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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-2019-1-52-60</article-id><article-id custom-type="elpub" pub-id-type="custom">powder-429</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>Тугоплавкие, керамические и композиционные материалы</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Refractory, Ceramic, and Composite Materials</subject></subj-group></article-categories><title-group><article-title>Исследование влияния дисперсности и гомогенности структуры на свойства порошковых метастабильных аустенитных карбидосталей и алмазного инструмента</article-title><trans-title-group xml:lang="en"><trans-title>Study of the effect of dispersion and homogeneity of the structure on the properties of powder metastable austenitic carbide steels and diamond tools</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>Оглезнева</surname><given-names>С. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Oglezneva</surname><given-names>S. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Докт. техн. наук, профессор кафедры «Материалы, технологии и конструирование машин» (МТиКМ).</p><p>614990, г. Пермь, Комсомольский пр-т, 29. </p></bio><bio xml:lang="en"><p>Dr. Sci (Tech.), prof. of the Department of materials, technologies and machine design.</p><p>614990, Perm, Komsomolskii pr., 29.</p></bio><email xlink:type="simple">osa@pm.pstu.ac.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>Саенков</surname><given-names>К. Л.</given-names></name><name name-style="western" xml:lang="en"><surname>Saenkov</surname><given-names>K. L.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Аспирант кафедры «Материалы, технологии и конструирование машин» (МТиКМ).</p><p>614990, г. Пермь, Комсомольский пр-т, 29. </p></bio><bio xml:lang="en"><p>Postgraduate student of the Department of materials, technologies and machine design.</p><p>614990, Perm, Komsomolskii pr., 29.</p></bio><email xlink:type="simple">severskl@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>Князев</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Knyazev</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Аспирант кафедры «Материалы, технологии и конструирование машин» (МТиКМ).</p><p>614990, г. Пермь, Комсомольский пр-т, 29. </p></bio><bio xml:lang="en"><p>Postgraduate student of the Department of materials, technologies and machine design.</p><p>614990, Perm, Komsomolskii pr., 29.</p></bio><email xlink:type="simple">andrey_knyazev_95@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Пермский национальный исследовательский политехнический университет (ПНИПУ).</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Perm National Research Polytechnic University (PNRPU).</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2019</year></pub-date><pub-date pub-type="epub"><day>21</day><month>03</month><year>2019</year></pub-date><volume>0</volume><issue>1</issue><fpage>52</fpage><lpage>60</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/429">https://powder.misis.ru/jour/article/view/429</self-uri><abstract><p>Исследованы процессы диффузии и гомогенизации в порошковых системах различной степени дисперсности «железо (5 мкм) – никель (5 мкм или 50 нм)» при спекании (900 и 1000 °С), а также искровом плазменном спекании с использованием метода Матано–Больцмана. Вычисленные коэффициенты диффузии в парах из микронных порошков, спеченных без приложения давления (900 °С, 6 ч) и искровым плазменным методом (900 °С, 5 мин), в этих системах были равны 7·10–10 см2/с. Показано, что в диффузионных парах на основе микродисперсного порошка железа использование нанодисперсного порошка никеля способствует повышению коэффициента диффузии при температуре 900 °С в 2 раза, в отличие от пары с микродисперсным порошком никеля. Рассчитаны константы в уравнении кинетики спекания В.А. Ивенсена для порошковых систем «железо–никель», по которым установлены факторы, активирующие спекание данных систем. Определены зависимости структурно-фазового состава и физико-механических свойств карбидосталей системы Fe(осн.)– 14мас.%Ni–8мас.%TiC от температуры спекания в интервале t = 900÷1200 °С, дисперсности и гомогенности структуры. Показаны зависимости размера зерна, пористости, твердости, микротвердости, ударной вязкости, предела прочности на изгиб от температуры спекания. Установленные зависимости триботехнических свойств от степени гомогенности твердого раствора и объема фазового превращения метастабильного аустенита в мартенсит деформации при трении по абразиву оказались аналогичны для карбидосталей и алмазного инструмента на основе карбидостали. Оптимальные значения коэффициента вариации концентрации никеля в аустените в карбидосталях одинакового химического состава, но различной степени дисперсности, обеспечивающие максимальный объем распада аустенита и высокие значения коэффициента шлифования алмазного инструмента, оказались равными 5 в обеих системах, но параметры спекания различались. Показано, что физико-механические свойства исследованных систем зависят от пористости и дисперсности структуры, а триботехнические – от гомогенности структуры сталей.</p></abstract><trans-abstract xml:lang="en"><p>Diffusion and homogenization in powder systems of varying degrees of dispersion «iron (5 μm) – nickel (5 μm or 50 nm)» during sintering (900 and 1000 °C), as well as spark plasma sintering using the Matano-Boltzmann method were studied. In these systems, the calculated diffusion coefficients in pairs of micron powders, sintered without application of pressure (900 °C, 6 h) and the spark plasma method (900 °C, 5 min), were equal to 7·10–10 cm2/s. It is shown that in diffusion pairs based on microdispersed iron powder, the use of nanodispersed nickel powder instead of microdispersed one contributes to an increase in the diffusion coefficient at a temperature of 900 °C by a factor of 2. The constants in the sintering kinetics equation of V.A. Ivensen are calculated for iron–nickel powder systems. Through them the factors activating the sintering of these systems were established. The dependences of the structure-phase composition and physicomechanical properties of carbides of the Fe (base) system — 14 wt.% Ni – 8 wt.% TiC system on the sintering temperature in the interval t = 900÷1200 °C, dispersion and homogeneity of the structure were determined. The dependences of grain size, porosity, hardness, microhardness, toughness, bending strength on sintering temperature are shown. The established dependences of the tribotechnical properties on the degree of homogeneity of the solid solution and the volume of the phase transformation of the metastable austenite to deformation martensite during friction on the abrasive were similar for carbide steels and diamond tools based on carbide steels. The optimal values of the coefficient of variation of nickel concentration in austenite in carbidostils of the same chemical composition, but different dispersion, providing the maximum amount of austenite decomposition and high values of the diamond tool grinding coefficient were 5 in both systems, but the sintering parameters differed. It is shown that the physicomechanical properties of the studied systems depend on the porosity and dispersion of the structure, and the tribotechnical properties are subjected to the homogeneity of the structure of the steel.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>порошковые карбидостали</kwd><kwd>алмазный инструмент</kwd><kwd>микро- и нанодисперсные порошки</kwd><kwd>никель</kwd><kwd>карбид титана</kwd><kwd>коэффициент диффузии</kwd><kwd>энергия активации</kwd><kwd>концентрационная неоднородность</kwd><kwd>метастабильный аустенит</kwd><kwd>мартенсит деформации</kwd><kwd>структура</kwd><kwd>свойства</kwd><kwd>коэффициент шлифования</kwd></kwd-group><kwd-group xml:lang="en"><kwd>powdered carbide steels</kwd><kwd>diamond tools</kwd><kwd>micro- and nano-dispersed powders</kwd><kwd>nickel</kwd><kwd>titanium carbide</kwd><kwd>diffusion coefficient</kwd><kwd>activation energy</kwd><kwd>concentration inhomogeneity</kwd><kwd>metastable austenite</kwd><kwd>deformation martensite</kwd><kwd>structure</kwd><kwd>properties</kwd><kwd>grinding ratio</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">Schwartz M. 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