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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">cvmet</journal-id><journal-title-group><journal-title xml:lang="ru">Известия вузов. Цветная металлургия</journal-title><trans-title-group xml:lang="en"><trans-title>Izvestiya. Non-Ferrous Metallurgy</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0021-3438</issn><issn pub-type="epub">2412-8783</issn><publisher><publisher-name>НИТУ "МИСИС"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.17073/0021-3438-2019-4-30-39</article-id><article-id custom-type="elpub" pub-id-type="custom">cvmet-993</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>Металловедение и термическая обработка</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Physical Metallurgy and Heat Treatment</subject></subj-group></article-categories><title-group><article-title>Высокотемпературное ионное азотирование твердосплавных неперетачиваемых пластин марки Т15К6</article-title><trans-title-group xml:lang="en"><trans-title>High-temperature ion nitriding of T15K6 indexable carbide inserts</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>Богодухов</surname><given-names>С. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Bogodukhov</surname><given-names>S. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Доктор технических наук, профессор кафедры материаловедения и технологии материалов ОГУ.</p><p>460018, Оренбург, пр. Победы, 13</p></bio><bio xml:lang="en"><p>Dr. Sci. (Tech.), Prof., Department of materials science and technology materials, OSU.</p><p>460018, Orenburg, Pobeda ave., 13</p></bio><email xlink:type="simple">ogu@mailgate.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>Козик</surname><given-names>Е. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Kozik</surname><given-names>E. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кандидат технических наук, доцент кафедры материаловедения и технологии материалов ОГУ.</p><p>460018, Оренбург, пр. Победы, 13</p></bio><bio xml:lang="en"><p>Cand. Sci. (Tech.), Associate professor, Department of materials science and technology materials, OSU.</p><p>460018, Orenburg, Pobeda ave., 13</p></bio><email xlink:type="simple">ele57670823@yandex.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>Свиденко</surname><given-names>Е. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Svidenko</surname><given-names>E. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кандидат технических наук, преподаватель кафедры материаловедения и технологии материалов ОГУ.</p><p>460018, Оренбург, пр. Победы, 13</p></bio><bio xml:lang="en"><p>Cand. Sci. (Tech.), Lecturer, Department of materials science and technology materials, OSU.</p><p>460018, Orenburg, Pobeda ave., 13</p></bio><email xlink:type="simple">tzvetkova.katia2016@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Оренбургский государственный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Orenburg State University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2019</year></pub-date><pub-date pub-type="epub"><day>14</day><month>08</month><year>2019</year></pub-date><volume>0</volume><issue>4</issue><fpage>30</fpage><lpage>39</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Богодухов С.И., Козик Е.С., Свиденко Е.В., 2019</copyright-statement><copyright-year>2019</copyright-year><copyright-holder xml:lang="ru">Богодухов С.И., Козик Е.С., Свиденко Е.В.</copyright-holder><copyright-holder xml:lang="en">Bogodukhov S.I., Kozik E.S., Svidenko E.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://cvmet.misis.ru/jour/article/view/993">https://cvmet.misis.ru/jour/article/view/993</self-uri><abstract><p>Выполнено высокотемпературное (t = 800 °С) ионное азотирование (ИА) твердосплавных неперетачиваемых пластин марки Т15К6 с учетом формирования структуры, фазового состава и толщины поверхностного покрытия, обеспечивающее повышение их стойкости при испытании резанием. Выявлено, что после такой обработки значения твердости и микротвердости увеличиваются до 15 %, однако с повышением температуры более 600 °С они постепенно уменьшаются до исходных. Предел прочности при изгибе после ИА возрастает на 27 %. Фрактографии изломов поверхностных слоев твердого сплава Т15К6 после ионного азотирования в течение 1 и 2 ч при различных температурах свидетельствуют, что по краям излом характеризуется сильно разветвленной линейчатой структурой, а внутри материала наблюдается картина хрупкого излома. Результаты анализа микроструктур поверхностного слоя твердого сплава Т15К6 после ИА показали, что с повышением температуры ионного азотирования размеры карбидов-конгломератов в поверхностном слое уменьшаются. Глубина азотированного слоя сплава Т15К6 составляет от 1 до 7 мкм. Определены закономерности влияния различных временных и температурных режимов ионного азотирования на эксплуатационные характеристики изделий из титановольфрамовых твердых сплавов группы ТК. При температурах ионного азотирования 600, 700, 800 °С и длительности изотермической выдержки от 1 до 8 ч установлено повышение твердости, микротвердости и предела прочности при уменьшении износа в ходе резания твердосплавных неперетачиваемых пластин марки Т15К6. Установлено, что с увеличением длительности ионного азотирования площади участков межзеренного разрушения увеличиваются, а внутризеренного уменьшаются. Показано, что при ионном азотировании происходят формирование пересыщенного вольфрамом твердого раствора TixWx)(C1–yNy) и (Co1_xWx)(C1_yNy) и выделение трех- и четырехкомпонентных соединений в поверхностном слое.</p><p> </p></abstract><trans-abstract xml:lang="en"><p>High-temperature (t = 800 °С) ion nitriding of T15K6 indexable carbide inserts was carried out with regard to the structure formation, phase composition, surface coating thickness ensuring an increase in their durability during the cutting test. It was found that hardness and microhardness values increase to 15 % after ion nitriding, however, with a temperature increase of more than 600 °C they gradually decrease to their initial values. Flexural strength after ion nitriding increases by 27 %. The fractography of fractures in the T15K6 carbide surface layers after ion nitriding for 1 and 2 hours at different temperatures showed a very branched fracture structure on edges with a fragile pattern inside the material. The analysis of T15K6 carbide surface layer microstructures after ion nitriding showed that as the ion nitriding temperature increases, the size of conglomerate carbides in the surface layer decreases. The depth of the T15K6 nitrided layer is 1 to 7 pm. Certain regularities of the effect of various ion nitriding time and temperature conditions on the performance characteristics of products made of TK group titanium-tungsten alloys are determined. At 600, 700, 800 °C ion nitriding temperatures and 1 to 8 hours isothermal exposure time, the increase in hardness, microhardness and tensile strength with lower wear was found when cutting T15K6 indexable carbide inserts. It is determined that as the ion nitriding time increases, intergranular destruction areas expand, while the intragranular areas shrink. In case of ion nitriding, a solid solution (TixWx)(C1_yNy) and (Co1_xWx)(C1_yNy) supersaturated with tungsten is formed and three and four component compounds are released in the surface layer.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>твердосплавные неперетачиваемые пластины марки Т15К6</kwd><kwd>высокотемпературное ионное азотирование</kwd><kwd>образование новых фаз</kwd><kwd>износ при резании</kwd><kwd>рентгеноструктурный анализ</kwd></kwd-group><kwd-group xml:lang="en"><kwd>T15K6 indexable carbide inserts</kwd><kwd>high-temperature ion nitriding</kwd><kwd>formation of new phases</kwd><kwd>wear during cutting</kwd><kwd>X-ray analysis</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">Zhang Li., Wang Yuan-Jie., Yu Xian-Wang., Chen Shu., Xiong Xiang-Jin. Crack propagation characteristic and toughness of functionally graded WC—CO cemented carbide. Int. J. Refract. 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