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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">10.17073/0368-0797-2023-5-571-579</article-id><article-id custom-type="elpub" pub-id-type="custom">blackmet-2630</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>МАТЕРИАЛОВЕДЕНИЕ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>MATERIAL SCIENCE</subject></subj-group></article-categories><title-group><article-title>Влияние остаточного аустенита на механические свойства стали с 15 % Cr</article-title><trans-title-group xml:lang="en"><trans-title>Effect of retained austenite on mechanical properties of steel with 15 % Cr</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>Пышминцев</surname><given-names>И. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Pyshmintsev</surname><given-names>I. Yu.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Игорь Юрьевич Пышминцев, д.т.н., профессор, генеральный директор</p><p>Россия, 143026, Москва, Инновационный Центр Сколково, Большой бульвар, 5</p></bio><bio xml:lang="en"><p>Igor’ Yu. Pyshmintsev, Dr. Sci. (Eng.), Prof., General Director</p><p>5 Bol’shoi Blvd.., Skolkovo, Moscow 143026, Russian Federation</p></bio><email xlink:type="simple">PyshmintsevIU@tmk-group.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>Битюков</surname><given-names>С. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Bityukov</surname><given-names>S. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Сергей Михайлович Битюков, к.т.н., заведующий лабораторией</p><p>Россия, 143026, Москва, Инновационный Центр Сколково, Большой бульвар, 5</p></bio><bio xml:lang="en"><p>Sergei M. Bityukov, Cand. Sci. (Eng.), Head of the Laboratory</p><p>5 Bol’shoi Blvd.., Skolkovo, Moscow 143026, Russian Federation</p></bio><email xlink:type="simple">BitiukoySM@tmk-group.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>Гусев</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Gusev</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Алексей Антонович Гусев, младший научный сотрудник</p><p>Россия, 143026, Москва, Инновационный Центр Сколково, Большой бульвар, 5</p></bio><bio xml:lang="en"><p>Aleksei A. Gusev,  Junior Researcher</p><p>5 Bol’shoi Blvd.., Skolkovo, Moscow 143026, Russian Federation</p></bio><email xlink:type="simple">GusevAA1@tmk-group.com</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ООО «Исследовательский центр  ТМК»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>LLC “Research Center TMK”</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>11</day><month>11</month><year>2023</year></pub-date><volume>66</volume><issue>5</issue><fpage>571</fpage><lpage>579</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Пышминцев И.Ю., Битюков С.М., Гусев А.А., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Пышминцев И.Ю., Битюков С.М., Гусев А.А.</copyright-holder><copyright-holder xml:lang="en">Pyshmintsev I.Y., Bityukov S.M., Gusev A.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/2630">https://fermet.misis.ru/jour/article/view/2630</self-uri><abstract><p>Исследованы особенности влияния остаточного аустенита на механические свойства стали аустенитно-мартенситного класса с 15 % Cr после различных режимов термической обработки. По окончании нагрева под закалку и последующего отпуска или нагрева в межкритический интервал температур в микроструктуре стали сохраняется значительное количество остаточного аустенита, что затрудняет достижение высокого предела текучести. Дестабилизация остаточного аустенита с последующим превращением в «свежий» мартенсит обеспечивается за счет многоступенчатой термической обработки, включающей закалку, нагрев в межкритический интервал температур или выше точки АС3 и заключительный отпуск. Установлено, что сохранившийся в микроструктуре двухфазной стали остаточный аустенит имеет форму блоков и тонких прослоек, расположенных в межреечном пространстве. Испытание на растяжение стали с 15 % Cr показало, что многоступенчатая термообработка обеспечивает высокопрочное состояние, соответствующее группам прочности Q125 и Q135. Сравнительный анализ характера деформации аустенитно-мартенситной стали в различных состояниях свидетельствует о смещении начала мартенситного превращения при растяжении после заключительного отпуска в упругую область с образованием мартенсита напряжения. Для стали с 15 % Cr установлена ограниченная деформационная устойчивость остаточного аустенита блочной формы, преимущественно претерпевающего мартенситное превращение при испытаниях на растяжение и удар при отрицательной температуре. Предположительно, этим обусловлена заметно меньшая ударная вязкость аустенитно-мартенситной стали с 15 % Cr по сравнению со сталью мартенситного класса с 13 % Cr при равной прочности.</p></abstract><trans-abstract xml:lang="en"><p>The paper considers the study of influence of retained austenite on the mechanical properties of steel of the austenite-martensitic class based on 15 % Cr after various heat treatment. Significant amount of retained austenite remains in the steel microstructure after quenching and subsequent tempering or heating in the intercritical temperature range that makes difficult to achieve a high yield strength. Destabilization of retained austenite with subsequent transformation into newly formed martensite is provided by multi-stage heat treatment which includes quenching, heating in the intercritical temperature range or above the AC3 point and final tempering. It was established that retained austenite remains in the microstructure of two-phase steel and has the form of blocks and thin layers located in the inter-lath space. Tensile testing of steel based on 15 % Cr showed that multi-stage heat treatment provides a high-strength condition corresponding to strength groups Q125 and Q135. A comparative analysis of deformation behavior of semi-austenitic steel in various states indicates that the beginning of the martensitic transformation after the final tempering shifts into the elastic region during tension and leads to the formation of stress-assisted martensite. It was determined that block-shaped retained austenite in steel with 15 % Cr predominantly undergoes martensitic transformation during tensile and impact tests at a subzero temperature. This is supposed to be the reason for the noticeably lower impact toughness of semi-austenitic steel with 15 % Cr compared to martensitic steel with 13 % Cr at equal strength.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>нержавеющие высокопрочные стали</kwd><kwd>стали переходного класса</kwd><kwd>термическая обработка</kwd><kwd>закалка</kwd><kwd>отпуск</kwd><kwd>мартенсит</kwd><kwd>остаточный аустенит</kwd><kwd>ударная вязкость</kwd><kwd>фазовый состав</kwd><kwd>микрорентгеноспектральный анализ</kwd><kwd>просвечивающая электронная микроскопия</kwd><kwd>дифракция обратного рассеяния электронов</kwd></kwd-group><kwd-group xml:lang="en"><kwd>stainless high-strength steels</kwd><kwd>semi-austenitic steels</kwd><kwd>heat treatment</kwd><kwd>hardening</kwd><kwd>tempering</kwd><kwd>martensite</kwd><kwd>retained austenite</kwd><kwd>impact toughness</kwd><kwd>phase composition</kwd><kwd>X-ray microanalysis</kwd><kwd>transmission electron microscopy</kwd><kwd>electron backscatter diffraction</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">ANSI/API Spec 5CRA. 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