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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">10.17073/0368-0797-2019-5-366-373</article-id><article-id custom-type="elpub" pub-id-type="custom">blackmet-1621</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>МЕТАЛЛУРГИЧЕСКИЕ ТЕХНОЛОГИИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>METALLURGICAL TECHNOLOGIES</subject></subj-group></article-categories><title-group><article-title>СТРУКТУРА И МЕХАНИЧЕСКИЕ СВОЙСТВА АУСТЕНИТНЫХ Cr – Ni – Ti СТАЛЕЙ ПОСЛЕ ВЫСОКОТЕМПЕРАТУРНОГО АЗОТИРОВАНИЯ</article-title><trans-title-group xml:lang="en"><trans-title>STRUCTURE AND MECHANICAL PROPERTIES OF AUSTENITIC Cr – Ni – Ti STEELS AFTER HIGH-TEMPERATURE NITRIDING</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>Рогачев</surname><given-names>С. О.</given-names></name><name name-style="western" xml:lang="en"><surname>Rogachev</surname><given-names>S. O.</given-names></name></name-alternatives><bio xml:lang="ru"><p>к.т.н., доцент кафедры металловедения и физики прочности</p><p>119049, Москва, Ленинский пр., 4</p></bio><bio xml:lang="en"><p>Cand. Sci. (Eng.), Assist. Professor of the Chair “Metallography and Physics of Strength” </p><p>Moscow</p></bio><email xlink:type="simple">csaap@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>Стомахин</surname><given-names>А. Я.</given-names></name><name name-style="western" xml:lang="en"><surname>Stomakhin</surname><given-names>A. Ya.</given-names></name></name-alternatives><bio xml:lang="ru"><p>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>Dr. Sci. (Eng.), Professor of the Chair of Metallurgy of Steel, New Production Technologies and Metal Protection</p><p>Moscow</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Никулин</surname><given-names>С. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Nikulin</surname><given-names>S. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>д.т.н, профессор, заведующий кафедрой металловедения и физики прочности</p><p>119049, Москва, Ленинский пр., 4</p></bio><bio xml:lang="en"><p>Dr. Sci. (Eng.), Professor, Head of the Chair “Metallography and Physics of Strength”</p><p>Moscow</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кадач</surname><given-names>М. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Kadach</surname><given-names>M. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>инженер</p><p>111116, Москва, ул. Авиамоторная, 2</p></bio><bio xml:lang="en"><p>Engineer</p><p>Moscow</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Хаткевич</surname><given-names>В. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Khatkevich</surname><given-names>V. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>к.т.н., младший научный сотрудник</p><p>119049, Москва, Ленинский пр., 4</p></bio><bio xml:lang="en"><p>Cand. Sci. (Eng.), Junior Researcher</p><p>Moscow</p></bio><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>Центральный институт авиационного моторостроения имени П.И. Баранова</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Central Institute of Aviation Motors (CIAM)</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2019</year></pub-date><pub-date pub-type="epub"><day>18</day><month>06</month><year>2019</year></pub-date><volume>62</volume><issue>5</issue><fpage>366</fpage><lpage>373</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Рогачев С.О., Стомахин А.Я., Никулин С.А., Кадач М.В., Хаткевич В.М., 2019</copyright-statement><copyright-year>2019</copyright-year><copyright-holder xml:lang="ru">Рогачев С.О., Стомахин А.Я., Никулин С.А., Кадач М.В., Хаткевич В.М.</copyright-holder><copyright-holder xml:lang="en">Rogachev S.O., Stomakhin A.Y., Nikulin S.A., Kadach M.V., Khatkevich V.M.</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/1621">https://fermet.misis.ru/jour/article/view/1621</self-uri><abstract><p> Легирование коррозионностойких аустенитных сталей азотом широко применяется в производстве для стабилизации аустенита, улучшения прочностных и других свойств металла. Возможность легирования азотом титансодержащих сталей путем ввода азота в расплав отсутствует, так как это вызывает образование в стали при разливке и кристаллизации металла грубых дефектов (заворотов корки, крупных нитридных включений, скоплений нитридов и др.). Альтернативой жидкофазному азотированию для легирования азотом аустенитных титансодержащих хромоникелевых сталей с целью повышения их прочностных свойств может служить метод высокотемпературного газового азотирования. В настоящей работе исследована возможность повышения прочностных характеристик тонколистовой аустенитной коррозионностойкой стали типа Х18Н12Т, содержащей 1,5 и 3 % титана, за счет применения твердофазного высокотемпературного азотирования. Азотирование осуществляли при температуре 1000 – 1100 °С в атмосфере чистого азота в течение 5 или 8 ч. Средняя массовая доля азота в образцах после азотирования в течение 5 ч составляла 0,6 и 0,7 % для сталей с 1,5 и 3 % титана соответственно, а после азотирования в течение 8 ч – 0,8 и 0,9 %. Показано, что высокотемпературное азотирование с отжигом обеспечивает значительное (в 2 – 3 раза) повышение прочностных характеристик металла по сравнению с состоянием до азотирования. Однако при этом происходит естественное понижение пластичности. В ходе конечной обработки пластичность восстанавливается. На стали типа Х18Н12Т с 1,5 % титана получено увеличение предела текучести в 3,3 раза (с 180 до 600 МПа) и предела прочности в 1,8 раз (с 540 до 970 МПа) при относительном удлинении на уровне 28 %. На стали с 3 % титана дополнительного увеличения прочностных характеристик не обнаружено. Полученные результаты показывают возможность получения тонколистовой титансодержащей высокоазотистой стали (или изделий из нее, например, тонкостенных труб) путем применения твердофазного высокотемпературного азотирования.</p></abstract><trans-abstract xml:lang="en"><p>Alloying of corrosion-resistant austenitic steels with nitrogen is widely used in production to stabilize austenite and to improve the strength and other properties of the metal. The possibility of alloying titanium-containing steels with nitrogen by introducing nitrogen into the melt is not possible, as it causes formation of the coarse defects in steel during casting and solidification of the metal (twisting of the peel, large nitride inclusions, accumulations of nitrides, etc.). The method of high-temperature gas nitriding can be alternative to liquid-phase nitriding for alloying austenitic titanium-containing chromium-nickel steels with nitrogen in order to increase their strength properties. In this work, we investigated the possibility of increasing the strength characteristics of thin-sheet austenitic corrosion-resistant Cr – Ni – Ti (Kh18N12T type) steel, containing 1.5 % and 3 % of titanium, through the use of solid-phase high-temperature nitriding. The nitriding was carried out at a temperature of 1000 – 1100 °С in an atmosphere of pure nitrogen for 5 or 8 hours. The average mass fraction of nitrogen in the samples after nitriding for 5 hours was 0.6 % and 0.7 % for the steels with 1.5 and 3 % of titanium, respectively, and after nitriding for 8 hours – 0.8 % and 0.9 %. It was shown that high-temperature nitriding followed by annealing provides a significant (by 2 – 3 times) increase in the metal strength characteristics compared with the state before nitriding, but reduces the ductility. Ductility of the steel is restored during final processing. For Kh18N12Т type steel with 1.5 % of titanium, an increase in the yield strength is obtained – by 3.3 times (from 180 to 600 MPa), strength – by 1.8 times (from 540 to 970 MPa), with a relative elongation of 28 %. An additional increase in strength properties was not found for the steel with 3 % titanium. The obtained results show the possibility of obtaining thin-sheet titanium-containing high-nitrogen steel (or products from it, for example, thin-walled pipes) by applying solid-phase high-temperature nitriding.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>высокотемпературное твердофазное азотирование</kwd><kwd>аустенитная Cr – Ni – Ti сталь</kwd><kwd>прокатка</kwd><kwd>механические свойства</kwd><kwd>микроструктура</kwd><kwd>фазовые превращения</kwd><kwd>нитриды</kwd></kwd-group><kwd-group xml:lang="en"><kwd>high-temperature solid-phase nitriding</kwd><kwd>austenitic Cr – Ni – Ti steel</kwd><kwd>rolling</kwd><kwd>mechanical properties</kwd><kwd>microstructure</kwd><kwd>phase transformations</kwd><kwd>nitrides</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Исследования методом просвечивающей электронной микроскопии проведены с использованием оборудования ЦКП «Материаловедение и металлургия» НИТУ «МИСиС». Авторы выражают благодарность М.В. Морозову за помощь в получении результатов исследований.</funding-statement><funding-statement xml:lang="en">TEM studies were carried out using the equipment of the CCP “Materials Science and Metallurgy” of NUST “MISiS”. The authors are grateful to M.V. Morozov for his help in obtaining the research results.</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">Гаврилюк В.Г. Физические основы азотистых сталей // Перспективные материалы. Т. II: Конструкционные материалы и методы управления их качеством. – Тольятти: ТГУ, – М.: МИСиС, 2007. С. 5 – 74.</mixed-citation><mixed-citation xml:lang="en">Gavrilyuk V.G. Fizicheskie osnovy azotistykh stalei. Perspektivnye materialy. T. II: Konstruktsionnye materialy i metody upravleniya ikh kachestvom [Physical basis of nitrogen steels. Prospective materials. 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