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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">10.17073/0368-0797-2025-6-594-597</article-id><article-id custom-type="elpub" pub-id-type="custom">blackmet-2995</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>Структура и свойства сплавов специального назначения после отжига</article-title><trans-title-group xml:lang="en"><trans-title>Structure and properties of special-purpose alloys after annealing</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8010-9134</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Попова</surname><given-names>М. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Popova</surname><given-names>M. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Марина Владимировна Попова, д.т.н., доцент, профессор кафед­ры «Обработка металлов давлением и материаловедение. ЕВРАЗ ЗСМК»</p><p>Россия, 654007, Кемеровская обл. – Кузбасс, Новокузнецк, ул. Кирова, 42</p></bio><bio xml:lang="en"><p>Marina V. Popova, Dr. Sci. (Eng.), Assist. Prof., Prof. of the Chair of Metal Forming and Materials Science. EVRAZ ZSMK</p><p>42 Kirova Str., Novokuznetsk, Kemerovo Region – Kuzbass 654007, Russian Federation</p><p> </p></bio><email xlink:type="simple">m.popova@sibsiu.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>Полунин</surname><given-names>А. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Polunin</surname><given-names>A. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Александр Михайлович Полунин, аспирант кафедры «Обработка металлов давлением и материаловедение. ЕВРАЗ ЗСМК»</p><p>Россия, 654007, Кемеровская обл. – Кузбасс, Новокузнецк, ул. Кирова, 42</p></bio><bio xml:lang="en"><p>Aleksandr M. Polunin, Postgraduate of the Chair of Metal Forming and Materials Science. EVRAZ ZSMK</p><p>42 Kirova Str., Novokuznetsk, Kemerovo Region – Kuzbass 654007, Russian Federation</p></bio><email xlink:type="simple">alekcandr2025@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Сибирский государственный индустриальный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Siberian State Industrial University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>08</day><month>01</month><year>2026</year></pub-date><volume>68</volume><issue>6</issue><fpage>594</fpage><lpage>597</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Попова М.В., Полунин А.М., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Попова М.В., Полунин А.М.</copyright-holder><copyright-holder xml:lang="en">Popova M.V., Polunin A.M.</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/2995">https://fermet.misis.ru/jour/article/view/2995</self-uri><abstract><p>Сплавы специального назначения на основе системы Al – Si – Cu в современных условиях широко используются в различных отраслях промышленности, включая двигателе- и приборостроение. В работе изучено влияние отжига в интервале 100 – 900 °С на микроструктуру, плотность и микротвердость сплава Al – 30 % Si – 50 % Cu. С помощью сканирующей электронной микроскопии установлено, что с повышением температуры отжига происходят изменение формы частиц эвтектического кремния и их коагуляция. Согласно результатам микрорентгеноспектрального анализа изменение строения эвтектики сопровождается сегрегацией меди в ее отдельных участках. После отжига происходит небольшое уменьшение плотности и микротвердости сплава.</p></abstract><trans-abstract xml:lang="en"><p>Special-purpose alloys based on the Al – Si – Cu system are widely used in various industries, including engine and instrument engineering. The effect of annealing in the range of 100 – 900 °C on microstructure, density, and microhardness of Al – 30 % Si – 50 % Cu alloy was studied. Scanning electron microscopy showed that as the annealing temperature increases, the form of eutectic silicon particles changes and their coagulation occurs. According to the results of microrentgenospectral analysis, change in the eutectic structure is accompanied by segregation of copper in its individual sections. After annealing, there is a slight decrease in density and microhardness of the alloy.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>специальные сплавы</kwd><kwd>алюминий</kwd><kwd>кремний</kwd><kwd>медь</kwd><kwd>отжиг</kwd><kwd>микроструктура</kwd><kwd>эвтектика</kwd><kwd>микротвердость</kwd><kwd>плотность</kwd></kwd-group><kwd-group xml:lang="en"><kwd>special alloys</kwd><kwd>aluminum</kwd><kwd>silicon</kwd><kwd>copper</kwd><kwd>annealing</kwd><kwd>microstructure</kwd><kwd>eutectic</kwd><kwd>microhardness</kwd><kwd>density</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">Kasprzak W., Sahoo M., Sokolowski J., Yamagata H., Kuri­­ta H. The effect of the melt temperature and the cooling rate on the microstructure of the Al–20% Si alloy used for monolithic engine blocks. 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