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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">vsgiu</journal-id><journal-title-group><journal-title xml:lang="ru">Вестник Сибирского государственного индустриального университета</journal-title><trans-title-group xml:lang="en"><trans-title>Bulletin of the Siberian State Industrial University</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2304 - 4497</issn><issn pub-type="epub">2307-1710</issn><publisher><publisher-name>Федеральное государственное бюджетное образовательное учреждение высшего образования "Сибирский государственный индустриальный университет"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.57070/2304-4497-2026-1(55)-63-72</article-id><article-id custom-type="elpub" pub-id-type="custom">vsgiu-913</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>Раздел 2. Металлургия и материаловедение</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Section 2. Metallurgy and Materials Science</subject></subj-group></article-categories><title-group><article-title>ВЛИЯНИЕ РЕЖИМОВ ЛАЗЕРНОЙ НАПЛАВКИ НА КОЭФФИЦИЕНТ ТЕРМИЧЕСКОГО ЛИНЕЙНОГО РАСШИРЕНИЯ СПЛАВА МАРКИ ЭП648</article-title><trans-title-group xml:lang="en"><trans-title>INFLUENCE OF LASER SURFACING MODES ON THE COEFFICIENT OF LINEAR THERMAL EXPANSION OF EP648 MATERIAL</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0007-6537-0079</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Негодяев</surname><given-names>Вадим Олегович</given-names></name><name name-style="western" xml:lang="en"><surname>Negodyaev</surname><given-names>Vadim O.</given-names></name></name-alternatives><bio xml:lang="ru"><p>аспирант кафедры литейных и высокоэффективных технологий, начальник бюро сварки и пайки</p></bio><bio xml:lang="en"><p>Postgraduate student of the Department of Foundry and High-Efficiency Technologies, Head of the Welding and Soldering Bureau</p></bio><email xlink:type="simple">vadim031198@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>Илларионов</surname><given-names>Дмитрий Владимирович</given-names></name><name name-style="western" xml:lang="en"><surname>Illarionov</surname><given-names>Dmitry V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>магистр кафедры литейных и высокоэффективных технологий, инженер-технолог</p></bio><bio xml:lang="en"><p>master’s student of the Department of Foundry and High-Efficiency Technologies, Process Engineer</p></bio><email xlink:type="simple">ya@illarionov-1.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5625-848X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Жаткин</surname><given-names>Сергей Сергеевич</given-names></name><name name-style="western" xml:lang="en"><surname>Zhatkin</surname><given-names>Sergey S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>к.т.н., профессор кафедры литейных и высокоэффективных технологий</p><p> </p></bio><bio xml:lang="en"><p>Cand. Sci. (Eng.), Professor of the Department of Foundry and High-Performance Technologies</p></bio><email xlink:type="simple">sergejat@mail.ru</email><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7061-0144</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Никитин</surname><given-names>Константин Владимирович</given-names></name><name name-style="western" xml:lang="en"><surname>Nikitin</surname><given-names>Konstantin V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>д.т.н., профессор кафедры литейных и высокоэффективных технологий, декан факультета машиностроения, металлургии и транспорта</p></bio><bio xml:lang="en"><p>Dr. Sci. (Eng.), Professor of the Department of Foundry and High-Efficiency Technologies, Dean of the Faculty of Mechanical Engineering, Metallurgy and Transport</p></bio><email xlink:type="simple">kvn-6411@mail.ru</email><xref ref-type="aff" rid="aff-3"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Самарский государственный технический университет, ПАО «ОДК-Кузнецов»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Samara State Technical University, PJSC UEC-Kuznetsov</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Самарский государственный технический университет, ПАО «ОДК-Кузнецов»</institution><country>Russian Federation</country></aff><aff xml:lang="en"><institution>Samara State Technical University,  PJSC UEC-Kuznetsov</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Самарский государственный технический университет</institution><country>Russian Federation</country></aff><aff xml:lang="en"><institution>Samara State Technical University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>31</day><month>03</month><year>2026</year></pub-date><volume>0</volume><issue>1</issue><fpage>63</fpage><lpage>72</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Негодяев В., Илларионов Д., Жаткин С., Никитин К., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Негодяев В., Илларионов Д., Жаткин С., Никитин К.</copyright-holder><copyright-holder xml:lang="en">Negodyaev V., Illarionov D., Zhatkin S., Nikitin K.</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://vestnik.sibsiu.ru/jour/article/view/913">https://vestnik.sibsiu.ru/jour/article/view/913</self-uri><abstract><p>Рассмотрена проблема восстановления посадочных поверхностей валов газотурбинных установок, в частности, применение технологии прямой лазерной наплавки (ПЛН) с использованием сплава ЭП648 (ХН50ВМТЮБ) для ремонта деталей из материала ЭП693 (ХН68ВМТЮК‑ВД). Технология ПЛН в качестве метода восстановления валов имеет преимущество по сравнению с традиционными методами за счет высокого уровня автоматизации и меньших остаточных напряжений. Особое внимание уделено подбору оптимального режима наплавки сплава ЭП648, обеспечивающего минимальную разницу в термическом расширении материалов, что критически важно для надежности восстановленных деталей в условиях термического циклирования. Для исследования использовали заготовки, наплавленные по трем режимам из металлопорошковой композиции марки ЭП648 (ТУ 1-595-16-1260 ‒ 2011), и один образец из прутка марки ЭП693 (ГОСТ 2590 ‒ 2006). Измерение коэффициента термического линейного расширения (КТЛР) проводили на механическом дилатометре при нагреве образцов от 25 до 400 °С. Приведены исследования влияния режимов прямой лазерной наплавки на коэффициент термического линейного расширения наплавляемого материала марки ЭП648 и сравнение данных коэффициентов с материалом прутка марки ЭП693. Подтверждено, что сплав ЭП648 является перспективным материалом для ПЛН валов из материала ЭП693, так как демонстрирует схожее термическое поведение при измерениях КТЛР. Определен оптимальный режим наплавки при погонной энергии 60 Дж/мм, обеспечивающий однородную структуру без дефектов и оптимальное значении КТЛР. Получены регрессионные зависимости, позволяющие прогнозировать изменение размеров вала за счет теплового расширения при эксплуатации и оптимизировать параметры процесса ремонта.</p></abstract><trans-abstract xml:lang="en"><p>The problem of restoring the shaft mounting surfaces of gas turbine installations is considered, in particular, the use of direct laser surfacing technology using EP648 alloy (KHN50VMTYUB) to repair parts made of EP693 material (KHN68VMTYUK VD). PLC technology as a shaft restoration method has an advantage over traditional methods due to a high level of automation and lower residual stresses. Special attention is paid to the selection of the optimal mode of deposition of the EP648 alloy, which ensures a minimal difference in the thermal expansion of the materials, which is critically important for the reliability of the restored parts under thermal cycling conditions. For the study, blanks deposited in three modes from an EP648 metal powder composition (TU 1-595-16-1260 ‒ 2011) and one preparation from an EP693 rod (GOST 2590 ‒ 2006) were used. The coefficient of thermal linear expansion (KTLR) was measured on a mechanical dilatometer when the samples were heated from 25 to 400 °C. Studies of the effect of direct laser surfacing modes on the coefficient of thermal linear expansion of the deposited material of the EP648 brand and a comparison of these coefficients with the material of the EP693 brand rod are presented. It has been confirmed that EP648 alloy is a promising material for EP693 shaft bearings, as it demonstrates similar thermal behavior during KTLR measurements. The optimal surfacing mode has been determined at a running energy of 60 J/mm, which ensures a homogeneous structure without defects and an optimal KTLR value. Regression dependences have been obtained that make it possible to predict changes in shaft size due to thermal expansion during operation and optimize the parameters of the repair process.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>газотурбинный двигатель</kwd><kwd>вал</kwd><kwd>порошковая металлургия</kwd><kwd>прямая лазерная наплавка</kwd><kwd>коэффициент термического линейного расширения</kwd><kwd>погонная энергия</kwd><kwd>микроструктура</kwd><kwd>макроструктура</kwd></kwd-group><kwd-group xml:lang="en"><kwd>gas turbine engine</kwd><kwd>shaft</kwd><kwd>powder metallurgy</kwd><kwd>direct laser cladding</kwd><kwd>coefficient of linear thermal expansion</kwd><kwd>linear energy</kwd><kwd>microstructure</kwd><kwd>macrostructure</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">Слепова А.Ш. Анализ факторов, влияющих на износ подшипников. 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