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<article 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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="other" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Frontier Materials &amp; Technologies</journal-id><journal-title-group><journal-title xml:lang="en">Frontier Materials &amp; Technologies</journal-title><trans-title-group xml:lang="ru"><trans-title>Frontier Materials &amp; Technologies</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2782-4039</issn><issn publication-format="electronic">2782-6074</issn><publisher><publisher-name xml:lang="en">Togliatti State University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">568</article-id><article-id pub-id-type="doi">10.18323/2782-4039-2022-3-2-79-89</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Статьи</subject></subj-group><subj-group subj-group-type="article-type"><subject></subject></subj-group></article-categories><title-group><article-title xml:lang="en">Thermal stability of the ЭИ-961Ш steel structure after combined processing</article-title><trans-title-group xml:lang="ru"><trans-title>Термическая стабильность структуры стали ЭИ-961Ш после комбинированной обработки</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0483-2851</contrib-id><name-alternatives><name xml:lang="en"><surname>Frik</surname><given-names>Aleksandra A.</given-names></name><name xml:lang="ru"><surname>Фрик</surname><given-names>Александра Анатольевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>postgraduate student</p></bio><bio xml:lang="ru"><p>аспирант кафедры материаловедения и физики металлов</p></bio><email>frikaleksandra@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5623-6117</contrib-id><name-alternatives><name xml:lang="en"><surname>Nikitina</surname><given-names>Marina A.</given-names></name><name xml:lang="ru"><surname>Никитина</surname><given-names>Марина Александровна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>PhD (Engineering), senior researcher</p></bio><bio xml:lang="ru"><p>кандидат технических наук, старший научный сотрудник</p></bio><email>nik.marina.al@gmail.com</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6234-7363</contrib-id><name-alternatives><name xml:lang="en"><surname>Islamgaliev</surname><given-names>Rinat K.</given-names></name><name xml:lang="ru"><surname>Исламгалиев</surname><given-names>Ринат Кадыханович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Doctor of Sciences (Physics and Mathematics), Professor, professor of Chair of Materials Science and Physics of Metals</p></bio><bio xml:lang="ru"><p>доктор физико-математических наук, профессор, профессор кафедры материаловедения и физики металлов</p></bio><email>rinatis@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Ufa State Aviation Technical University, Ufa</institution></aff><aff><institution xml:lang="ru">Уфимский государственный авиационный технический университет, Уфа</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Bashkir State University, Ufa</institution></aff><aff><institution xml:lang="ru">Башкирский государственный университет, Уфа</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2022-09-30" publication-format="electronic"><day>30</day><month>09</month><year>2022</year></pub-date><issue>3-2</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>79</fpage><lpage>89</lpage><history><date date-type="received" iso-8601-date="2022-09-30"><day>30</day><month>09</month><year>2022</year></date></history><permissions><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/></permissions><self-uri xlink:href="https://vektornaukitech.ru/jour/article/view/568">https://vektornaukitech.ru/jour/article/view/568</self-uri><abstract xml:lang="en"><p>A crucial aspect in the development of materials with improved functional properties is ensuring their ability to withstand the operating temperatures of a finished product. To increase the service life and efficiency of products made of ferrite-martensite steels, various types of deformation and thermal treatments are used. The authors studied the influence of different temperature regimes on the structure and thermal stability of ЭИ-961Ш ferrite-martensite steel subjected to rolling and additional hardening. As a method of deformation and heat treatment, the authors used cold rolling followed by re-quenching from a temperature above the ferrite/austenite phase transition. The samples were rolled during several passes on a laboratory rolling mill with the deformation of 6 % per pass for a final thickness of 4.3 mm to a reduction degree of 70 %. The authors carried out structural studies by transmission electron microscopy and scanning electron microscopy. The study showed that as a rolling result, a bimodal band structure forms with the distribution of Cr<sub>23</sub>C<sub>6</sub> carbide particles along the grain boundaries. When using additional hardening, an increase in the globular carbides proportion is observed, and during the study by transmission electron microscopy, nano-twins were found in the structure. The bands’ width after the reduction by 50 % was 0.5 microns and after cold rolling and additional heat treatment – 0.4 microns. The authors carried out short annealing in the operating temperature range to study the thermal stability of ferrite/martensite steel structure after cold rolling and additional heat treatment. The thermal stability study showed that many structural features formed during previous deformation and heat treatment are preserved, however, after annealing at 600 °C, there are no visually observable nano-twins in the structure.</p></abstract><trans-abstract xml:lang="ru"><p>Важным аспектом при разработке материалов с повышенными функциональными свойствами является обеспечение их способности выдерживать эксплуатационные температуры готового изделия. Для увеличения срока службы и эффективности работы изделий, изготовленных из ферритно-мартенситных сталей, применяются различные виды деформационно-термических обработок. Исследовано влияние различных температурных режимов на структуру и термическую стабильность ферритно-мартенситной стали ЭИ-961Ш, подвергнутой прокатке и дополнительной закалке. В качестве метода деформационно-термической обработки использовалась холодная прокатка с последующей перезакалкой с температуры выше фазового перехода феррит/аустенит. Образцы прокатывали в несколько проходов на лабораторном прокатном стане с деформацией за проход 6 % на конечную толщину 4,3 мм до степени обжатия 70 %. Структурные исследования проводились методом просвечивающей электронной микроскопии и растровой электронной микроскопии. Показано, что в результате прокатки формировалась бимодальная полосовая структура с распределением карбидных частиц Сr<sub>23</sub>C<sub>6</sub> вдоль границ зерен. При применении дополнительной закалки наблюдается увеличение доли глобулярных карбидов, в структуре при исследовании методом просвечивающей электронной микроскопии обнаружены нанодвойники. Ширина полос после обжатия на 50 % составила 0,5 мкм, после холодной прокатки и дополнительной термообработки – 0,4 мкм. Для изучения термической стабильности структуры ферритно-мартерситной стали после холодной прокатки и дополнительной термообработки были проведены короткие отжиги в диапазоне рабочих температур. Изучение термической стабильности показало, что многие структурные особенности, сформированные в результате предшествующей деформационно-термической обработки, сохраняются, однако после отжига при 600 °С в структуре отсутствуют визуально наблюдаемые нанодвойники. </p></trans-abstract><kwd-group xml:lang="en"><kwd>cold rolling</kwd><kwd>ferrite-martensite steel</kwd><kwd>ЭИ-961Ш</kwd><kwd>martensite</kwd><kwd>carbides</kwd><kwd>thermal stability</kwd><kwd>deformation</kwd><kwd>heat treatment</kwd><kwd>reduction</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>холодная прокатка</kwd><kwd>ферритно-мартенситная сталь</kwd><kwd>ЭИ-961Ш</kwd><kwd>мартенсит</kwd><kwd>карбиды</kwd><kwd>термическая стабильность</kwd><kwd>деформация</kwd><kwd>термообработка</kwd><kwd>обжатие</kwd></kwd-group><funding-group><funding-statement xml:lang="en">A.A. Frik expresses gratitude to the Ministry of Science and Higher Education of the Russian Federation for its financial support within the state assignment of the Federal State Budgetary Educational Institution of Higher Education “USATU” (agreement No. 075-03-2022-318/1) “Youth Research Laboratory of the REC “Metals and Alloys under the Extreme Conditions”. M.A. Nikitina expresses gratitude to the Ministry of Science and Higher Education of the Russian Federation for its financial support within the project No. 0838-2020-0006 “Fundamental research of new principles of creation of the advanced electromechanical energy converters with the characteristics higher than the international standards with the improved efficiency and minimum specific indicators with the use of new high-performance electrotechnical materials”. The paper was written on the reports of the participants of the X International School of Physical Materials Science (SPM-2021), Togliatti, September 13–17, 2021.</funding-statement><funding-statement xml:lang="ru">А.А. Фрик благодарит за финансовую поддержку Министерство науки и высшего образования РФ в рамках государственного задания ФГБОУ ВО «УГАТУ» (соглашение № 075-03-2022-318/1) «Молодежная научно-исследовательская лаборатория НОЦ "Металлы и сплавы при экстремальных воздействиях"». М.А. Никитина благодарит за финансовую поддержку Министерство науки и высшего образования РФ в рамках проекта № 0838-2020-0006 «Фундаментальные исследование новых принципов создания перспективных электромеханических преобразователей энергии с характеристиками выше мирового уровня, с повышенной эффективностью и минимальными удельными показателями, с использованием новых высокоэффективных электротехнических материалов». 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