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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-2022-3-37-44</article-id><article-id custom-type="elpub" pub-id-type="custom">powder-714</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>Зависимость свойств твердых сплавов WC–Co от их состава и характеристик микроструктуры</article-title><trans-title-group xml:lang="en"><trans-title>Properties of WC–Co hardmetals as a function of their composition and microstructural parameters</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>Песин</surname><given-names>В. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Pesin</surname><given-names>V. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>вед. специалист испытательной лаборатории № 1</p><p>194156, г. Санкт-Петербург, пр. Энгельса, 27 Р, оф. 1-Н</p></bio><bio xml:lang="en"><p>Lead expert, Testing laboratory № 1</p><p>194156, Russia, Saint-Petersburg, Engelsa pr., 27 R, of. 1-N</p></bio><email xlink:type="simple">PesinVA@virial.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>Осмаков</surname><given-names>А. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Osmakov</surname><given-names>A. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>канд. техн. наук, начальник лаборатории № 1</p><p>г. Санкт-Петербург</p></bio><bio xml:lang="en"><p>Cand. Sci. (Eng.), Head of testing laboratory № 1</p><p>Saint-Petersburg</p></bio><email xlink:type="simple">OsmakovAS@virial.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>Бойков</surname><given-names>С. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Boykov</surname><given-names>S. Yu.</given-names></name></name-alternatives><bio xml:lang="ru"><p>зам. начальника лаборатории № 1</p><p>г. Санкт-Петербург</p></bio><bio xml:lang="en"><p>Deputy head of testing laboratory № 1</p><p>Saint-Petersburg</p></bio><email xlink:type="simple">BoykovSY@virial.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ООО «Вириал»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>«Virial» LTD</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>37</fpage><lpage>44</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/714">https://powder.misis.ru/jour/article/view/714</self-uri><abstract><p>В ходе проведенных исследований субмикронных твердых сплавов системы WC–Co, включавших в себя диагностику твердости, коэрцитивной силы и параметров микроструктуры, а также анализ и сопоставление результатов из современных литературных источников, представлена объединенная модель, согласно которой выражение для твердости по Виккерсу можно представить в виде, позволяющем разделить влияние размера зерна карбида вольфрама и объемного содержания кобальтовой связки. Предложенное выражение дает возможность проводить перерасчет и сопоставлять значения HV для твердых сплавов с одинаковым средним размером зерна и различным содержанием связки. В работе показано, что в отличие от модели Ли-Герланда в рамках представляемой модели твердость сплава определяется твердостью карбидного каркаса (HWC) и его смежностью (C) и задается соотношением HV = CHWC. При этом величина HWC зависит только от размера зерна карбида вольфрама и описывается уравнением типа Холла–Петча. По результатам параллельных измерений твердости и коэрцитивной силы (Нс) получено эмпирическое уравнение зависимости величины Нс от размера зерна WC и объемного содержания Со. На основании всей совокупности экспериментальных данных исследованы связи коэрцитивной силы и твердости по Виккерсу и предложено упрощенное соотношение между этими физическими показателями, позволяющее проводить первичную экспрессную оценку величины HV по измеренным значениям коэрцитивной силы. В работе отмечается, что приведенные соотношения справедливы для относительно узкого распределения зерен WC по размерам с коэффициентом вариации не более 0,5.</p></abstract><trans-abstract xml:lang="en"><p>Research into WC–Co submicron hardmetals involving measurement of hardness, coercivity and microstructural characterization, as well as analysis and comparison of results from recent literature led to the development of a unified constitutive expression for Vickers hardness in a form that separates the effects of the tungsten carbide grain size from those of the cobalt binder volume fraction. With the proposed expression for HV one may recalculate and compare hardness values for hardmetals featuring the same average grain size but differing in the binder matrix content. The paper shows that, in contrast to the Lee-Gurland model, the proposed constitutive expression framework treats the hardmetal hardness as a function of the carbide skeleton hardness (HWC) and contiguity (C) described as HV = CHWC. The carbide skeleton hardness depends on the WC grain size only, and it is described by the Hall-Petch equation. The results of parallel hardness and coercivity measurements led to an empirical equation relating Hc to the WC grain size and the Co volume fraction. Based on the complete experimental data, the relationship between the coercivity and Vickers hardness was explored, and a simplified relationship between these physical values was proposed to carry out the primary HV evaluation based on the measured coercivity values. As noted in the paper, the above equations are valid for relatively narrow WC grain size distributions with a maximum coefficient of variation of 0.5.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>твердый сплав</kwd><kwd>микроструктура</kwd><kwd>твердость по Виккерсу</kwd><kwd>коэрцитивная сила</kwd><kwd>размер зерна</kwd><kwd>содержание связки</kwd><kwd>карбидный каркас</kwd><kwd>смежность</kwd></kwd-group><kwd-group xml:lang="en"><kwd>hardmetal</kwd><kwd>microstructure</kwd><kwd>Vickers hardness</kwd><kwd>coercivity</kwd><kwd>grain size</kwd><kwd>binder fraction</kwd><kwd>carbide skeleton</kwd><kwd>contiguity</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">Shatov A.V., Ponomarev S.S., Firstov S.A. Hardness and deformation of hardmetals at room temperature. In: Comprehensive hard materials (ed. Vinod K. Sarin). Oxford: Elsevier, 2014. P. 267—299.</mixed-citation><mixed-citation xml:lang="en">Shatov A.V., Ponomarev S.S., Firstov S.A. Hardness and deformation of hardmetals at room temperature. In: Comprehensive hard materials (ed. Vinod K. Sarin). Oxford: Elsevier, 2014. P. 267—299.</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Topić I., Sockel H., Göken M. The influence of microstructure on the magnetic properties of WC/Co hardmetals. Mater. Sci. Eng. A. 2006. Vol. 423. Iss. 1-2. P. 306—312. DOI:10.1016/J.MSEA.2006.02.018.</mixed-citation><mixed-citation xml:lang="en">Topić I., Sockel H., Göken M. The influence of microstructure on the magnetic properties of WC/Co hardmetals. Mater. Sci. Eng. A. 2006. Vol. 423. Iss. 1-2. P. 306—312. DOI:10.1016/J.MSEA.2006.02.018.</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Roebuck B. Extrapolating hardness-structure property maps in WC/Co hardmetals. Int. J. Refract. Met. Hard Mater. 2006. Vol. 24. Iss. 1. P. 101—108. DOI:10.1016/j.ijrmhm.2005.04.021.</mixed-citation><mixed-citation xml:lang="en">Roebuck B. Extrapolating hardness-structure property maps in WC/Co hardmetals. Int. J. Refract. Met. Hard Mater. 2006. Vol. 24. Iss. 1. P. 101—108. DOI:10.1016/j.ijrmhm.2005.04.021.</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Love A., Luyckx S., Sacks N. Quantitative relationships between magnetic properties, microstructure and composition of WC—Co alloys. J. Alloys Compd. 2010. Vol. 489. No. 2. P. 465—468. DOI:10.1016/j.jallcom.2009.09.087.</mixed-citation><mixed-citation xml:lang="en">Love A., Luyckx S., Sacks N. Quantitative relationships between magnetic properties, microstructure and composition of WC—Co alloys. J. Alloys Compd. 2010. Vol. 489. No. 2. P. 465—468. DOI:10.1016/j.jallcom.2009.09.087.</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Engqvist H., Jacobson S., Axén N. A model for the hardness of cemented carbides. Wear. 2002. Vol. 252. Iss. 5-6. P. 384—393. DOI:10.1016/S0043-1648(01)00866-3.</mixed-citation><mixed-citation xml:lang="en">Engqvist H., Jacobson S., Axén N. A model for the hardness of cemented carbides. Wear. 2002. Vol. 252. Iss. 5-6. P. 384—393. DOI:10.1016/S0043-1648(01)00866-3.</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">Kresse T., Meinhard D., Bernthaler T., Schneider G. Hardness of WC—Co hard metals: Preparation, quantitative microstructure analysis, structure-property relationship and modelling. Int. J. Refract. Met. Hard Mater. 2018. Vol. 75. P. 287—293. DOI:10.1016/j.ijrmhm.2018.05.003.</mixed-citation><mixed-citation xml:lang="en">Kresse T., Meinhard D., Bernthaler T., Schneider G. Hardness of WC—Co hard metals: Preparation, quantitative microstructure analysis, structure-property relationship and modelling. Int. J. Refract. Met. Hard Mater. 2018. Vol. 75. P. 287—293. DOI:10.1016/j.ijrmhm.2018.05.003.</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">Makhele-Lekala L., Luyckx S., Nabarro F.R.N. Semi-empirical relationship between the hardness, grain size and mean free path of WC—Co. Int. J. Refract. Met. Hard Mater. 2001. Vol. 19. Iss. 4-6. P. 245—249. DOI:10.1016/S0263-4368(01)00022-1.</mixed-citation><mixed-citation xml:lang="en">Makhele-Lekala L., Luyckx S., Nabarro F.R.N. Semi-empirical relationship between the hardness, grain size and mean free path of WC—Co. Int. J. Refract. Met. Hard Mater. 2001. Vol. 19. Iss. 4-6. P. 245—249. DOI:10.1016/S0263-4368(01)00022-1.</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">Golovchan V.T. Some analytical consequences of experimental data on properties of WC—Co hardmetals. Int. J. Refract. Met. Hard Mater. 2008. Vol. 26. Iss. 4. P. 301—305. DOI:10.1016/j.ijrmhm.2007.07.001.</mixed-citation><mixed-citation xml:lang="en">Golovchan V.T. Some analytical consequences of experimental data on properties of WC—Co hardmetals. Int. J. Refract. Met. Hard Mater. 2008. Vol. 26. Iss. 4. P. 301—305. DOI:10.1016/j.ijrmhm.2007.07.001.</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">Roebuck B. Terminology, testing, properties, imaging and models for fine grained hardmetals. Int. J. Refract. Met. Hard Mater. 1995. Vol. 13. Iss. 5. P. 265—279. DOI:10.1016/0263-4368(95)92673-8.</mixed-citation><mixed-citation xml:lang="en">Roebuck B. Terminology, testing, properties, imaging and models for fine grained hardmetals. Int. J. Refract. Met. Hard Mater. 1995. Vol. 13. Iss. 5. P. 265—279. DOI:10.1016/0263-4368(95)92673-8.</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">Tarrago J.M., Coureaux D., Torres Y., Jimenez-Pique E., Schneider L., Fair J., Llanes L. Strength and reliability of WC-Co cemented carbides: understanding microstructural effects on the basis of R-curve behavior and fractography. Int. J. Refract. Met. Hard Mater. 2018. Vol. 71. P. 221—226. DOI:10.1016/J.IJRMHM.2017.11.031.</mixed-citation><mixed-citation xml:lang="en">Tarrago J.M., Coureaux D., Torres Y., Jimenez-Pique E., Schneider L., Fair J., Llanes L. Strength and reliability of WC-Co cemented carbides: understanding microstructural effects on the basis of R-curve behavior and fractography. Int. J. Refract. Met. Hard Mater. 2018. Vol. 71. P. 221—226. DOI:10.1016/J.IJRMHM.2017.11.031.</mixed-citation></citation-alternatives></ref><ref id="cit11"><label>11</label><citation-alternatives><mixed-citation xml:lang="ru">Mingard K.P., Roebuck B., Bennett E.G., Gee M.G., Nordenstrom H., Sweetman G., Chan P. Comparison of EBSD and conventional methods of grain size measurement of hardmetals. Int. J. Refract. Met. Hard Mater. 2009. Vol. 27. Iss. 2. P. 213—223. DOI:10.1016/j.ijrmhm.2008.06.009.</mixed-citation><mixed-citation xml:lang="en">Mingard K.P., Roebuck B., Bennett E.G., Gee M.G., Nordenstrom H., Sweetman G., Chan P. Comparison of EBSD and conventional methods of grain size measurement of hardmetals. Int. J. Refract. Met. Hard Mater. 2009. Vol. 27. Iss. 2. P. 213—223. DOI:10.1016/j.ijrmhm.2008.06.009.</mixed-citation></citation-alternatives></ref><ref id="cit12"><label>12</label><citation-alternatives><mixed-citation xml:lang="ru">Roebuck B., Mingard K.P., Jones H., Bennett E.G. Aspects of the metrology of contiguity measurements in WC based hard materials. Int. J. Refract. Met. Hard Mater. 2017. Vol. 62. P. 161—169. DOI:10.1016/j.ijrmhm.2016.05.011.</mixed-citation><mixed-citation xml:lang="en">Roebuck B., Mingard K.P., Jones H., Bennett E.G. Aspects of the metrology of contiguity measurements in WC based hard materials. Int. J. Refract. Met. Hard Mater. 2017. Vol. 62. P. 161—169. DOI:10.1016/j.ijrmhm.2016.05.011.</mixed-citation></citation-alternatives></ref><ref id="cit13"><label>13</label><citation-alternatives><mixed-citation xml:lang="ru">Tarragó J.M., Coureaux D., Torres Y., Wua F., Al-Dawery I., Llanes L. Implementation of an effective time-saving twostage methodology for microstructural characterization of cemented carbides. Int. J. Refract. Met. Hard Mater. 2016. Vol. 55. P. 80—86. DOI:10.1016/j.ijrmhm.2015.10.006.</mixed-citation><mixed-citation xml:lang="en">Tarragó J.M., Coureaux D., Torres Y., Wua F., Al-Dawery I., Llanes L. Implementation of an effective time-saving twostage methodology for microstructural characterization of cemented carbides. Int. J. Refract. Met. Hard Mater. 2016. Vol. 55. P. 80—86. DOI:10.1016/j.ijrmhm.2015.10.006.</mixed-citation></citation-alternatives></ref><ref id="cit14"><label>14</label><citation-alternatives><mixed-citation xml:lang="ru">Vornberger A., Potschke J., Gestrich T., Herrmann M., Michaelis A. Influence of microstructure on hardness and thermal conductivity of hardmetals. Int. J. Refract. Met. Hard Mater. 2020. Vol. 88. Art. 105170. DOI:10.1016/j.ijrmhm.2019.105170.</mixed-citation><mixed-citation xml:lang="en">Vornberger A., Potschke J., Gestrich T., Herrmann M., Michaelis A. Influence of microstructure on hardness and thermal conductivity of hardmetals. Int. J. Refract. Met. Hard Mater. 2020. Vol. 88. Art. 105170. DOI:10.1016/j.ijrmhm.2019.105170.</mixed-citation></citation-alternatives></ref><ref id="cit15"><label>15</label><citation-alternatives><mixed-citation xml:lang="ru">Peng Y., Wang H., Zhao C., Hu H., Liu X., Song X. Nanocrystalline WC—Co composite with ultrahigh hardness and toughness. Composites Pt. B. 2020. Vol. 197. Art. 108161. DOI:10.1016/j.copositesb.2020.108161.</mixed-citation><mixed-citation xml:lang="en">Peng Y., Wang H., Zhao C., Hu H., Liu X., Song X. Nanocrystalline WC—Co composite with ultrahigh hardness and toughness. Composites Pt. B. 2020. Vol. 197. Art. 108161. DOI:10.1016/j.copositesb.2020.108161.</mixed-citation></citation-alternatives></ref><ref id="cit16"><label>16</label><citation-alternatives><mixed-citation xml:lang="ru">Lee H.C., Gurland J. Hardness and deformation of cemented tungsten carbides. Mater. Sci. Eng. 1978. Vol. 33. P. 125—133. DOI:10.1016/0025-5416(78)90163-5.</mixed-citation><mixed-citation xml:lang="en">Lee H.C., Gurland J. Hardness and deformation of cemented tungsten carbides. Mater. Sci. Eng. 1978. Vol. 33. P. 125—133. DOI:10.1016/0025-5416(78)90163-5.</mixed-citation></citation-alternatives></ref><ref id="cit17"><label>17</label><citation-alternatives><mixed-citation xml:lang="ru">Nino A., Takahashi K., Sugiyama S., Taimatsu H. Effects of carbon addition on microstructures and mechanical properties of binderless tungsten carbide. Mater. Trans. 2012. Vol. 53. Iss. 8. P. 1475—1480. DOI:10.2320/matertrans.M2012148.</mixed-citation><mixed-citation xml:lang="en">Nino A., Takahashi K., Sugiyama S., Taimatsu H. Effects of carbon addition on microstructures and mechanical properties of binderless tungsten carbide. Mater. Trans. 2012. Vol. 53. Iss. 8. P. 1475—1480. DOI:10.2320/matertrans.M2012148.</mixed-citation></citation-alternatives></ref><ref id="cit18"><label>18</label><citation-alternatives><mixed-citation xml:lang="ru">Nino A., Izu Y., Sekine T., Sugiyama S., Taimatsu H. Effects of TaC and TiC addition on microstructures and mechanical properties of binderless WC. Int. J. Refract. Met. Hard Mater. 2019. Vol. 82. P. 167—173. DOI:10.1016/j.ijrmhm.2019.04.012.</mixed-citation><mixed-citation xml:lang="en">Nino A., Izu Y., Sekine T., Sugiyama S., Taimatsu H. Effects of TaC and TiC addition on microstructures and mechanical properties of binderless WC. Int. J. Refract. Met. Hard Mater. 2019. Vol. 82. P. 167—173. DOI:10.1016/j.ijrmhm.2019.04.012.</mixed-citation></citation-alternatives></ref><ref id="cit19"><label>19</label><citation-alternatives><mixed-citation xml:lang="ru">Konyashin I., Zaitsev A.A., Sidorenko D., Levashov E.A., Ries B., Konischev S.N., Sorokin M., Mazilkin A.A., Herrmann M., Kaiser A. Wettability of tungsten carbide by liquid binders in WC—Co cemented carbides: Is it complete for all carbon contents? Int. J. Refract. Met. Hard Mater. 2017. Vol. 62. P. 134—148. DOI:10.1016/J.IJRMHM.2016.06.006.</mixed-citation><mixed-citation xml:lang="en">Konyashin I., Zaitsev A.A., Sidorenko D., Levashov E.A., Ries B., Konischev S.N., Sorokin M., Mazilkin A.A., Herrmann M., Kaiser A. Wettability of tungsten carbide by liquid binders in WC—Co cemented carbides: Is it complete for all carbon contents? Int. J. Refract. Met. Hard Mater. 2017. Vol. 62. P. 134—148. DOI:10.1016/J.IJRMHM.2016.06.006.</mixed-citation></citation-alternatives></ref><ref id="cit20"><label>20</label><citation-alternatives><mixed-citation xml:lang="ru">German Carbide. URL: https://german-carbide.com/en/ products-2/ (accessed: 30.03.2022). 21. Boehlerit. URL: https://www.boehlerit.com/en/ (accessed: 30.03.2022).</mixed-citation><mixed-citation xml:lang="en">German Carbide. URL: https://german-carbide.com/en/ products-2/ (accessed: 30.03.2022). 21. Boehlerit. URL: https://www.boehlerit.com/en/ (accessed: 30.03.2022).</mixed-citation></citation-alternatives></ref><ref id="cit21"><label>21</label><citation-alternatives><mixed-citation xml:lang="ru">Hyperion cemented carbide grades. URL: https://www.hyperionmt.com/products/Carbide-rods/productseries-grade/ (accessed: 17.12.2021).</mixed-citation><mixed-citation xml:lang="en">Hyperion cemented carbide grades. URL: https://www.hyperionmt.com/products/Carbide-rods/productseries-grade/ (accessed: 17.12.2021).</mixed-citation></citation-alternatives></ref><ref id="cit22"><label>22</label><citation-alternatives><mixed-citation xml:lang="ru">Ultra Carbide Grade Chart. URL: https://ultracarbide.com/ (accessed: 17.12.2021).</mixed-citation><mixed-citation xml:lang="en">Ultra Carbide Grade Chart. URL: https://ultracarbide.com/ (accessed: 17.12.2021).</mixed-citation></citation-alternatives></ref><ref id="cit23"><label>23</label><citation-alternatives><mixed-citation xml:lang="ru">Iscar. URL: https://www.iscar.com/ (accessed: 17.12.2021).</mixed-citation><mixed-citation xml:lang="en">Iscar. URL: https://www.iscar.com/ (accessed: 17.12.2021).</mixed-citation></citation-alternatives></ref><ref id="cit24"><label>24</label><citation-alternatives><mixed-citation xml:lang="ru">Gesac. URL: https://gesac.ru (accessed: 17.12.2021).</mixed-citation><mixed-citation xml:lang="en">Gesac. URL: https://gesac.ru (accessed: 17.12.2021).</mixed-citation></citation-alternatives></ref><ref id="cit25"><label>25</label><citation-alternatives><mixed-citation xml:lang="ru">Engqvist H., Uhrenius B. Determination of the average grain size of cemented carbides. Int. J. Refract. Met. Hard Mater. 2003. Vol. 21. Iss. 1. P. 31—35. DOI:10.1016/S0263-4368(03)00005-2.</mixed-citation><mixed-citation xml:lang="en">Engqvist H., Uhrenius B. Determination of the average grain size of cemented carbides. Int. J. Refract. Met. Hard Mater. 2003. Vol. 21. Iss. 1. P. 31—35. DOI:10.1016/S0263-4368(03)00005-2.</mixed-citation></citation-alternatives></ref></ref-list><fn-group><fn fn-type="conflict"><p>The authors declare that there are no conflicts of interest present.</p></fn></fn-group></back></article>
