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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-2019-2-68-74</article-id><article-id custom-type="elpub" pub-id-type="custom">powder-448</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>Исследование процессов диффузионного отжига сталей с многослойным Ni–Al-покрытием</article-title><trans-title-group xml:lang="en"><trans-title>Investigation of diffusion annealing processes of steels with multi-layer Ni–Al coating</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>Ковтунов</surname><given-names>А. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Kovtunov</surname><given-names>A. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Доктор технических наук, профессор кафедры сварки, обработки материалов давлением и родственных процессов</p><p>445020, г. Тольятти, ул. Белорусская, 14</p></bio><bio xml:lang="en"><p>Dr. Sci. (Tech.), Prof., Department «Welding, metal forming and related processes»</p><p>445020, Russia, Togliatti, Belorusskaya str., 14</p></bio><email xlink:type="simple">akovtunov@rambler.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>Острянко</surname><given-names>А. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Ostryanko</surname><given-names>A. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Магистрант кафедры сварки, обработки материалов давлением и родственных процессов</p><p>445020, г. Тольятти, ул. Белорусская, 14</p><p> </p></bio><bio xml:lang="en"><p>Master’s student, Department «Welding, metal forming and related processes»</p><p>445020, Russia, Togliatti, Belorusskaya str., 14</p></bio><email xlink:type="simple">ostryankoam@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>Шашкин</surname><given-names>О. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Shashkin</surname><given-names>О. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кандидат технических наук, доцент кафедры сварки, обработки материалов давлением и родственных процессов</p><p>445020, г. Тольятти, ул. Белорусская, 14</p></bio><bio xml:lang="en"><p>Cand. Sci. (Tech.), Prof., Department «Welding, metal forming and related processes»</p><p>445020, Russia, Togliatti, Belorusskaya str., 14</p></bio><email xlink:type="simple">oleg@tltsu.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>Семистенова</surname><given-names>Т. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Semistenova</surname><given-names>Т. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кандидат технических наук, доцент кафедры управления промышленной и экологической безопасностью</p><p>445020, г. Тольятти, ул. Белорусская, 14</p></bio><bio xml:lang="en"><p> Cand. Sci. (Tech.), Prof., Department «Management of industrial and environmental safety»</p><p>445020, Russia, Togliatti, Belorusskaya str., 14</p></bio><email xlink:type="simple">tatyana_717@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Тольяттинский государственный университет (ТГУ)</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Togliatti 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>19</day><month>06</month><year>2019</year></pub-date><volume>0</volume><issue>2</issue><fpage>68</fpage><lpage>74</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; НИТУ "МИСИС", 2019</copyright-statement><copyright-year>2019</copyright-year><copyright-holder xml:lang="ru">НИТУ "МИСИС"</copyright-holder><copyright-holder xml:lang="en">НИТУ "МИСИС"</copyright-holder><license xlink:href="https://powder.misis.ru/jour/about/submissions#copyrightNotice" xlink:type="simple"><license-p>https://powder.misis.ru/jour/about/submissions#copyrightNotice</license-p></license></permissions><self-uri xlink:href="https://powder.misis.ru/jour/article/view/448">https://powder.misis.ru/jour/article/view/448</self-uri><abstract><p>Интерметаллиды системы Ni–Al обладают высокой жаростойкостью, в связи с чем широко применяются в качестве покрытий для стальных деталей, работающих в условиях высоких температур. Для формирования таких покрытий предложен метод жидкофазного алюминирования предварительно никелированных стальных образцов с последующим диффузионным отжигом. Жидкофазное алюминирование позволяет сформировать на стали с никелевым покрытием второй алюминиевый слой, а диффузионный отжиг обеспечивает формирование покрытия на основе интерметаллидов Ni–Al. Диффузионный отжиг (t = 650÷850 °C, τ = 1, 2 и 5 ч) проводили на образцах, алюминированных при 750 °С. Установлено, что предлагаемая технология позволяет формировать поверхностные интерметаллидные слои, толщина которых определяется температурой и временем отжига: при t = 650÷800 °С и τ = 1÷5 ч формируется в основном слой Ni2Al3 толщиной до 50– 140 мкм, при t = 850 °С и τ = 5 ч образуются слои интерметаллидов NiAl и Ni3Al, обладающих наиболее высокой жаростойкостью. Исследования жаростойкости полученных покрытий показали, что за счет формирования на поверхности жаростойкого слоя NiAl образец не разрушается при температуре испытаний 750 °С в течение 300 ч. </p></abstract><trans-abstract xml:lang="en"><p>Ni–Al intermetallics have high heat resistance and therefore they are used as coatings for steel parts running under high temperature conditions. A method for liquid-phase aluminizing of preliminary nickel-plated steel samples followed by diffusion annealing was offered to form such coatings. Liquid-phase aluminizing can form the second aluminum layer on the nickel-plated steel and diffusion annealing provides formation of a coating based on Ni–Al intermetallics. Diffusion annealing (t = 650÷850 °C, τ = 1, 2 and 5 hours) was done at samples coated with aluminum at 750 °С. It was found that the technology offered ensures forming surface intermetallic layers with a thickness depending on the temperature and time of annealing. Annealing at 650÷800 °С during 1÷5 hours provides forming mainly up to 50–140 μm thick Ni2Al3 layer, while NiAl and Ni3Al layers featuring the highest heat resistance are formed at 850 °С during 5 hours. The heat resistance of these coatings showed that due to refractory NiAl layer formation on the surface, the sample resists to failure at a testing temperature of 750 °С during 300 hours.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>алюминиды никеля</kwd><kwd>алюминий</kwd><kwd>жаростойкое покрытие</kwd><kwd>диффузионный отжиг</kwd><kwd>интерметаллидные сплавы</kwd></kwd-group><kwd-group xml:lang="en"><kwd>nickel aluminides</kwd><kwd>aluminum</kwd><kwd>heat-resistant coating</kwd><kwd>diffusion annealing</kwd><kwd>intermetallics</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена при финансовой поддержке Российского фонда фундаментальных исследований в рамках реализации проекта № 17-48-630361</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">Колачев Б.А., Елагин В.И., Ливанов В.А. 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