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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">blackmet</journal-id><journal-title-group><journal-title xml:lang="ru">Известия высших учебных заведений. Черная Металлургия</journal-title><trans-title-group xml:lang="en"><trans-title>Izvestiya. Ferrous Metallurgy</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0368-0797</issn><issn pub-type="epub">2410-2091</issn><publisher><publisher-name>National University of Science and Technology "MISIS"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.17073/0368-0797-2023-4-421-426</article-id><article-id custom-type="elpub" pub-id-type="custom">blackmet-2578</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>МАТЕРИАЛОВЕДЕНИЕ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>MATERIAL SCIENCE</subject></subj-group></article-categories><title-group><article-title>Исследование влияния режимов комбинированной электромеханической обработки стали марки 40Х на ее структуру и твердость</article-title><trans-title-group xml:lang="en"><trans-title>Influence of combined electromechanical processing modes of 40Kh steel on its structure and hardness</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-9712-3757</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Симачёв</surname><given-names>А. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Simachev</surname><given-names>A. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Артем Сергеевич Симачёв, к.т.н. доцент кафедры обработки металлов давлением и металловедения. ЕВРАЗ ЗСМК</p><p>Россия, 654007, Кемеровская обл. – Кузбасс, Новокузнецк, ул. Кирова, 42</p></bio><bio xml:lang="en"><p>Artem S. Simachev, Cand. Sci. (Eng.), Assist. Prof. of the Chair “Metal Forming and Metal Science. “EVRAZ ZSMK”</p><p>42 Kirova Str., Novokuznetsk, Kemerovo Region – Kuzbass 654007, Russian Federation</p></bio><email xlink:type="simple">simachev_as@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1310-1284</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Осколкова</surname><given-names>Т. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Oskolkova</surname><given-names>T. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Татьяна Николаевна Осколкова, д.т.н., профессор кафедры обработки металлов давлением и металловедения. ЕВРАЗ ЗСМК</p><p>Россия, 654007, Кемеровская обл. – Кузбасс, Новокузнецк, ул. Кирова, 42</p></bio><bio xml:lang="en"><p>Tat’yana N. Oskolkova, Dr. Sci. (Eng.), Prof. of the Chair “Metal Forming and Metal Science. “EVRAZ ZSMK”</p><p>42 Kirova Str., Novokuznetsk, Kemerovo Region – Kuzbass 654007, Russian Federation</p></bio><email xlink:type="simple">oskolkovatatiana@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>Шевченко</surname><given-names>Р. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Shevchenko</surname><given-names>R. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Роман Алексеевич Шевченко, к.т.н., доцент кафедры металлургии черных металлов</p><p>Россия, 654007, Кемеровская обл. – Кузбасс, Новокузнецк, ул. Кирова, 42</p></bio><bio xml:lang="en"><p>Roman A. Shevchenko, Cand. Sci. (Eng.), Assist. Prof. of the Chair of Ferrous Metallurgy</p><p>42 Kirova Str., Novokuznetsk, Kemerovo Region – Kuzbass 654007, Russian Federation</p></bio><email xlink:type="simple">shefn1200@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Сибирский государственный индустриальный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Siberian State Industrial University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>17</day><month>08</month><year>2023</year></pub-date><volume>66</volume><issue>4</issue><fpage>421</fpage><lpage>426</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Симачёв А.С., Осколкова Т.Н., Шевченко Р.А., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Симачёв А.С., Осколкова Т.Н., Шевченко Р.А.</copyright-holder><copyright-holder xml:lang="en">Simachev A.S., Oskolkova T.N., Shevchenko R.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://fermet.misis.ru/jour/article/view/2578">https://fermet.misis.ru/jour/article/view/2578</self-uri><abstract><p>В работе рассмотрено влияние комбинированной электромеханической обработки по трем различным режимам на структуру и твердость поверхностных слоев стали марки 40Х в нормализованном состоянии (исходная структура). Режимы отличаются друг от друга разной приложенной нагрузкой и количеством импульсов. Приложенная нагрузка по режимам 1 и 2 (сила тока 39 кА, время импульса 0,02 с, количество импульсов 1) составляет 100 и 250 МПа. Отличительной особенностью режима 3 по сравнению с режимом 2 является большее количество импульсов (два). Металлографически установлено, что во всех трех случаях формируется упрочненный поверхностный слой разной толщины (от 300 до 1200 мкм) с твердостью 593 – 598 HV, состоящий из двух зон (поверхностной зоны со структурой мелкоигольчатого мартенсита; переходной зоны, плавно переходящей в исходную феррито-перлитную структуру). Переходная зона (обработка по режиму 1) в своей структуре содержит мартенсит и феррит. Переходная зона (обработка по режиму 2) состоит из видманштеттовой структуры. Более существенная по толщине поверхностная зона разогрева по этому режиму (700 мкм) по сравнению с обработкой по режиму 1 (300 мкм) в сочетании и интенсивным отводом тепла поспособствовали формированию видманштеттовой структуры, которая является дефектной и недопустимой для эксплуатации. Переходная зона при обработке по режиму 3 имеет структуру мартенсит и феррит. Формирования дефектной видманштеттовой структуры в переходной зоне не происходит, поскольку при обработке применяется в два раза больше импульсов, чем по режиму 2. Это способствует прогреву поверхностного слоя на большую глубину (1200 мкм), и, следовательно, структурообразование в переходной зоне происходит из межкритического интервала Аr3 – Аr1 .</p></abstract><trans-abstract xml:lang="en"><p>The paper considers the effect of combined electromechanical processing in three different modes on the structure and hardness of the surface layers of 40Kh steel, which was in a normalized state (the original structure). The modes differ from each other by the different applied load and the number of pulses. The applied load in modes 1 and 2 (current strength 39 kA, pulse time 0.02 s, number of pulses 1) is 100 and 250 MPa, respectively. A distinctive feature of mode 3 compared to mode 2 is a greater number of pulses (two). Metallographically it was established that in all three cases a hardened surface layer of different thickness (from 300 to 1200 μm) with a hardness of 593 – 598 HV is formed, consisting of two zones (a surface zone with a structure of fine-needle martensite; a transition zone smoothly transitioning into the initial ferrite structure). The transition zone (treatment according to mode 1) in its structure contains martensite and ferrite. The transition zone (mode 2 processing) consists of a Widemannstett structure. A more substantial surface heating zone according to this mode (700 μm) in comparison with the processing according to mode 1 (300 μm) in combination with intensive heat removal contributed to the formation of a Widmanstett structure, which is defective and unacceptable for operation. The transition zone with the processing according to mode 3 has the structure of martensite and ferrite. The formation of a defective Widmanstett structure in the transition zone does not occur, since 2 times more pulses are used during processing than in mode 2. This contributes to the heating of the surface layer to a greater depth (1200 μm), and, consequently, the structure formation in the transition zone occurs from the intercritical interval Ag3 – Ag1 .</p></trans-abstract><kwd-group xml:lang="ru"><kwd>сталь</kwd><kwd>твердость</kwd><kwd>микроструктура</kwd><kwd>поверхностная комбинированная электромеханическая обработка</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">Panin S.V., Klimenov V.A., Seifullina M.P., Pochivalov Yu.I., Ovechkin B.B. Effect of ultrasonic treatment of fused gas-thermal coatings on the character of deformation and fracture of “coating – substrate” compositions at three-point bending. Physical Mesomechanics. 2004;7(1-2):107–116.</mixed-citation><mixed-citation xml:lang="en">Panin S.V., Klimenov V.A., Seifullina M.P., Pochivalov Yu.I., Ovechkin B.B. 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