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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">powder</journal-id><journal-title-group><journal-title xml:lang="ru">Известия вузов. Порошковая металлургия и функциональные покрытия</journal-title><trans-title-group xml:lang="en"><trans-title>Powder Metallurgy аnd Functional Coatings (Izvestiya Vuzov. Poroshkovaya Metallurgiya i Funktsional'nye Pokrytiya)</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1997-308X</issn><issn pub-type="epub">2412-8767</issn><publisher><publisher-name>НИТУ "МИСИС"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.17073/1997-308X-2021-3-62-70</article-id><article-id custom-type="elpub" pub-id-type="custom">powder-617</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>Наноструктурированные материалы и функциональные покрытия</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Nanostructured Materials and Functional Coatings</subject></subj-group></article-categories><title-group><article-title>Применение разработанной методики оценки кавитационного воздействия для анализа эрозионной стойкости металлокерамических газотермических покрытий</article-title><trans-title-group xml:lang="en"><trans-title>Using the developed cavitation test to evaluate erosion resistance of cermet thermal sprayed coatings</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>Алван</surname><given-names>Х. Л.</given-names></name><name name-style="western" xml:lang="en"><surname>Alwan</surname><given-names>H. L.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Аспирант кафедры технологии сварочного производства</p><p>620002, г. Екатеринбург, ул. Мира, 19</p></bio><bio xml:lang="en"><p>Postgraduate student, Welding technology department</p><p>620002, Ekaterinburg, Mira str., 19</p></bio><email xlink:type="simple">lefta.hussam@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>Макаров</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Makarov</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Член-корреспондент РАН, доктор технических наук, зав. отделом материаловедения и лабораторией механических свойств</p><p>620108, г. Екатеринбург, ул. С. Ковалевской, 18</p></bio><bio xml:lang="en"><p>Dr. Sci. (Eng.), Corresponding member of Russian Academy of Sciences (RAS), Principal research scientist, Head of Materials science department</p><p>620108, Ekaterinburg, S. Kovalevskaya str., 18</p></bio><email xlink:type="simple">av-mak@yandex.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Соболева</surname><given-names>Н. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Soboleva</surname><given-names>N. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кандидат технических наук, ст. науч. сотрудник лаборатории конструкционного материаловедения ИМАШ УрО РАН, доцент кафедры технологии сварочного производства УрФУ</p><p>620049, г. Екатеринбург, ул. Комсомольская, 34</p></bio><bio xml:lang="en"><p>Cand. Sci. (Eng.), Senior research scientist, Laboratory of constructional material science, Institute of Engineering Science of the Ural Branch of RAS; Assistant prof., Welding technology department, UrFU</p><p>620049, Russia, Ekaterinburg, Komsomolskaya str., 34</p></bio><email xlink:type="simple">natashasoboleva@list.ru</email><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Коробов</surname><given-names>Ю. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Korobov</surname><given-names>Yu. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Доктор технических наук, главный научный сотрудник, заведующий лабораторией лазерной и плазменной обработки</p><p>620108, г. Екатеринбург, ул. С. Ковалевской, 18</p></bio><bio xml:lang="en"><p>Dr. Sci. (Eng.), Principal research scientist, Head of Laser/plasma treatment laboratory, IMP UB RAS</p><p>620108, Ekaterinburg, S. Kovalevskaya str., 18</p></bio><email xlink:type="simple">yukorobov@gmail.com</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Шумяков</surname><given-names>В. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Shumyakov</surname><given-names>V. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кандидат технических наук, доцент кафедры технологии сварочного производства</p><p>620002, г. Екатеринбург, ул. Мира, 19</p></bio><bio xml:lang="en"><p>Cand. Sci. (Eng.), Assistant prof., Welding technology department</p><p>620002, Ekaterinburg, Mira str., 19</p></bio><email xlink:type="simple">val29071@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>Лежнин</surname><given-names>Н. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Lezhnin</surname><given-names>N. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кандидат технических наук, старший научный сотрудник ИФМ УрО РАН</p><p>620108, г. Екатеринбург, ул. С. Ковалевской, 18</p></bio><bio xml:lang="en"><p>Cand. Sci. (Eng.), Senior research scientist, Mechanical properties laboratory</p><p>620108, Ekaterinburg, S. Kovalevskaya str., 18</p></bio><email xlink:type="simple">nlezhnin@bk.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Завалишин</surname><given-names>В. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Zavalishin</surname><given-names>V. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кандидат физико-математических наук, ведущий научный сотрудник ИФМ УрО РАН</p><p>620108, г. Екатеринбург, ул. С. Ковалевской, 18</p></bio><bio xml:lang="en"><p>Cand. Sci. (Phys.-Math.), Leading research scientist</p><p>620108, Ekaterinburg, S. Kovalevskaya str., 18</p></bio><email xlink:type="simple">zavali@imp.uran.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Уральский федеральный университет (УрФУ) имени первого Президента России Б.Н. Ельцина</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Ural Federal University named after the first President of Russia B.N. Yeltsin</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Институт физики металлов имени М.Н. Михеева (ИФМ) УрО РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>M.N. Mikheev Institute of Metal Physics of the Ural Branch of RAS</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Уральский федеральный университет (УрФУ) имени первого Президента России Б.Н. Ельцина;&#13;
Институт машиноведения (ИМАШ) УрО РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Ural Federal University named after the first President of Russia B.N. Yeltsin;&#13;
Institute of Engineering Science of the Ural Branch of RAS</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>17</day><month>09</month><year>2021</year></pub-date><volume>0</volume><issue>3</issue><fpage>62</fpage><lpage>70</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Алван Х.Л., Макаров А.В., Соболева Н.Н., Коробов Ю.С., Шумяков В.И., Лежнин Н.В., Завалишин В.А., 2021</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="ru">Алван Х.Л., Макаров А.В., Соболева Н.Н., Коробов Ю.С., Шумяков В.И., Лежнин Н.В., Завалишин В.А.</copyright-holder><copyright-holder xml:lang="en">Alwan H.L., Makarov A.V., Soboleva N.N., Korobov Y.S., Shumyakov V.I., Lezhnin N.V., Zavalishin V.A.</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://powder.misis.ru/jour/article/view/617">https://powder.misis.ru/jour/article/view/617</self-uri><abstract><p>Многие детали машин, работающие в контакте с быстротекущим потоком жидкостей (например, лопасти турбины гидростанций, клапаны, лопасти крыльчатки насосов, корабельные винты, системы охлаждения различных агрегатов и т.п.), подвергаются одному из видов износа – кавитационной эрозии. Исключение или уменьшение кавитационной эрозии является важной задачей, так как позволяет достичь большого экономического эффекта. В данном исследовании предложена разработанная и запатентованная методика для оценки стойкости металлокерамических газотермических покрытий (WC–10Co4Cr и WC–20CrC–7Ni) против кавитационной эрозии. Для получения металлокерамических покрытий использовался метод сверхзвукового газовоздушного напыления. Цель работы состояла в испытании новой методики оценки стойкости покрытий против кавитационного воздействия, которая отличается от стандартного метода расположением испытуемого образца относительно жидкости, используемой при испытании. Кроме того, проведен анализ структуры полученных покрытий в исходном состоянии перед испытаниями и изучено их поведение после кавитационного воздействия с применением растровой электронной микроскопии. Критерий потери объема материала в процессе кавитационного воздействия был использован для оценки стойкости покрытий. Результаты проведенных испытаний показали, что покрытие WC–20CrC–7Ni имеет несколько более высокую кавитационную стойкость по сравнению с составом WC–10Co4Cr, несмотря на его немного меньшую среднюю твердость (850±90 HV0,5 против 950±60 HV0,5). Исследование поверхности и поперечных сечений покрытий показало, что они характеризуются разными механизмами эрозионного разрушения. Можно сделать вывод, что наличие дефектов (пор) в структуре покрытий является основной причиной, способствующей снижению их стойкости против кавитационной эрозии. Таким образом, разработанная методика доказала свою эффективность при получении экспериментальных данных для анализа кавитационного износа металлокерамических газотермических покрытий.</p></abstract><trans-abstract xml:lang="en"><p>Many machinery parts working in contact with a fast-flowing fluid flow (e.g. turbine blades of hydroelectric power plants, valves, pump impeller blades, ship propellers, cooling systems for various units, etc.) are subjected to such type of wear as cavitation erosion. An important objective is to eliminate or reduce cavitation erosion so as to achieve a considerable economic effect. This research uses a patented technique developed to evaluate the cavitation erosion resistance of cermet thermal spray coatings (WC–10Co4Cr and WC–20CrC–7Ni). These coatings were prepared using high velocity air fuel thermal spraying (HVAF). The aim of this study is to test a new technique for evaluating coating cavitation resistance, which differs from the standard one by specimen positioning relative to the testing liquid. In addition, scanning electron microscopy (SEM) was used to analyze the initial structure of the coatings prepared and study their behavior after cavitation exposure. The material volume loss criterion during the cavitation test was used to evaluate the coating resistance. The results of cavitation tests showed that the WC–20CrC–7Ni coating has a somewhat higher cavitation resistance than that of WC–10Co4Cr despite its slightly lower average hardness (850±90 HV0.5 versus 950±60 HV0.5). The study of coating surfaces and cross-sections showed that they feature by different erosion mechanisms. It can be concluded that the presence of defects (pores) in the coating structure is the main reason for reducing their cavitation erosion resistance. Therefore, the developed technique proved effective in obtaining experimental data to analyze cermet thermal spray coatings for cavitation wear.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>кавитационная эрозия</kwd><kwd>ультразвуковое кавитационное испытание</kwd><kwd>WC–10Co4Cr</kwd><kwd>WC–20CrC–7Ni</kwd><kwd>металлокерамические покрытия</kwd><kwd>микроструктура</kwd><kwd>термическое напыление</kwd></kwd-group><kwd-group xml:lang="en"><kwd>cavitation erosion</kwd><kwd>ultrasonic cavitation test</kwd><kwd>WC–10Co4Cr</kwd><kwd>WC–20CrC–7Ni</kwd><kwd>cermet coatings</kwd><kwd>microstructure</kwd><kwd>thermal spraying</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена в рамках государственного задания ИМФ УрО РАН по темам № АААА-А18-118020190116-6, № АААА-А19-119070490049-8 и ИМАШ УрО РАН по теме № AAAA-A18-118020790147-4</funding-statement><funding-statement xml:lang="en">The research was conducted as part of the government task of the M.N. Mikheev Institute of Metal Physics of the Ural Branch of the Russian Academy of Sciences on Topics № АААА-А18-118020190116-6, № АААА-А19-119070490049-8 and the Institute of Engineering Science of the Ural Branch of RAS on Topic № AAAA-A18-118020790147-4</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Богачев И.Н. Кавитационное разрушение и кавитационно-стойкие сплавы. М.: Металлургия, 1972. Bogachev I.N. Cavitation damage and cavitation-resistant alloys. Moscow: Metallurgiya, 1972 (In Russ.).</mixed-citation><mixed-citation xml:lang="en">Богачев И.Н. Кавитационное разрушение и кавитационно-стойкие сплавы. М.: Металлургия, 1972. Bogachev I.N. Cavitation damage and cavitation-resistant alloys. 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