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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-2022-3-78-87</article-id><article-id custom-type="elpub" pub-id-type="custom">powder-718</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>Применение порошковых материалов и функциональных покрытий</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Application of Powder Materials and Functional Coatings</subject></subj-group></article-categories><title-group><article-title>Об опыте применения твердых сплавов в производстве буровых шарошечных долот в АО «Волгабурмаш»</article-title><trans-title-group xml:lang="en"><trans-title>About the experience of using hardmetals in the production of roller cone bits at Volgaburmash JSC</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>Жадяев</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Zhadyaev</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>аспирант кафедры «Металловедение, порошковая металлургия, наноматериалы»; вед. инженер-технолог</p><p>443100, г. Самара, ул. Молодогвардейская, 244</p><p>443004, г. Самара, ул. Грозненская, 1</p></bio><bio xml:lang="en"><p>Postgraduate student of the Department of metallurgy, powder metallurgy, nanomaterials; Leading process engineer</p><p>443100, Russia, Samara, Molodogvardeyskaya str., 244</p><p>443004, Russia, Samara, Groznenskaya str., 1</p></bio><email xlink:type="simple">alexander-zhadyaev@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>Захаров</surname><given-names>Д. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Zakharov</surname><given-names>D. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>канд. техн. наук, начальник цеха</p><p>г. Самара</p></bio><bio xml:lang="en"><p>Cand. Sci. (Eng.), Head of the shop</p><p>Samara</p></bio><email xlink:type="simple">zaharov.dmi@yandex.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Самарский государственный технический университет (СамГТУ); АО «Волгабурмаш»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Samara State Technical University; JSC «Volgaburmash»</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>АО «Волгабурмаш»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>JSC «Volgaburmash»</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>06</day><month>09</month><year>2022</year></pub-date><volume>0</volume><issue>3</issue><fpage>78</fpage><lpage>87</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; НИТУ "МИСИС", 2022</copyright-statement><copyright-year>2022</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/718">https://powder.misis.ru/jour/article/view/718</self-uri><abstract><p>С 2017 г. на предприятии АО ≪Волгабурмаш≫ (г. Самара, Россия) проводились мероприятия по испытанию покупных твердосплавных порошковых смесей состава 90%WC–10%Co и готовых твердосплавных зубков различных производителей. Работа велась с целью оценки возможности применения покупных изделий в качестве исходных материалов на предприятии для сокращения производственного цикла изготовления твердосплавного вооружения буровых шарошечных долот. Данные работы по товарозамещению (аутсорсингу) проводятся с целью возможного снижения себестоимости шарошечного долота и ускорения процесса его изготовления для функционирования предприятия в условиях острой рыночной конкуренции на внешнем и внутреннем рынках. Статья посвящена анализу и подробному сравнению микро- и макроструктуры, физических, механических, химических и технологических свойств покупных твердосплавных смесей и спеченных зубков различных производителей, в том числе и АО ≪Волгабурмаш≫. Определение всех характеристик исследуемых материалов проводилось в соответствии со стандартом предприятия СТП 582-17. Большое внимание уделено сравнению значений трещиностойкости сплавов, или вязкости разрушения по Палмквисту, и анализу снимков микроструктуры и характера распространения трещины после испытаний с использованием сканирующей электронной микроскопии. Также рассмотрены такие важные характеристики сплава, как твердость и предел прочности при поперечном изгибе. На основе результатов проведенных исследований представлены выводы о целесообразности использования в металлургическом цехе АО ≪Волгабурмаш≫ покупных твердых сплавов в сравнении с материалами собственного производства.</p></abstract><trans-abstract xml:lang="en"><p>Since 2017, Volgaburmash JSC (Samara, Russia) tested purchased 90%WC–10%Co carbide powder mixtures and finished carbide drill bits from various manufacturers. The work was carried out in order to check the possibility of using purchased products as raw materials at the plant to reduce the production cycle for the manufacture of carbide inserts for roller cone bits. This intercommodity substitution (outsourcing) is carried out with the aim of potential cone bit cost reduction and production process acceleration so that the plant can operate in the heavily competitive environment of foreign and domestic markets. The article focuses on the analysis and detailed comparison of the micro- and macrostructure, physical, mechanical, chemical and processing properties of purchased hard-alloy mixtures and sintered inserts of various manufacturers including Volgaburmash JSC. All properties of materials under study were determined in accordance with the VBM JSC company standard STP 582-17. Much attention is paid to comparing crack resistance or Palmqvist fracture toughness values of the alloy and analysis of microstructure images and fracture propagation pattern after using scanning electron microscopy tests. In addition, consideration is given to such important hard alloy properties as hardness and transverse bending strength. Based on the results of the conducted research, conclusions are presented on the expediency of using purchased hard-alloy materials at the Volgaburmash JSC metallurgical shop in comparison with internally manufactured materials.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>буровые шарошечные долота</kwd><kwd>вольфрамокобальтовые гранулированные смеси</kwd><kwd>твердые сплавы</kwd><kwd>зубки долот</kwd><kwd>структура</kwd><kwd>механические свойства</kwd><kwd>аутсорсинг</kwd></kwd-group><kwd-group xml:lang="en"><kwd>roller cone bits</kwd><kwd>tungsten-cobalt granular mixtures</kwd><kwd>hard alloys</kwd><kwd>bit inserts</kwd><kwd>structure</kwd><kwd>mechanical properties</kwd><kwd>outsourcing</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">Okada K., Osada A. Microstructural study on the grain growth inhibition of VC-doped WC—Co cemented carbides. Int. J. Refract. Met. 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