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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">10.17073/0368-0797-2021-7-498-509</article-id><article-id custom-type="elpub" pub-id-type="custom">blackmet-2148</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 длительного высокотемпературного воздействия на ударную вязкость основного металла и металла шва сварного соединения стали 22К</article-title><trans-title-group xml:lang="en"><trans-title>Influence of long-term high-temperature action on impact toughness of base metal and weld metal of 22K steel welded joint</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>Никулин</surname><given-names>С. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Nikulin</surname><given-names>S. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Сергей Анатольевич Никулин, доктор технических наук, профессор, заведующий кафедрой металловедения и физики прочности</p><p>119049, Москва, Ленинский пр., 4</p></bio><bio xml:lang="en"><p>Sergei A. Nikulin, Dr. Sci. (Eng.), Prof., Head of the Chair “Metallography and Physics of Strength”</p><p>4 Leninskii Ave., Moscow 119049</p></bio><email xlink:type="simple">nikulin@misis.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/0000-0001-7769-7748</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, кандидат технических наук, доцент кафедры металловедения и физики прочности</p><p>119049, Москва, Ленинский пр., 4</p></bio><bio xml:lang="en"><p>Stanislav O. Rogachev, Cand. Sci. (Eng.), Assist. Prof. of the Chair “Metallography and Physics of Strength”</p><p>4 Leninskii Ave., Moscow 119049</p></bio><email xlink:type="simple">csaap@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/0000-0002-4183-9019</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Белов</surname><given-names>В. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Belov</surname><given-names>V. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Владислав Алексеевич Белов, кандидат технических наук, доцент кафедры металловедения и физики прочности</p><p>119049, Москва, Ленинский пр., 4</p></bio><bio xml:lang="en"><p>Vladislav A. Belov, Cand. Sci. (Eng.), Assist. Prof. of the Chair “Metallography and Physics of Strength”</p><p>4 Leninskii Ave., Moscow 119049</p></bio><email xlink:type="simple">vbelov@ymail.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/0000-0001-5125-9870</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Комиссаров</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Komissarov</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Александр Александрович Комиссаров, кандидат технических наук, доцент, заведующий лабораторией «Гибридные наноструктурные материалы»</p><p>119049, Москва, Ленинский пр., 4</p></bio><bio xml:lang="en"><p>Aleksandr A. Komissarov, Cand. Sci. (Eng.), Assist. Prof., Head of the Laboratory “Hybrid Nanostructured Materials”</p><p>4 Leninskii Ave., Moscow 119049</p></bio><email xlink:type="simple">komissarov@misis.ru</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>Турилина</surname><given-names>В. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Turilina</surname><given-names>V. Yu.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Вероника Юрьевна Турилина, кандидат технических наук, доцент кафедры металловедения и физики прочности</p><p>119049, Москва, Ленинский пр., 4</p></bio><bio xml:lang="en"><p>Veronika Yu. Turilina, Cand. Sci. (Eng.), Assist. Prof. of the Chair “Metallography and Physics of Strength”</p><p>4 Leninskii Ave., Moscow 119049</p></bio><email xlink:type="simple">veronikat77@gmail.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>Шплис</surname><given-names>Н. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Shplis</surname><given-names>N. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Николай Валерьевич Шплис, инженер</p><p>119049, Москва, Ленинский пр., 4</p></bio><bio xml:lang="en"><p>Nikolai V. Shplis, Engineer</p><p>4 Leninskii Ave., Moscow 119049</p></bio><email xlink:type="simple">shplisnikolay@mail.ru</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>Николаев</surname><given-names>Ю. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Nikolaev</surname><given-names>Yu. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Юрий Анатольевич Николаев, доктор технических наук, ведущий научный сотрудник</p><p>Россия, 123182, Москва, пл. Академика Курчатова, 1</p></bio><bio xml:lang="en"><p>Yurii A. Nikolaev, Dr. Sci. (Eng.), Prof., Leading Researcher</p><p>1 Akademika Kurchatova Sqr., Moscow 123182, Russian Federation</p></bio><email xlink:type="simple">Nikolaev_YA@nrcki.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><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><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>НИЦ «Курчатовский институт»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>National Research Center “Kurchatov Institute“</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>27</day><month>08</month><year>2021</year></pub-date><volume>64</volume><issue>7</issue><fpage>498</fpage><lpage>509</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Никулин С.А., Рогачев С.О., Белов В.А., Комиссаров А.А., Турилина В.Ю., Шплис Н.В., Николаев Ю.А., 2021</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="ru">Никулин С.А., Рогачев С.О., Белов В.А., Комиссаров А.А., Турилина В.Ю., Шплис Н.В., Николаев Ю.А.</copyright-holder><copyright-holder xml:lang="en">Nikulin S.A., Rogachev S.O., Belov V.A., Komissarov A.A., Turilina V.Y., Shplis N.V., Nikolaev Y.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/2148">https://fermet.misis.ru/jour/article/view/2148</self-uri><abstract><p>Одно из применений строительных низкоуглеродистых сталей типа 22К – в качестве материала корпуса устройства локализации расплава (УЛР) для атомных электростанций с водо-водяными энергетическими реакторами. При развитии тяжелой запроектной аварии корпус УЛР будет находиться в условиях длительных высокотемпературных воздействий, что может существенно изменить структурное состояние и привести к деградации механических свойств материала корпуса. Данные о влиянии таких воздействий на механические свойства и сопротивление разрушению сварных швов (свойства которых обычно отличаются от свойств основного металла) из низкоуглеродистых сталей очень ограничены в литературных источниках, что затрудняет гарантирование прогноза надежности и безопасности УЛР. Целью настоящей работы являлось проведение сравнительных испытаний на ударный изгиб образцов основного металла и металла шва сварного соединения стали 22К до и после длительной высокотемпературной термической обработки, имитирующей термическое воздействие в условиях тяжелой аварии на материал корпуса АЭС. Сварные соединения листов из стали 22К между собой получали методом автоматической аргонодуговой сварки плавящимся электродом (применялась сварочная проволока СВ-08Г2С) в соответствии с ПНАЭ Г-7-009–89. По результатам испытаний строились сериальные кривые и проводился анализ изломов образцов. Изучено влияние структурных факторов на ударную вязкость KCV. Показано, что длительное высокотемпературное воздействие приводит к повышению температур начала и конца вязко-хрупкого перехода на 30 – 50 °С и расширению на 15 – 25 °С интервала температур вязко-хрупкого перехода как основного металла, так и металла шва сварного соединения.</p></abstract><trans-abstract xml:lang="en"><p>One of the applications of construction low-carbon 22K steel (AISI 1022 type) is as a material for the vessel of a core catcher (CC) for nuclear power plants with VVER reactors. In the event of severe beyond design basis accident, the CC-vessel will be under conditions of prolonged hightemperature impacts, which can significantly change the structural state and lead to degradation of mechanical properties of the vessel material. Data on the effect of such actions on the mechanical properties and fracture resistance of welds (the properties of which usually differ from those of the base metal) from low-carbon steels are very limited in the literature. This makes it difficult to guarantee the reliability and safety prediction of CC. The purpose of this work was to carry out the comparative Charpy V-notch impact tests of the samples of base metal and weld metal of the 22K steel welded joint before and after long-term high-temperature heat treatment, simulating the thermal effect on the reactor vessel material of nuclear power plants during severe accidents. Welded joints of 22K steel sheets were obtained by the method of automatic argon-arc welding with a consumable electrode (welding wire SV-08G2S was used) in accordance with PNAE G-7-009–89. Based on the test results, the ductile–brittle transition curves were plotted and analysis of fracture surfaces after tests was carried out. The influence of structural factors on the impact toughness has been studied. It is shown that prolonged high-temperature exposure leads to an increase in the temperatures of beginning and end of the ductile-brittle transition by 30 – 50 °C and to the expansion of range of the ductile-brittle transition temperature by 15 – 25 °C of both base metal and weld metal of the welded joint.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>низкоуглеродистая сталь</kwd><kwd>устройство локализации расплава</kwd><kwd>сварной шов</kwd><kwd>ударная вязкость</kwd><kwd>сериальные кривые</kwd><kwd>микро- структура</kwd><kwd>термическая обработка</kwd><kwd>разрушение</kwd></kwd-group><kwd-group xml:lang="en"><kwd>low-carbon steel</kwd><kwd>core catcher</kwd><kwd>weld</kwd><kwd>impact toughness</kwd><kwd>ductile–brittle transition curves</kwd><kwd>microstructure</kwd><kwd>heat treatment</kwd><kwd>fracture</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">Лившиц Л.С., Хакимов А.Н. 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