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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">10.17073/0368-0797-2017-6-457-462</article-id><article-id custom-type="elpub" pub-id-type="custom">blackmet-1098</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>СТРУКТУРНО-ФАЗОВЫЕ СОСТОЯНИЯ, МЕХАНИЧЕСКИЕ И ТРИБОЛОГИЧЕСКИЕ СВОЙСТВА ТЕРМОМЕХАНИЧЕСКИ УПРОЧНЕННОЙ БАЛКИ</article-title><trans-title-group xml:lang="en"><trans-title>STRUCTURE-PHASE STATES, MECHANICAL AND TRIBOLOGICAL PROPERTIES OF THERMOMECHANICALLY STRENGTHENED BEAM</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>Иванов</surname><given-names>Ю. Ф.</given-names></name><name name-style="western" xml:lang="en"><surname>Ivanov</surname><given-names>Yu. F.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Доктор физико-математических наук, профессор, главный научный сотрудник </p><p>(634055, Томск, пр. Академический, 2/3) </p></bio><bio xml:lang="en"><p>Dr. Sci. (Phys.-math.), Professor, Chief Researcher</p></bio><email xlink:type="simple">yufi55@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>Белов</surname><given-names>Е. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Belov</surname><given-names>E. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кандидат технических наук, начальник прокатного производства </p><p>(654043,  Кемеровская обл., Новокузнецк, шоссе Космическое, 16) </p></bio><bio xml:lang="en"><p>Cand. Sci. (Eng.), Head of Rolling Production</p></bio><email xlink:type="simple">belov_eg@zsmk.ru</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>Громов</surname><given-names>В. Е.</given-names></name><name name-style="western" xml:lang="en"><surname>Gromov</surname><given-names>V. E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Доктор физико-математических наук, профессор, заведующий кафедрой естественнонаучных дисциплин им. проф. В.М. Финкеля </p><p>(654007, Кемеровская обл., Новокузнецк, ул. Кирова, 42)</p></bio><bio xml:lang="en"><p>Dr. Sci. (Phys.-math.), Professor, Head of the Chair of Science named after V.M. Finkel</p></bio><email xlink:type="simple">gromov@physics.sibsiu.ru</email><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Коновалов</surname><given-names>С. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Konovalov</surname><given-names>S. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Доктор технических наук, профессор, заведующий кафедрой технологии металлов и авиационного материаловедения </p><p>(443086,  Самара, Московское шоссе, 34) </p><p> </p></bio><bio xml:lang="en"><p>Dr. Sci. (Eng.), Professor, Head of the Chair of Metals Technology and Aviation Materials</p></bio><email xlink:type="simple">ksv@ssau.ru</email><xref ref-type="aff" rid="aff-4"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Косинов</surname><given-names>Д. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Kosinov</surname><given-names>D. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кандидат технических наук, старший научный сотрудник УНИ </p><p>(654007, Кемеровская обл., Новокузнецк, ул. Кирова, 42) </p></bio><bio xml:lang="en"><p>Cand. Sci. (Eng.), Senior Researcher of the Department of Scientific Research</p></bio><email xlink:type="simple">kosinov.dima@rambler.ru</email><xref ref-type="aff" rid="aff-3"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт сильноточной электроники СО РАН; &#13;
Национальный исследовательский Томский политехнический университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Institute of High Current Electronics SB RAS; &#13;
National Research Tomsk Polytechnic University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>АО «ЕВРАЗ - Западно-Сибирский металлургический комбинат»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>JSC “EVRAZ – Joint West Siberian Metallurgical Plant”</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><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-4"><aff xml:lang="ru"><institution>Самарский национальный исследовательский университет им. академика С.П. Королева</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Samara National Research University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2017</year></pub-date><pub-date pub-type="epub"><day>02</day><month>07</month><year>2017</year></pub-date><volume>60</volume><issue>6</issue><fpage>457</fpage><lpage>462</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Иванов Ю.Ф., Белов Е.Г., Громов В.Е., Коновалов С.В., Косинов Д.А., 2017</copyright-statement><copyright-year>2017</copyright-year><copyright-holder xml:lang="ru">Иванов Ю.Ф., Белов Е.Г., Громов В.Е., Коновалов С.В., Косинов Д.А.</copyright-holder><copyright-holder xml:lang="en">Ivanov Y.F., Belov E.G., Gromov V.E., Konovalov S.V., Kosinov D.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/1098">https://fermet.misis.ru/jour/article/view/1098</self-uri><abstract><p>Методами современного физического материаловедения выполнены исследования и проведен сравнительный анализ структурно-фазовых состояний, дислокационной субструктуры, механических и трибологических свойств поверхности полки термомеханически упрочненной и неупрочненной двутавровой балки ДП155 из малоуглеродистой стали 09Г2С, используемой для шахтных монорельсовых дорог. Установлено, что ускоренное охлаждение балки в линии сортового стана 450 АО «ЕВРАЗ – Западно-Сибирский металлургический комбинат» (скорость прокатки 6 м/с, давление воды на секции охлаждения полки 0,22 – 0,28 МПа, температура перед холодильником приблизительно 800 °С) формирует в поверхностном слое высокодефектную структуру, характеризующуюся более высокими (по отношению к неупрочненному состоянию) значениями твердости, износостойкости, скалярной плотности дислокаций. В нетермоупрочненном состоянии значение микротвердости образцов составляет 2,70 ± 0,33 ГПа, а модуль Юнга – 269,6 ± 27,1 ГПа. Термомеханическое упрочнение материала приводит к уменьшению его микротвердости до 3,30 ± 0,29 ГПа и к увеличению модуля Юнга до 228,2 ± 25,7 ГПа соответственно. Кроме того, установлено увеличение интервала значений микротвердости с 2,20 – 3,80 ГПа до 2,64 – 4,60 ГПа и уменьшение интервала значений модуля Юнга с 208,0 – 403,0 ГПа до 184,1 – 278,2 ГПа при термомеханическом упрочнении стали. Показано, что термомеханическое упрочнение стали приводит к увеличению износостойкости поверхностного слоя ~ 1,36 раза (скорость изнашивания изменяется с 5,3·10–5 до 2,9·10–5 мм3/Н·м) и увеличению коэффициента трения в 1,36 раз (c 0,36 до 0,49). В нетермоупрочненном состоянии наблюдается структура дислокационного хаоса (cкалярная плотность дислокаций – (0,9 ÷ 1,0)·1010 см–2). Высокотемпературная прокатка и последующее ускоренное охлаждение образцов приводят к формированию полосовой дислокационной субструктуры в зернах феррита и сетчатой дислокационной субструктуры в зернах мартенсита (cредняя скалярная плотность дислокаций в поверхностном слое – 4,5·1010 см–2). Обсуждены возможные причины наблюдаемых закономерностей. </p></abstract><trans-abstract xml:lang="en"><p>Using the methods of modern materials science the researches and the comparative analysis are performed for the structural and phase states, dislocation substructure, mechanical and tribological properties of the surface of the thermo-mechanically strengthened and non-strengthened I-beam DP155 from low carbon steel used for mine monorails. It was found that accelerated cooling of the beam section in line 450 of the mill at “EVRAZ – Consolidated West-Siberian Metallurgical Plant” (rolling speed is 6 m/s, the water pressure on the sections of shelf cooling is 0.22 – 0.28 MPa, the temperature before the refrigerator is approximately 800 °С) forms a high defect surface layer structure characterized by higher (relatively to the unhardened state) values of hardness, wear resistance and scalar dislocation density. In the non-heat-resistant state, the microhardness of the samples is 2.70 ± 0.33 GPa, and Young’s modulus is 269.6 ± 27.1 GPa. Thermo-mechanical hardening of the material leads to a decrease in its microhardness up to 3.30 ± 0.29 GPa and to an increase in the Young’s modulus up to 228.2 ± 25.7 GPa, respectively. In addition, an increase in the range of microhardness values from 2.20 – 3.80 GPa to 2.64 – 4.60 GPa and a decrease in the Young’s modulus range from 208.0 to 403.0 GPa to 184.1 to 278.2 GPa is established during thermomechanical hardening of steel. It is shown that the thermomechanical strengthening of steel leads to an increase in the wear resistance of the surface layer in approximately 1.36 times (the wear rate varies from 5.3·10–5 mm3/N·m  to 2.9·10–5 mm3/N·m) and an increase in the friction coefficient by 1.36 times (from 0.36 to 0.49). In the non-strengthened state the dislocation chaos structure is observed (the dislocation scalar density is (0.9 . 1.0)·1010 cm–2). High-temperature rolling and subsequent accelerated cooling of the samples lead to the formation of a strip dislocation substructure in the grains of ferrite and a reticular dislocation substructure in martensite grains (the average scalar dislocation density in the surface layer is 4.5·1010 cm–2). The possible reasons for the observed regularities are discussed. </p></trans-abstract><kwd-group xml:lang="ru"><kwd>термомеханическое упрочнение</kwd><kwd>двутавровая балка</kwd><kwd>структура</kwd><kwd>дислокационная субструктура</kwd><kwd>трибологические свойства</kwd></kwd-group><kwd-group xml:lang="en"><kwd>thermomechanical strengthening</kwd><kwd>I-beam</kwd><kwd>structure</kwd><kwd>dislocation substructure</kwd><kwd>tribological properties</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Российский фонд фундаментальных исследований  (грант N 16-48-420530 р_а и 16-32-60048 мол_а_дк и госзадание (проект № 3.1283.2017/ПЧ)</funding-statement><funding-statement xml:lang="en">RFBR grants no. 16-48-420530 r_a and no.16-32-60048 mole_a_dk and state assignments (project no. 3.1283.2017/PСh)</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Rethinam A., Shivakumar V.D., Harish L. etc. Grain refinement of C-Mn steel through thermo-mechanical processing // Journal of Engineering, Design and Technology. 2015. 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