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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">10.17073/0368-0797-2021-1-59-67</article-id><article-id custom-type="elpub" pub-id-type="custom">blackmet-2041</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>Процесс азотирования при получении порошка и исследование структуры сплава ЭП741НП, легированного азотом</article-title><trans-title-group xml:lang="en"><trans-title>Nitriding during powder production and study of the structure of EP741NP alloy doped with nitrogen</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7554-1467</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Католиков</surname><given-names>В. Д.</given-names></name><name name-style="western" xml:lang="en"><surname>Katolikov</surname><given-names>V. D.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Владимир Дмитриевич Католиков, аспирант кафедры металлургии стали, новых производственных технологий и защиты металлов</p><p>119049, Москва, Ленинский пр., 4</p></bio><bio xml:lang="en"><p>Vladimir D. Katolikov, Postgraduate of the Chair of Metallurgy of Steel, New Production Technologies and Metal Protection</p><p>4, Leninskii ave., Moscow 119049</p></bio><email xlink:type="simple">vdkatolikov@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/0000-0002-8216-1451</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Логачев</surname><given-names>И. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Logachev</surname><given-names>I. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Иван Александрович Логачев, к.т.н., ведущий инженер лаборатории гибридных аддитивных технологий</p><p>119049, Москва, Ленинский пр., 4</p></bio><bio xml:lang="en"><p>Ivan A. Logachev, Cand. Sci. (Eng.), Leading Engineer of the Laboratory of Hybrid Additive Technologies</p><p>4, Leninskii ave., Moscow 119049</p></bio><email xlink:type="simple">ivan@logachev.biz</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9517-8263</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Комолова</surname><given-names>О. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Komolova</surname><given-names>O. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ольга Александровна Комолова, к.т.н., доцент кафедры металлургии стали, новых производственных технологий и защиты металлов, Национальный исследовательский технологический университет «МИСиС», старший научный сотрудник лаборатории диагностики материалов, Институт металлургии и материаловедения имени А.А. Байкова РАН</p><p>119049, Москва, Ленинский пр., 4119991, Москва, Ленинский пр., 49 </p></bio><bio xml:lang="en"><p>Ol'ga A. Komolova, Cand. Sci. (Eng.), Assist. Prof. of the Chair of Metallurgy of Steel, New Production Technologies and Metal Protection, National University of Science and Technology "MISIS", Senior Researcher of the Laboratory of Materials Diagnostics, Baikov Institute of Metallurgy and Materials Science, RAS</p><p>4, Leninskii ave., Moscow 11904949, Leninskii ave., Moscow 119991 </p></bio><email xlink:type="simple">o.a.komolova@gmail.com</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3821-6790</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Железный</surname><given-names>М. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Zheleznyi</surname><given-names>M. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Марк Владимирович Железный, инженер-исследователь лаборатории диагностики материалов, Институт металлургии и материаловедения имени А.А. Байкова РАН, аспирант, Национальный исследовательский технологический университет «МИСиС»</p><p>119049, Москва, Ленинский пр., 4119991, Москва, Ленинский пр., 49 </p></bio><bio xml:lang="en"><p>Mark V. Zheleznyi, Research Engineer of the Laboratory of Materials Diagnostics, Baikov Institute of Metallurgy and Materials Science, RAS, Postgraduate, National University of Science and Technology "MISIS"</p><p>4, Leninskii ave., Moscow 11904949, Leninskii ave., Moscow 119991 </p></bio><email xlink:type="simple">markiron@mail.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/0000-0002-3287-5835</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Семин</surname><given-names>А. Е.</given-names></name><name name-style="western" xml:lang="en"><surname>Semin</surname><given-names>A. E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Александр Евгеньевич Семин, д.т.н., профессор кафедры металлургии стали, новых производственных технологий и защиты металлов</p><p>119049, Москва, Ленинский пр., 4</p></bio><bio xml:lang="en"><p>Aleksandr E. Semin, Dr. Sci. (Eng.), Prof. of the Chair of Metallurgy of Steel, New Production Technologies and Metal Protection</p><p>4, Leninskii ave., Moscow 119049</p></bio><email xlink:type="simple">asemin2007@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Национальный Исследовательский Технологический Университет «МИСиС»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>National University of Science and Technology "MISIS" (MISIS)</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Национальный Исследовательский Технологический Университет «МИСиС»; Институт металлургии и материаловедения имени А.А. Байкова РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>National University of Science and Technology "MISIS" (MISIS); Baikov Institute of Metallurgy and Materials Science, 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>16</day><month>02</month><year>2021</year></pub-date><volume>64</volume><issue>1</issue><fpage>59</fpage><lpage>67</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Католиков В.Д., Логачев И.А., Комолова О.А., Железный М.В., Семин А.Е., 2021</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="ru">Католиков В.Д., Логачев И.А., Комолова О.А., Железный М.В., Семин А.Е.</copyright-holder><copyright-holder xml:lang="en">Katolikov V.D., Logachev I.A., Komolova O.A., Zheleznyi M.V., Semin A.E.</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/2032">https://fermet.misis.ru/jour/article/view/2032</self-uri><abstract><p>Развитие современной техники лимитируется физико-механическими характеристиками выплавляемых сплавов, свойства которых зачастую определяются и повышаются за счет вводимых легирующих компонентов. К одному из легирующих элементов, весьма активно внедряемому в последние годы, следует отнести азот. Как правило, легирование азотом осуществляется ферросплавами, реже газообразным азотом, имеющим существенные преимущества. В процессах спецэлектрометаллургии легирование азотом можно проводить, используя, например, азотсодержащую плазму. Такой способ может быть осуществим и при получении порошкового металла за счет распыления заготовки азотсодержащей плазмой. Известно, что эксплуатационные свойства изделий из порошкового металла значительно выше, чем из литого. Это служило стимулом изучения свойств изделия, полученного из азотированного порошкового сплава ЭП741НП. В работе проведено исследование изменения химического, фазового состава, микроструктуры и микротвердости образцов сплава ЭП741НП. В качестве исследуемого материала использовались азотированные металлические порошки, изготовленные на установке плазменного центробежного распыления и слитки из гранул, полученные методом горячего изостатического прессования. Элементный состав полученных образцов определяли методом волнодисперсионной рентгенофлуоресцентной спектрометрии. С целью исследования микроструктуры металлопорошков и слитков использовали методы сканирующей электронной микроскопии с энергодисперсионным микроанализатором. Микротвердость изучаемых образцов определяли на микротвердомере методом Виккерса. Анализ газообразующих примесей проводили на газоанализаторе фирмы Leco модели Rhen-602 и TC-600. Показано, что азотирование жаропрочного никелевого сплава ЭП741НП возможно на стадии производства металлического порошка без существенной потери легирующих компонентов и резкого изменения химического состава. Отмечено повышение микротвердости полученных азотированных образцов в сравнении с исходным (литым) состоянием.</p></abstract><trans-abstract xml:lang="en"><p>The development of modern technics is limited by the physical and mechanical characteristics of the produced alloys, properties of which are often determined and enhanced by introduced alloying components. One of the alloying elements that have been very actively introduced in recent years is nitrogen. As a rule, alloying with nitrogen is carried out by ferroalloys, less often by gaseous nitrogen, which has significant advantages. In the processes of special electrometallurgy, alloying with nitrogen can be performed using, for example, nitrogen-containing plasma. Such a method may be feasible in the production of powder metal by spraying the ingot with nitrogen-containing plasma. It is known that performance properties of the products made of powder metal are significantly higher than those of cast metal. This served as a stimulus for investigating the properties of a product obtained from nitrided powder alloy EP741NP. In this work, a study of changes in the chemical composition, microstructure and microhardness of EP741NP alloy samples was carried out. The studied material was nitrided metal powders made on a plasma centrifugal spraying (PREP) unit and ingots from granules obtained by hot isostatic pressing (HIP). The chemical composition of the obtained samples was determined by wave dispersion X-ray fluorescence spectrometry. In order to study the microstructure of metal powders and ingots, the methods of scanning electron microscopy with EDXS were used. Microhardness of the samples was assessed using a microhardness tester by the Vickers method. The analysis of gas impurities was carried out on a gas analyzer. It is shown that nitriding of heat-resistant nickel alloy EP741NP is possible at the stage of metal powder production, without significant loss of alloying components and a sharp change in chemical composition. An increase in microhardness of the obtained nitrided samples was noted in comparison with the initial one.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>никелевые сплавы</kwd><kwd>азот</kwd><kwd>порошковая металлургия</kwd><kwd>плазменное центробежное распыление</kwd></kwd-group><kwd-group xml:lang="en"><kwd>nickel-base alloy</kwd><kwd>nitrogen</kwd><kwd>powder metallurgy</kwd><kwd>plasma centrifugal atomization</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">Kawagishi K., Sato A., Kobayashi T., Harada H. 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