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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">10.17073/0368-0797-2023-6-688-695</article-id><article-id custom-type="elpub" pub-id-type="custom">blackmet-2657</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 износные характеристики чугуна после лазерной модификации поверхности</article-title><trans-title-group xml:lang="en"><trans-title>Structure and wear characteristics of cast iron after laser surface modification</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5299-886X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Яресько</surname><given-names>С. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Yares’ko</surname><given-names>S. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Сергей Игоревич Яресько, д.т.н., заведующий лабораторией лазерно-индуцированных процессов, старший научный сотрудник</p><p>Россия, 443011, Самара, ул. Ново-Садовая, 221</p></bio><bio xml:lang="en"><p>Sergei I. Yares’ko, Dr. Sci. (Eng.), Head of the Laboratory of Laser-Induced Processes, Senior Researcher</p><p>221 Novo-Sadovaya Str., Samara 443011, Russian Federation</p></bio><email xlink:type="simple">yarsi54@gmail.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/0000-0003-4329-3619</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Гусева</surname><given-names>Г. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Guseva</surname><given-names>G. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Галина Валентиновна Гусева, инженер-технолог</p><p>Россия, 443011, Самара, ул. Ново-Садовая, 221</p></bio><bio xml:lang="en"><p>Galina V. Guseva, Engineer-Technologist</p><p>221 Novo-Sadovaya Str., Samara 443011, Russian Federation</p></bio><email xlink:type="simple">guseva_g.v@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/0000-0003-0602-7717</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Щербаков</surname><given-names>В. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Shcherbakov</surname><given-names>V. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Владимир Иванович Щербаков, инженер-исследователь</p><p>Россия, 443011, Самара, ул. Ново-Садовая, 221</p></bio><bio xml:lang="en"><p>Vladimir I. Shcherbakov, Research Engineer</p><p>221 Novo-Sadovaya Str., Samara 443011, Russian Federation</p></bio><email xlink:type="simple">vladimir@fian.smr.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/0000-0002-7816-9696</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Казакевич</surname><given-names>П. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Kazakevich</surname><given-names>P. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Павел Владимирович Казакевич, к.ф.-м.н., старший научный сотрудник</p><p>Россия, 443011, Самара, ул. Ново-Садовая, 221</p></bio><bio xml:lang="en"><p>Pavel V. Kazakevich, Cand. Sci. (Phys.-Math.), Senior Researcher</p><p>221 Novo-Sadovaya Str., Samara 443011, Russian Federation</p></bio><email xlink:type="simple">morteus@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Самарский филиал Физического института им. П.Н. Лебедева РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Samara Branch of Lebedev Physical Institute, Russian Academy of Sciences</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>12</month><year>2023</year></pub-date><volume>66</volume><issue>6</issue><fpage>688</fpage><lpage>695</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Яресько С.И., Гусева Г.В., Щербаков В.И., Казакевич П.В., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Яресько С.И., Гусева Г.В., Щербаков В.И., Казакевич П.В.</copyright-holder><copyright-holder xml:lang="en">Yares’ko S.I., Guseva G.V., Shcherbakov V.I., Kazakevich P.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/2657">https://fermet.misis.ru/jour/article/view/2657</self-uri><abstract><p>Представлены результаты исследований макро- и микроструктуры легированного хромованадиевого чугуна после лазерной обработки (ЛО) на воздухе с использованием непрерывного лазерного источника при вариации его мощности от 60 до 100 Вт и скорости сканирования лазерного луча, изменяющейся от 5 до 17 мм/с. Методами металлографии и дюрометрии определены состав и структура зон лазерного воздействия (ЗЛВ). Лазерная обработка с незначительным оплавлением поверхности приводит к существенному росту микротвердости в ЗЛВ. В поверхностном слое ЗЛВ в зоне оплавления основной структурой является мартенсит, а в зоне закалки превалирует ледебуритная структура. Для исследованных режимов ЛО глубина ЗЛВ составляет 220 ‒ 310 мкм. При этом микротвердость более чем в 2,5 ‒ 4,2 раза больше микротвердости основного металла (820 HV0,1), что является существенным фактором повышения износостойкости материала. При лазерной обработке без оплавления поверхности существенных изменений структуры не установлено. Для выявления роли ЛО в изнашивании чугуна проводили испытания на трение скольжения по схеме «диск ‒ палец» при давлении в зоне контакта 12,5 МПа и скорости вращения индентора 580 об/мин. По данным испытаний установлено значительное уменьшение линейного износа и интенсивности изнашивания после ЛО с оплавлением поверхности. Интенсивность изнашивания уменьшается более чем в 100 раз, а линейный износ более чем в 50 раз. Характеристики поверхности ЗЛВ обуславливают уменьшение коэффициента трения на 30 % по сравнению с необработанной поверхностью.</p></abstract><trans-abstract xml:lang="en"><p>The paper presents the results of studies of macro- and microstructure of alloyed chromium-vanadium cast iron after laser treatment (LT) in air using a continuous laser source with a variation in its power from 60 to 100 W and scanning speed of the laser beam varying from 5 to 17 mm/s. Metallography and durometry methods were used to determine composition and structure of the laser exposure zones (LEZ). It is shown that LT with a slight melting of the surface leads to a significant increase in microhardness in LEZ. In this case, martensite is the main structure in the near-surface layer of LEZ in the melting zone, and ledeburite structure prevails in the quenching zone. For the studied LT modes, LEZ depth is 220 – 310 μm. At the same time, microhardness is more than 2.5 – 4.2 times higher than microhardness of the base metal and reaches 820 HV0.1, that is a significant factor in increasing the wear resistance of the material. On the contrary, no significant structural changes were found in the case of LT without melting the surface. In order to identify the role of LT in wear of cast iron, sliding friction tests were carried out according to the “disk – finger” scheme at a pressure in the contact zone of 12.5 MPa and indenter rotation speed of 580 rpm. According to the test data, a significant decrease in linear wear and the wear intensity after the surface melting was found. The wear intensity is reduced by more than 100 times, and linear wear – by more than 50 times. The characteristics of LEZ surface cause a decrease in the friction coefficient by 30 % relative to the untreated surface.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>лазерная обработка</kwd><kwd>чугун</kwd><kwd>зона лазерного воздействия</kwd><kwd>металлография</kwd><kwd>микротвердость</kwd><kwd>трибологические испытания</kwd><kwd>интенсивность изнашивания</kwd></kwd-group><kwd-group xml:lang="en"><kwd>laser treatment</kwd><kwd>cast iron</kwd><kwd>laser exposure zone</kwd><kwd>metallography</kwd><kwd>microhardness</kwd><kwd>tribo-tests</kwd><kwd>wear intensity</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">Кулешов И.И., Ходаковский В.М. Повышение эффективности лазерного упрочнения чугунных деталей судовых энергетических установок. Вестник государственного университета морского и речного флота им. адмирала C.О. 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