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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-2020-2-73-80</article-id><article-id custom-type="elpub" pub-id-type="custom">powder-542</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>Экспериментальное и расчетное определения коэффициента износостойкости покрытий с добавками нанодисперсных частиц карбидов при лазерной наплавке</article-title><trans-title-group xml:lang="en"><trans-title>Experimental determination and calculation of wear resistance coefficient for coatings with added nanodispersed carbide particles during laser deposition</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>Бирюков</surname><given-names>В. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Biryukov</surname><given-names>V. P.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кандидат технических наук, ведущий научный сотрудник лаборатории физических методов упрочнения поверхностей трения ИМАШ РАН.</p><p>101990, Москва, Малый Харитоньевский пер., 4.</p></bio><bio xml:lang="en"><p>Cand. Sci. (Tech.), Leading researcher, Laboratory of physical methods of friction surface hardening, IMASH RAN.</p><p>101990, Moscow, Maly Kharitonievsky per., 4.</p></bio><email xlink:type="simple">laser-52@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>Базлова</surname><given-names>Т. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Bazlova</surname><given-names>T. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кандидат технических наук, доцент кафедры литейных технологий и художественной обработки материалов НИТУ «МИСиС».</p><p>119049, Москва, Ленинский пр-т, 4.</p></bio><bio xml:lang="en"><p>Cand. Sci. (Tech.), Assistant prof., Department of casting technologies and artistic processing of materials, NUST «MISIS».</p><p>119049, Moskva, Leninskiy pr-t, 4.</p></bio><email xlink:type="simple">tbazlova@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт машиноведения им. А.А. Благонравова Российской академии наук (ИМАШ РАН)</institution><country>Россия</country></aff><aff xml:lang="en"><institution>IMASH RAN</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Институт машиноведения им. А.А. Благонравова Российской академии наук (ИМАШ РАН)</institution><country>Россия</country></aff><aff xml:lang="en"><institution>NUST «MISIS»</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2020</year></pub-date><pub-date pub-type="epub"><day>16</day><month>06</month><year>2020</year></pub-date><volume>0</volume><issue>2</issue><fpage>73</fpage><lpage>80</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Бирюков В.П., Базлова Т.А., 2020</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="ru">Бирюков В.П., Базлова Т.А.</copyright-holder><copyright-holder xml:lang="en">Biryukov V.P., Bazlova T.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/542">https://powder.misis.ru/jour/article/view/542</self-uri><abstract><p>Представлены результаты отечественных и зарубежных исследований по лазерной наплавке покрытий, содержащих упрочняющие карбидные фазы, а также металлографических и трибологических исследований покрытий порошками сплава системы Ni-Cr-B-Si, в том числе с добавлением нанодисперсных частиц карбидов титана и вольфрама. Определены значения коэффициента износостойкости (Ки) покрытий при испытании на абразивное изнашивание по схеме Бринелля-Хаворта. Использование Ки позволило определить коэффициент С при склерометрировании покрытий, зависящий от твердости покрытия, режимов обработки и добавки твердых частиц. Установлено, что на величину С влияет ряд факторов: скорость обработки, плотность подводимой мощности излучения лазера, глубина проплавления основы, наличие и содержание карбидной фазы. Чем выше глубина проплавления, тем ниже износостойкость покрытия, что связано с перемешиванием материала основы и наплавляемого покрытия. Введение наночастиц карбида вольфрама в количестве от 3 до 7 % позволило повысить износостойкость покрытия в 1,5-2,0 раза по сравнению с наплавленным порошковым покрытием из сплава ПР-НХ15СР2 и в 4,6-7,1 раза по отношению к материалу основы - стали 40Х. Микротвердость исходного порошкового покрытия составила 6400-6600 МПа, а с введением в него карбидов она возрастает. Так, при содержании WC 7 % в покрытии микротвердость достигает 7620-9160 МПа. Положительные результаты наплавки получены при плотности энергии излучения до 50 Вт•с/мм2, однако при дальнейшем ее увеличении происходят выгорание легирующих элементов и диссоциация карбидов.</p></abstract><trans-abstract xml:lang="en"><p>The paper presents the results of domestic and foreign studies on laser deposition of coatings using hardening carbide phases, as well as metallographic and tribological studies of coatings with Ni-Cr-B-Si alloy powders and with the addition of nanodispersed particles of titanium and tungsten carbides. Wear resistance coefficients of coatings (Kw) were determined in Brinell-Haworth abrasive wear tests. The Kw value was used in coating scratch tests to determine the coefficient С that depends on the coating hardness, treatment modes and addition of solid particles. It was found that the С value is influenced by a number of factors: processing speed, input laser power density, base penetration depth, carbide phase presence and content. The higher the penetration depth, the lower the coating wear resistance due to the mixing of the base material and the deposited coating. The introduction of tungsten carbide nanoparticles in the amount from 3 to 7 % increased the coating wear resistance by 1.5-2.0 times compared to the deposited PR-NiCr15BSi2 coating powder and by 4.6-7.1 times in relation to the base material - 40Cr steel. The microhardness of the initial powder coating was 6400-6600 MPa, and it increases with the introduction of carbides. For example, microhardness reaches 7620-9160 MPa at a WC content of 7 % in the coating. Positive deposition results were obtained at radiation energy density up to 50 W•s/mm2, but its further increase leads to the burnout of alloying elements and dissociation of carbides.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>лазерная наплавка</kwd><kwd>микротвердость</kwd><kwd>нанодисперсные частицы карбидов</kwd><kwd>коэффициент износостойкости</kwd></kwd-group><kwd-group xml:lang="en"><kwd>laser deposition</kwd><kwd>microhardness</kwd><kwd>nanodispersed particles of carbides</kwd><kwd>wear resistance coefficient</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">Li Q., Zhang D., Lei T., Chen Ch., Chen W. Comparison of laser-clad and furnace-melted Ni-based alloy microstructures. Surf. Coat. Technol. 2001. Vol. 137. P. 122— 135.</mixed-citation><mixed-citation xml:lang="en">Li Q., Zhang D., Lei T., Chen Ch., Chen W. 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