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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">10.17073/0368-0797-2025-4-357-365</article-id><article-id custom-type="elpub" pub-id-type="custom">blackmet-2936</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>Предельные энергетические характеристики при лазерной импульсной обработке вольфрамокобальтовых твердых сплавов</article-title><trans-title-group xml:lang="en"><trans-title>Limiting energy characteristics during laser pulse treatment of tungsten-cobalt hard alloys</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>Yaresko</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</p><p>Россия, 443011, Самара, ул. Ново-Садовая, 221</p></bio><bio xml:lang="en"><p>Sergei I. Yaresko, Dr. Sci. (Eng.), Head of the Laboratory of Laser-Induced Processes</p><p>221 Novo-Sadovaya Str., Samara 443011, Russian Federation</p></bio><email xlink:type="simple">serg19541959@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>Балакиров</surname><given-names>С. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Balakirov</surname><given-names>S. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Сергей Николаевич Балакиров, инженер лаборатории лазерно-индуцированных процессов</p><p>Россия, 443011, Самара, ул. Ново-Садовая, 221</p></bio><bio xml:lang="en"><p>Sergei N. Balakirov, Engineer of the Laboratory of Laser-Induced Processes</p><p>221 Novo-Sadovaya Str., Samara 443011, Russian Federation</p></bio><email xlink:type="simple">s.balakirov@yandex.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/0000-0003-1310-1284</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Осколкова</surname><given-names>Т. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Oskolkova</surname><given-names>T. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Татьяна Николаевна Осколкова, д.т.н., профессор кафедры металлургии черных металлов и химической технологии</p><p>Россия, 654007, Кемеровская обл. – Кузбасс, Новокузнецк, ул. Кирова, 42</p></bio><bio xml:lang="en"><p>Tat’yana N. Oskolkova, Dr. Sci. (Eng.), Prof. of the Chair of Ferrous Metal­lurgy and Chemical Technology</p><p>42 Kirova Str., Novokuznetsk, Kemerovo Region – Kuzbass 654007, Russian Federation</p></bio><email xlink:type="simple">oskolkova@kuz.ru</email><xref ref-type="aff" rid="aff-2"/></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 the Lebedev Institute of Physics, Russian Academy of Sciences</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><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>22</day><month>08</month><year>2025</year></pub-date><volume>68</volume><issue>4</issue><fpage>357</fpage><lpage>365</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Яресько С.И., Балакиров С.Н., Осколкова Т.Н., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Яресько С.И., Балакиров С.Н., Осколкова Т.Н.</copyright-holder><copyright-holder xml:lang="en">Yaresko S.I., Balakirov S.N., Oskolkova T.N.</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/2936">https://fermet.misis.ru/jour/article/view/2936</self-uri><abstract><p>Рассматриваемый аналитический метод определения оптимального режима упрочняющей импульсной лазерной обработки (ЛО) вольфрамокобальтовых твердых сплавов основан на исследовании закономерностей формирования температурного поля при упрочнении твердых сплавов, определении термических напряжений, возникающих в зоне лазерного воздействия (ЗЛВ) при лазерной импульсной обработке, и сравнении их с напряжениями разрушения отдельных структурных элементов сплава. Оптимальными режимами упрочняющей ЛО сплавов группы ВК считаются режимы, удовлетворяющие двум критериям. Во-первых, температура на поверхности ЗЛВ должна находиться в интервале 1290 °С &lt; T &lt; 1400 °С, когда в ЗЛВ не присутствуют разупрочняющие сплав фазы типов η-Co3W3C, θ-Co3W2C, χ-Co3W9C4 , а укрупнение зерен карбидной фазы незначительно. Во-вторых, в ЗЛВ недопустимо появление трещин произвольного масштаба, то есть термические напряжения, возникающие в результате ЛО, не должны превышать напряжений разрушения структурных элементов сплава. Расчет термических напряжений, возникающих в твердом сплаве при лазерной обработке в пределах одного карбидного зерна, выполняется в соответствии с законом Гука. Расчеты, выполненные как для однократной, так и для многократной обработки, позволяют установить, что для всех исследованных режимов при вариации плотности энергии лазерного излучения от 0,9 до 1,8 Дж/мм2 и кратности обработки от 1 до 10, когда температура на поверхности находится в диапазоне 1290 ‒ 1400 °С, термические напряжения в карбидной фазе меньше минимальных напряжений разрушения и не превосходят 80 МПа. Предложенный аналитический метод определения предельных энергетических характеристик позволяет установить режимы импульсной ЛО, которые обеспечивают дисперсионное упрочнение твердых сплавов вольфрамокобальтовой группы при отсутствии деструктивных изменений в ЗЛВ. Полученные данные о режимах бездефектной лазерной обработки хорошо согласуются с более ранними результатами измерений сигнала акустической эмиссии при обработке твердых сплавов (сплава ВК8).</p></abstract><trans-abstract xml:lang="en"><p>The considered analytical method for determining the optimal mode of hardening pulsed laser treatment (LT) of tungsten-cobalt hard alloys is based on the study of the patterns of temperature field formation during hardening of hard alloys, determination of thermal stresses occurring in the laser exposure zone (LEZ) during laser pulse treatment, and their comparison with the stresses of fracture of the alloy individual structural elements. The optimal modes of hardening LT of the alloys of WC group are considered to be modes that meet two criteria. First, the temperature on the LEZ surface should be in the range of 1290 °C &lt; T &lt; 1400 °C, when the alloy does not contain weakening it phases of the η-Co3W3C, θ-Co3W2C, or χ-Co3W9C4 types, and increase in grain size of the carbide phase is insignificant. Secondly, cracks of an arbitrary scale are unaccep­table in the LEZ, that is, the thermal stresses resulting from the fracture should not exceed the stresses of fracture of the alloy structural elements. The calculation of thermal stresses occurring in a hard alloy during LT within a single carbide grain was carried out in accordance with the Hooke’s law. Calculations performed for both single and multiple treatments allow us to establish that for all the studied modes, with variations in the laser energy density from 0.9 to 1.8 J/mm2 and treatment multiplicity from 1 to 10, when the surface temperature is in the range of 1290 – 1400 °C, the thermal stresses in the carbide phase are lower than minimum fracture stresses and do not exceed 80 MPa. The proposed analytical method for determining the limiting energy characteristics makes it possible to establish pulsed LT modes that provide dispersion hardening of hard alloys of the WC group in the absence of destructive changes in the material. The data obtained on defect-free LT modes are in good agreement with the earlier results of measurements of acoustic emission signals during treatment of hard alloys (VK8 alloy).</p></trans-abstract><kwd-group xml:lang="ru"><kwd>лазерная импульсная обработка</kwd><kwd>вольфрамокобальтовый твердый сплав</kwd><kwd>трещиностойкость</kwd><kwd>температурное поле</kwd><kwd>термичес­кие напряжения</kwd><kwd>градиент температуры</kwd><kwd>карбидная фаза</kwd></kwd-group><kwd-group xml:lang="en"><kwd>laser pulse treatment</kwd><kwd>tungsten-cobalt hard alloy</kwd><kwd>crack resistance</kwd><kwd>temperature field</kwd><kwd>thermal stresses</kwd><kwd>temperature gradient</kwd><kwd>carbide phase</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">Лошак М.Г. Прочность и долговечность твердых сплавов. 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