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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">10.17073/0368-0797-2023-5-554-563</article-id><article-id custom-type="elpub" pub-id-type="custom">blackmet-2626</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>Условия сохранения горячего наклепа в штамповой стали с регулируемым аустенитным превращением при эксплуатации</article-title><trans-title-group xml:lang="en"><trans-title>Preservation conditions of hot work hardening in die steel with regulated austenitic transformation during exploitation</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>Кругляков</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Kruglyakov</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Александр Аркадьевич Кругляков, к.т.н., генеральный директор</p><p>Германия, D-10117, Берлин, Фридрихштрассе, 106 Б</p></bio><bio xml:lang="en"><p>Aleksandr A. Kruglyakov, Cand. Sci. (Eng.), General Director</p><p>106 b Friedrichstrasse, Berlin D-10117, Germany</p></bio><email xlink:type="simple">dr.a.krugljakow@t-online.de</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7769-7748</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Рогачев</surname><given-names>С. О.</given-names></name><name name-style="western" xml:lang="en"><surname>Rogachev</surname><given-names>S. O.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Станислав Олегович Рогачев, к.т.н., доцент кафедры металловедения и физики прочности, Национальный исследовательский технологический университет «МИСИС»; научный сотрудник, Институт металлургии и материаловедения им. А.А. Байкова РАН</p><p>Россия, 119049, Москва, Ленинский пр., 4</p><p>Россия, 119334, Москва, Ленинский пр., 49</p></bio><bio xml:lang="en"><p>Stanislav O. Rogachev, Cand. Sci. (Eng.), Assist. Prof. of the Chair “Metal­lography and Physics of Strength”, National University of Science and Technology “MISIS”; Research Associate, Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences</p><p>4 Leninskii Ave., Moscow 119049, Russian Federation</p><p>49 Leninskii Ave., Moscow 119334, Russian Federation</p></bio><email xlink:type="simple">csaap@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Соколов</surname><given-names>П. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Sokolov</surname><given-names>P. Yu.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Павел Юрьевич Соколов, старший преподаватель</p><p>Россия, 119049, Москва, Ленинский пр., 4</p></bio><bio xml:lang="en"><p>Pavel Yu. Sokolov, Senior Lecturer</p><p>4 Leninskii Ave., Moscow 119049, Russian Federation</p></bio><email xlink:type="simple">sokolov@misis.ru</email><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Приуполин</surname><given-names>Д. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Priupolin</surname><given-names>D. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Денис Викторович Приуполин, студент</p><p>Россия, 119049, Москва, Ленинский пр., 4</p></bio><bio xml:lang="en"><p>Denis V. Priupolin, Student</p><p>4 Leninskii Ave., Moscow 119049, Russian Federation</p></bio><email xlink:type="simple">dpriupolin@gmail.com</email><xref ref-type="aff" rid="aff-3"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Научно-коммерческая фирма WBH</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Scientific Production Association WBH</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Национальный исследовательский технологический университет «МИСИС»; Институт металлургии и материаловедения им. А.А. Байкова РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>National University of Science and Technology “MISIS”; Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Национальный исследовательский технологический университет «МИСИС»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>National University of Science and Technology “MISIS”</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>29</day><month>10</month><year>2023</year></pub-date><volume>66</volume><issue>5</issue><fpage>554</fpage><lpage>563</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Кругляков А.А., Рогачев С.О., Соколов П.Ю., Приуполин Д.В., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Кругляков А.А., Рогачев С.О., Соколов П.Ю., Приуполин Д.В.</copyright-holder><copyright-holder xml:lang="en">Kruglyakov A.A., Rogachev S.O., Sokolov P.Y., Priupolin D.V.</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/2626">https://fermet.misis.ru/jour/article/view/2626</self-uri><abstract><p>Штамповые стали с регулируемым аустенитным превращением при эксплуатации (РАПЭ) – новый класс безвольфрамовых сталей для горячей обработки давлением при рабочих температурах до 750 – 800 °С. Высокая стойкость прессового инструмента и его длительный ресурс обеспечиваются за счет способности этих сталей сохранять горячее деформационное упрочнение (горячий наклеп). Это обстоятельство отличает стали с РАПЭ от традиционных легированных сталей, склонных к разупрочнению при высоких температурах. Однако температурные диапазоны проявления горячего упрочнения в сталях с РАПЭ систематически не изучены, что затрудняет более эффективное использование штампового инструмента. В данной работе изучено механическое поведение штамповой стали с РАПЭ при термомеханической обработке в широком диапазоне температур, включающей этап предварительной деформации при более низких температурах и этап основной деформации при более высоких температурах, соответствующих температурам эксплуатации прессового инструмента. Термомеханическую обработку проводили на закалочно-деформационном дилатометре DIL 805 A/D по схеме сжатия. Получены истинные диаграммы деформации, определены механические характеристики и показатель деформационного упрочнения. Измерен размер бывшего зерна аустенита в структуре стали после термомеханической обработки. Авторы установили температурно-силовые условия, в которых сталь демонстрирует усиление и стабилизацию горячего упрочнения, либо разупрочнение. Показано, что достигнутое на этапе предварительной деформации при температуре 450 °С упрочнение усиливается на этапе основной деформации при температурах в интервале от 550 до 800 °С, при этом в указанном температурном интервале склонность к усилению горячего упрочнения ослабевает.</p></abstract><trans-abstract xml:lang="en"><p>Die steels with regulated austenitic transformation during exploitation (RATE steels) are a new class of tungsten-free steels for hot forming at operating temperatures up to 750 – 800 °C. High durability of the pressing tool and its long service life are ensured by the ability of these steels to preservation of hot work hardening. This circumstance distinguishes RATE steels from traditional alloy steels, which are prone to softening at high temperatures. However, the temperature ranges for the preservation of hot hardening in RATE steels was not systematically studied, which makes it difficult to use a pressing tool more efficiently. In this paper, we study the mechanical behavior of RATE die steel during thermo-mechanical treatment in a wide temperature range, including the stage of preliminary deformation at lower temperatures and the stage of main deformation at higher temperatures corresponding to operating temperatures of the pressing tool. The thermo-mechanical treatment was carried out using a hardening-deformation dilatometer DIL 805 A/D according to the compression mode. We obtained the true stress-strain curves and determined the mechanical characteristics and strain hardening index. Size of the former austenite grain in the steel structure after thermo-mechanical treatment was measured. The temperature-force conditions for enhancing hot hardening or stabilizing hot hardening, or softening, were established. It is shown that the hardening achieved at the stage of preliminary deformation at a temperature of 450 °C is enhanced at the stage of main deformation at temperatures in the range from 550 to 800 °C, while in this temperature range the tendency to increase hot hardening is weakened.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>стали с РАПЭ</kwd><kwd>штамповые стали</kwd><kwd>горячая деформация</kwd><kwd>горячий наклеп</kwd><kwd>аустенит</kwd></kwd-group><kwd-group xml:lang="en"><kwd>RATE steels</kwd><kwd>die steels</kwd><kwd>hot deformation</kwd><kwd>hot work hardening</kwd><kwd>austenite</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Исследование структуры выполнено с использованием оборудования ЦКП «Материаловедение и металлургия» при финансовой поддержке Министерства науки и высшего образования РФ (соглашение № 075-15-2021-696).  	Авторы выражают благодарность к.т.н. Хаткевичу В.М. за советы в организации исследования.</funding-statement><funding-statement xml:lang="en">The study of the structure was carried out using the equipment of the Center for Collective Use “Materials Science and Metallurgy” with the financial support of the Ministry of Science and Higher Education of the Russian Federation (agreement No. 075-15-2021-696).  	The authors express their gratitude to Khatkevich V.M. for advice on the study organization.</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">Горбатюк С.М., Морозова И.Г., Наумова М.Г. Разработка рабочей модели процесса реиндустриализации производства термической обработки штамповых сталей. Известия вузов. Черная металлургия. 2017; 60(5):410–415. https://doi.org/10.17073/0368-0797-2017-5-410-415</mixed-citation><mixed-citation xml:lang="en">Gorbatyuk S.M., Morozova I.G., Naumova M.G. 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