером не более 4 мкм представлены в виде единичных включений или сульфидных пленок, а также силикатных включений. Образцы проката с бором характеризуются преимущественно мелкими округлыми неметаллическими включениями: силикатные включения и комплексные включения, состоящие из оксидной фазы системы Al2O3 – MgO в оболочке сульфидов марганца и кальция. При введении бора в количестве 0,006 – 0,011 % происходит изменение структуры с ферритно-перлитной на ферритно-бейнитную, с уменьшением среднего размера ферритного зерна; при 0,011 % В с 8,7 до 6,8 мкм. Микролегирование низкоуглеродистой трубной стали бором в количестве 0,006 – 0,011 %, содержащей 1,4 – 1,6 % Mn и 0,003 – 0,011 % S, за счет преимущественного формирования мелкодисперсной ферритно-бейнитной структуры и неметаллических включений округлой формы размером не более 5,0 мкм, обеспечивает высокие прочностные свойства и, как следствие, получение горячекатаного металлопроката толщиной 10 мм категории прочности Х80 без термической обработки. Наилучшими механическими свойствами, высокой технологичностью и хорошей свариваемостью обладает экономно легированная марганцем трубная сталь, содержащая 0,006 % B, 1,4 % Mn и 0,003 % S, с углеродным эвивалентом Сэкв = 0,30 % при норме не более 0,45 %, коэффициентом трещиностойкости Рсм = 0,17 % при норме не более 0,25 % и соотношением σт /σв = 0,85 при норме не более 0,90.</p></abstract><trans-abstract xml:lang="en"><p>The paper describes the effect of boron, manganese, and sulfur in low-carbon pipe steel on the composition and size of nonmetallic inclusions, microstructure, and mechanical properties. Generalization of the results of the study of nonmetallic inclusions in low-carbon pipe steel microalloyed with boron made it possible to identify three main groups of nonmetallic inclusions in the studied samples of hot-rolled products: oxide-sulfide and oxysulfide, oxide, and sulfide inclusions. In the rolled product sample [B] = 0 %, nonmetallic inclusions of no more than 4 μm in size are represented as single inclusions or sulfide films, as well as silicate inclusions. Samples of rolled products with boron are characte­rized mainly by small rounded nonmetallic inclusions: silicate inclusions and complex inclusions consisting of oxide phase of the Al2O3 – MgO system in a shell of manganese and calcium sulfides. When boron is introduced in an amount of 0.006 – 0.011 %, the structure changes from ferrite-pearlite to ferrite-bainite, with a decrease in the average size of the ferritic grain; at 0.011 %, from 8.7 to 6.8 μm. Microalloying of low–carbon pipe steel with boron in the amount of 0.006 – 0.011 %, containing 1.4 – 1.6 % Mn and 0.003 – 0.011 % S, due to the predominant formation of a finely dispersed ferrite-bainite structure and rounded nonmetallic inclusions of no more than 5.0 μm in size, provides high strength properties and, as a result, the production of hot-rolled metal with a thickness of 10 mm of X80 strength category without heat treatment. Economically manganese alloyed pipe steel containing 0.006 % B, 1.4 % Mn and 0.003 % S has the best mechanical properties, high processability and good weldability, with a carbon equivalent of Сeq = 0.30 % at a rate of not more than 0.45 %, a crack resistance coefficient of Рсм = 0.17 % at a rate of not more than 0.25 % and a ratio of σт /σв = 0.85 at a rate of not more than 0.90.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>низкоуглеродистая трубная сталь</kwd><kwd>бор</kwd><kwd>марганец</kwd><kwd>сера</kwd><kwd>микроструктура</kwd><kwd>неметаллические включения</kwd><kwd>свойства</kwd></kwd-group><kwd-group xml:lang="en"><kwd>low-carbon pipe steel</kwd><kwd>boron</kwd><kwd>manganese</kwd><kwd>sulfur</kwd><kwd>microstructure</kwd><kwd>nonmetallic inclusions</kwd><kwd>properties</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена в рамках исполнения государственного задания ИМЕТ УрО РАН с использованием оборудования Центра коллективного пользования «Урал-М».</funding-statement><funding-statement xml:lang="en">The work was performed according to the state assignment for Vatolin Institute of Metallurgy, UB RAS using the equipment of the Collaborative Usage Center “Composition of Compounds” of the Institute of High Temperature Electrochemistry, UB RAS.</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Арабей А.Б. 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