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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-2020-3-4-16</article-id><article-id custom-type="elpub" pub-id-type="custom">powder-560</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>Процессы получения и свойства порошков</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Production Processes and Properties of Powders</subject></subj-group></article-categories><title-group><article-title>Создание ультрамелкозернистого твердого сплава WC-15Co из порошка, полученного электроэрозионным диспергированием отходов сплава ВК15 в воде</article-title><trans-title-group xml:lang="en"><trans-title>Production of WC-15Co ultrafine-grained hard alloy from powder obtained by VK15 alloy waste spark erosion in water</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>Дворник</surname><given-names>М. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Dvornik</surname><given-names>M. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Дворник М.И. – канд. техн. наук, ст. науч. сотрудник лаборатории порошковой металлургии</p><p>680042, г. Хабаровск, ул. Тихоокеанская, 153</p></bio><bio xml:lang="en"><p>Dvornik M.I. - Cand. Sci. (Eng.), Senior research scientist, Powder metallurgy laboratory</p><p>680042, Russia, Khabarovsk, Tikhookeanskaya str., 153</p></bio><email xlink:type="simple">maxxxx80@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>Михайленко</surname><given-names>Е. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Mikhailenko</surname><given-names>E. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Михайленко Е.А. – канд. физ.-мат. наук, ученый секретарь</p><p>680042, г. Хабаровск, ул. Тихоокеанская, 153</p></bio><bio xml:lang="en"><p>Mikhailenko Е.А. - Cand. Sci. (Phys.-Math), Scientific secretary</p><p>680042, Russia, Khabarovsk, Tikhookeanskaya str., 153</p></bio><email xlink:type="simple">mea80@list.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт материаловедения Хабаровского научного центра (ИМ ХНЦ) ДВО РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Institute of Materials Science of Far Eastern Branch of the Russian Academy of Sciences (IM FEB RAS)</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2020</year></pub-date><pub-date pub-type="epub"><day>15</day><month>11</month><year>2020</year></pub-date><volume>0</volume><issue>3</issue><fpage>4</fpage><lpage>16</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; НИТУ "МИСИС", 2020</copyright-statement><copyright-year>2020</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/560">https://powder.misis.ru/jour/article/view/560</self-uri><abstract><p>Проведено исследование возможности производства ультрамелкозернистого твердого сплава WC-15Co из порошка, полученного электроэрозионным диспергированием (ЭЭД) отходов твердого сплава ВК15 в воде. В результате ЭЭД сплава в кислородсодержащей жидкости концентрация углерода в образующемся порошке снижается с 5,3 до 2,3 %. При нагреве порошка до температуры 900 °C в вакууме содержание углерода падает до 0,2 % из-за наличия кислорода. Полученный порошок включает фазы WC, W2C и Co. Частицы имеют дендритную структуру, состоящую из вновь сформированных вльфрамсодержащих зерен и кобальтовых прослоек. В ходе работы проведено контролируемое удаление кислорода и восполнение углерода в образовавшемся порошке при нагреве в атмосфере CO до t = 900 °C. Прошедший обработку порошок имеет необходимый фазовый состав (WC + Co) и содержит 5,3 % углерода. Частицы после восполнения углерода сохраняют сферическую форму. Зерна WC в частицах приобретают пластинчатую конфигурацию, пространство между которыми заполнено кобальтом. Средний диаметр зерен оказался меньше, чем в исходном сплаве. В результате спекания полученного порошка в вакууме при температуре 1390 °C получен ультрамелкозернистый твердый сплав WC-15Co, средний диаметр зерен WC в котором составил 0,44 мкм, что в несколько раз меньше, чем в исходном сплаве (1,8 мкм). При этом большинство зерен сохраняют пластинчатую форму. За счет мелкозернистости и 15%-ного содержания кобальта полученный сплав имеет высокие показатели твердости (1620 HV), трещиностойкости (13,2 МПа·м1/2) и прочности (1920 МПа). По совокупности характеристик этот материал не уступает аналогам, полученным другими методами.</p></abstract><trans-abstract xml:lang="en"><p>The study covers the possibility of WC-15Co ultrafine cemented carbide production from powder obtained by spark erosion (SE) of VK15 cemented carbide waste in water. As a result of SE in an oxygen-containing liquid (H2O), the carbon content in the resulting powder decreases from 5.3 to 2.3 %. When the powder is heated to 900 °C in vacuum, the carbon content decreases to 0.2 % due to the presence of oxygen. The powder obtained consists of WC, W2C and Co phases. Particles have a dendritic structure consisting of newly formed tungsten-containing grains and cobalt interlayers. The controlled removal of oxygen and carbon replenishment in the resulting powder were carried out by heating in the CO atmosphere to t = = 900 °C. The processed powder has a required phase composition (WC + Co) and carbon content (5.3 %). Particles retain their spherical shape after carbon replenishment. WC grains in particles become plate-shaped with the space between them filled with cobalt. The average grain diameter is smaller than in the initial alloy. The vacuum sintering of the resulting powder at 1390 °C made it possible to obtain WC–15Co ultrafine-grained cemented carbide with an average WC grain diameter of 0.44 μm. It is several times smaller than the average grain diameter in the initial alloy (1.8 μm). Most grains retain their plate shape. The resulting alloy combines high hardness (1620 HV), increased fracture toughness (13.2 MPa·m1/2) and strength (1920 MPa) due to its fine-grain structure and 15 % cobalt content. In terms of the set of its properties, this alloy is not inferior to analogues obtained by other methods.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>ультрамелкозернистый твердый сплав</kwd><kwd>электроэрозионное диспергирование</kwd><kwd>дефицит углерода</kwd><kwd>спекание</kwd><kwd>твердость</kwd></kwd-group><kwd-group xml:lang="en"><kwd>ultrafine cemented carbide</kwd><kwd>spark erosion</kwd><kwd>carbon deficiency</kwd><kwd>sintering</kwd><kwd>hardness</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">Панов В.С., Чувилин А.М. 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