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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">10.17073/0368-0797-2022-1-21-27</article-id><article-id custom-type="elpub" pub-id-type="custom">blackmet-2233</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 изгиба толстолистового проката с градиентом прочностных свойств по толщине</article-title><trans-title-group xml:lang="en"><trans-title>Study of bending of plate steel with a through-the-thickness gradient of strength properties</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-7763-5130</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Максимов</surname><given-names>А. Б.</given-names></name><name name-style="western" xml:lang="en"><surname>Maksimov</surname><given-names>A. B</given-names></name></name-alternatives><bio xml:lang="ru"><p>Александр Борисович Максимов, к.т.н., доцент кафедры «Машины и аппараты пищевых производств»</p><p>298309, Крым, Керчь, ул. Орджоникидзе, 82</p></bio><bio xml:lang="en"><p>Aleksandr B. Maksimov, Cand. Sci. (Eng.), Assist. Prof. of the Chair “Machines and Devices of Food Production”</p><p>82 Ordzhonikidze Str., Kerch, Crimea 298309</p></bio><email xlink:type="simple">aleksandrmks@yandex.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/0000-0003-4978-6238</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Пронина</surname><given-names>Ю. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Pronina</surname><given-names>Yu. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Юлия Григорьевна Пронина, д.ф.-м.н., профессор, заведующий кафедрой вычислительных методов механики деформируемого тела</p><p>Санкт-Петербург, Университетская наб., 7-9</p></bio><bio xml:lang="en"><p>Yuliya G. Pronina, Dr. Sci. (Phys.–Math.), Prof., Head of the Chair of Computational Methods of Deformable Body Mechanics</p><p>7-9 Universitetskaya Quay, St. Petersburg 199034</p></bio><email xlink:type="simple">y.pronina@spbu.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Керченский государственный морской технологический университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Kerch State Marine Technical University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Санкт-Петербургский государственный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Saint Petersburg State University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>11</day><month>02</month><year>2022</year></pub-date><volume>65</volume><issue>1</issue><fpage>21</fpage><lpage>27</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Максимов А.Б., Пронина Ю.Г., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Максимов А.Б., Пронина Ю.Г.</copyright-holder><copyright-holder xml:lang="en">Maksimov A.B., Pronina Y.G.</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/2233">https://fermet.misis.ru/jour/article/view/2233</self-uri><abstract><p>В работе исследуется изгиб пластины из толстолистовой судовой стали А32 с градиентом прочностных свойств по толщине. Градиент свойств достигался односторонним ускоренным охлаждением пластины из аустенитной области. Вследствие этого по толщине пластины формировался спектр микроструктур: от феррито-бейнитной на ускоренно охлаждаемой поверхности до феррито-перлитной на другой. При малом упругопластическом изгибе стальной пластины с однородной микроструктурой нейтральная плоскость деформации смещается в область сжатия, что объясняется большим сопротивлением материала сжатию, чем растяжению. Исследований смещения нейтральной плоскости при изгибе стальных пластин с градиентом прочности по толщине и SD-эффектом (различными пределами текучести на растяжение и сжатие) в литературе не найдено. Цель настоящей работы заключалась в разработке математической модели пластического изгиба стальной пластины с SD-эффектом и градиентом прочности по толщине при конечных прогибах для подтверждения целесообразности одностороннего термического армирования листового проката. Установлено, что смещение нейтральной плоскости при изгибе, обусловленное SD-эффектом, зависит от коэффициента разнопрочности и направлено в сторону сжатых волокон. Смещение нейтральной плоскости, вызванное градиентом прочности, зависит от абсолютной величины этого градиента и направлено в сторону градиента. Рассчитано, что величина предельного изгибающего момента при изгибе пластины из стали А32 с градиентом прочностных свойств по толщине не меньше аналогичной величины для нормализованного и термоупрочненного состояния при любом направлении градиента прочности относительно направления изгиба. Сделан вывод, что предложенная технология упрочняющей обработки толстолистового проката из углеродистых и низколегированных сталей с использованием ускоренного одностороннего охлаждения обеспечивает комплекс механических свойств не хуже, чем для термоупрочненного состояния. При этом экономия охлаждающей воды составляет до 40 %.</p></abstract><trans-abstract xml:lang="en"><p>The paper considers the studies of bending of a plate made of A32 ship steel with a through-the-thickness gradient of strength properties. The grading was produced by accelerated one-sided cooling of the plate from the austenitic area. As a result, a spectrum of microstructures was formed over the thickness of the plate: from ferrite-bainite on the cooled surface to ferrite-perlite on the other. During elastic-plastic bending of a steel plate with a homogeneous microstructure, the neutral surface shifts towards the compressed fibers, which is explained by the greater resistance of the material to compression than to tension. The purpose of this work was to develop a finite plastic deformation model of bending of a steel plate with tension/ compression (T/C) asymmetry and a strength gradient to confirm the expediency of one-sided thermal reinforcement of rolled sheets. It is confirmed that the displacement of the neutral surface caused by T/C asymmetry depends on the asymmetry ratio and does not depend on the steel microstructure, and is directed towards the compressed fibers. The displacement caused by the strength gradient depends on the absolute value of this gradient and is directed towards it. Calculations revealed that the critical bending moment for a plate made of A32 steel with a strength gradient is not less than that for the normalized and thermally hardened (by quenching and tempering ) states, at any direction of the strength gradient with respect to the bending direction. It is concluded that the proposed technology of thermal reinforcement of heavy-plate rolled products made of carbon and low-alloy steels using accelerated one-sided cooling provides mechanical properties not worse than for the thermally hardened state. This saves up to 40 % of cooling water.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>судостроительная сталь</kwd><kwd>толстолистовой прокат</kwd><kwd>одностороннее ускоренное охлаждение</kwd><kwd>экономия ресурсов</kwd><kwd>градиент прочности</kwd><kwd>пластический изгиб</kwd><kwd>смещение нейтральной плоскости</kwd><kwd>критический изгибающий момент</kwd><kwd>аналитическое решение</kwd></kwd-group><kwd-group xml:lang="en"><kwd>ship steel</kwd><kwd>steel plate</kwd><kwd>one-sided accelerated cooling</kwd><kwd>resource saving</kwd><kwd>strength gradient</kwd><kwd>plastic bending</kwd><kwd>displacement of neutral surface</kwd><kwd>critical bending moment</kwd><kwd>analytical solution</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена при частичной финансовой поддержке Российского научного фонда (грант № 21-19-00100)</funding-statement><funding-statement xml:lang="en">The work was partially supported by the Russian Science Foundation (grant No. 21-19-00100)</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">Подгайский М.С., Максимов А.Б., Наливайченко Т.М. 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