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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">vsgiu</journal-id><journal-title-group><journal-title xml:lang="ru">Вестник Сибирского государственного индустриального университета</journal-title><trans-title-group xml:lang="en"><trans-title>Bulletin of the Siberian State Industrial University</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2304 - 4497</issn><issn pub-type="epub">2307-1710</issn><publisher><publisher-name>Федеральное государственное бюджетное образовательное учреждение высшего образования "Сибирский государственный индустриальный университет"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.57070/2304-4497-2026-2(56)-115-120</article-id><article-id custom-type="elpub" pub-id-type="custom">vsgiu-959</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>Раздел 2. Металлургия и материаловедение</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Section 2. Metallurgy and Materials Science</subject></subj-group></article-categories><title-group><article-title>ИССЛЕДОВАНИЕ ГЛУБИНЫ ОБЕЗУГЛЕРОЖЕННОГО СЛОЯ ПО ПЕРИМЕТРУ РЕЛЬСОВОГО ПРОФИЛЯ Р65</article-title><trans-title-group xml:lang="en"><trans-title>INVESTIGATION OF THE DEPTH OF THE DECARBONIZED LAYER ALONG THE PERIMETER OF THE P65 RAIL PROFILE</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>Пимахин</surname><given-names>Александр Васильевич</given-names></name><name name-style="western" xml:lang="en"><surname>Pimakhin</surname><given-names>Aleksandr V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>ведущий специалист по дополнительному профессиональному образованию Центра дополнительного профессионального образования</p></bio><bio xml:lang="en"><p>leading specialist in additional professional education at the Center for Additional Professional Education</p></bio><email xlink:type="simple">pimahin_av@sibsiu.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>Полевой</surname><given-names>Егор Владимирович</given-names></name><name name-style="western" xml:lang="en"><surname>Polevoy</surname><given-names>Egor V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>начальник научно-исследовательского центра</p></bio><bio xml:lang="en"><p>Head of the Scientific Research Center</p></bio><email xlink:type="simple">Egor.Polevoj@evraz.com</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Темлянцева</surname><given-names>Елена Николаевна</given-names></name><name name-style="western" xml:lang="en"><surname>Temlyantseva</surname><given-names>Elena N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>к.т.н., доцент, заведующий кафедрой теплоэнергетики и экологии</p></bio><bio xml:lang="en"><p>Cand. Sci. (Eng.), Assist. Prof., Acting Head of the Chair “Thermal Power and Ecology”</p></bio><email xlink:type="simple">elena.temlyantseva@yandex.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><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>филиал Западно-Сибирский металлургический комбинат ПАО «ЕВРАЗ»</institution><country>Russian Federation</country></aff><aff xml:lang="en"><institution>Branch of the West Siberian Metallurgical Combine of PJSC EVRAZ</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>30</day><month>06</month><year>2026</year></pub-date><volume>0</volume><issue>2</issue><fpage>115</fpage><lpage>120</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Пимахин А., Полевой Е., Темлянцева Е., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Пимахин А., Полевой Е., Темлянцева Е.</copyright-holder><copyright-holder xml:lang="en">Pimakhin A., Polevoy E., Temlyantseva E.</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://vestnik.sibsiu.ru/jour/article/view/959">https://vestnik.sibsiu.ru/jour/article/view/959</self-uri><abstract><p>Проведено металлографическое исследование распределения глубины видимого обезуглероженного слоя по периметру железнодорожных рельсов Р65, произведенных из непрерывнолитых заготовок сечением 300 × 360 мм из стали марки 76ХФ на универсальном рельсопрокатном стане. Установлено, что глубина видимого обезуглероженного слоя по периметру рельсового профиля распределена неравномерно, находится в интервале 45 – 184 мкм и изменяется фактически в 6 раз. В области поверхности катания головки рельсов глубина обезуглероженного слоя составляет всего 170 мкм. Наименьшая глубина обезуглероженного слоя характерна для выкружек, соединяющих подошву и шейку рельсового профиля (участки 12 и 24). Максимальная глубина обезуглероженного слоя 184 мкм соответствует участку 20, находящемуся в области перьев подошвы рельсового профиля. Сравнительный анализ полученных данных с результатами ранее выполненных работ для рельсов, полученных из непрерывнолитых заготовок (сталь марки Э76Ф) показывает, что в области снижения видимого обезуглероженного слоя в рельсовой продукции филиала Западно-Сибирского металлургического комбината ПАО «ЕВРАЗ» достигнут значительный прогресс. Техническое перевооружение предприятия обеспечило снижение максимальной глубины видимого обезуглероженного слоя по сечению рельсового профиля с 1000 до 184 мкм, при этом его среднее арифметическое значение по результатам замеров в 32 точках по периметру профиля снижено с 346 до 123 мкм, то есть в 2,8 раза. Неравномерность распределения глубины обезуглероженного слоя снижена с 33 до 6 (в 5,5 раз). </p></abstract><trans-abstract xml:lang="en"><p>A metallographic study of the depth distribution of the visible decarbonized layer along the perimeter of R65 railway rails made from continuously cast billets with a cross section of 300 × 360 mm made of 76XF steel on a universal rail rolling mill has been carried out. It was found that the depth of the visible decarbonized layer along the perimeter of the rail profile is unevenly distributed, is in the range of 45 ‒ 184 microns and actually varies by 6 times. In the area of the rolling surface of the rail head, the depth of the decarbonized layer is only 170 microns. The lowest depth of the decarbonized layer is typical for the cutouts connecting the sole and neck of the rail profile (sections 12 and 24). The maximum depth of the decarbonized layer of 184 microns corresponds to the area 20 located in the area of the feathers of the sole of the rail profile. A comparative analysis of the data obtained with the results of previously performed work for rails obtained from continuously cast billets (steel grade E76F) shows that significant progress has been made in reducing the visible decarbonized layer in rail products of the West Siberian Metallurgical Combine branch of PJSC EVRAZ. The technical re-equipment of the enterprise ensured a reduction in the maximum depth of the visible decarbonized layer along the cross-section of the rail profile from 1000 to 184 microns, while its arithmetic mean value according to the results of measurements at 32 points along the perimeter of the profile was reduced from 346 to 123 microns, that is, 2.8 times. The unevenness of the depth distribution of the decarbonized layer was reduced from 33 to 6 (5.5 times).</p></trans-abstract><kwd-group xml:lang="ru"><kwd>обезуглероженный слой</kwd><kwd>непрерывнолитая заготовка</kwd><kwd>рельсовая продукция</kwd><kwd>металлографическое исследование</kwd></kwd-group><kwd-group xml:lang="en"><kwd>decarbonized layer</kwd><kwd>continuously cast billet</kwd><kwd>rail products</kwd><kwd>metallographic study</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">Apiwat Muttamara, Jinnaphat Sommanat, Chaosuan Kanchanomai, Ekkarut Viyanit. Comparative fatigue performance of decarburized surfaces in railway rails. Materials. 2024;17(290):2–18.</mixed-citation><mixed-citation xml:lang="en">Apiwat Muttamara, Jinnaphat Sommanat, Chaosuan Kanchanomai, Ekkarut Viyanit. Comparative fatigue performance of decarburized surfaces in railway rails. 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