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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">10.17073/0368-0797-2020-2-155-162</article-id><article-id custom-type="elpub" pub-id-type="custom">blackmet-1849</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>ИННОВАЦИИ В МЕТАЛЛУРГИЧЕСКОМ ПРОМЫШЛЕННОМ И ЛАБОРАТОРНОМ ОБОРУДОВАНИИ, ТЕХНОЛОГИЯХ И МАТЕРИАЛАХ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>INNOVATIONS IN METALLURGICAL INDUSTRIAL AND LABORATORY EQUIPMENT, TECHNOLOGIES AND MATERIALS</subject></subj-group></article-categories><title-group><article-title>Влияние конструктивных особенностей плазмотрона на качество реза при прецизионной воздушно-плазменной разделке металла</article-title><trans-title-group xml:lang="en"><trans-title>Influence of plasma torch design on cutting quality during precision air-plasma cutting of metal</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>Анахов</surname><given-names>С. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Anakhov</surname><given-names>S. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>к.ф.-м.н., заведующий кафедрой математических и естественнонаучных дисциплин</p><p>620012, Екатеринбург, ул. Машиностроителей, 11</p></bio><bio xml:lang="en"><p>Cand. Sci. (Phys.–Math.), Head of the Chair of Mathematic and Natural Sciences</p><p>Ekaterinburg</p></bio><email xlink:type="simple">sergej.anahov@rsvpu.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>Гузанов</surname><given-names>Б. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Guzanov</surname><given-names>B. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>д.т.н., заведующий кафедрой инжиниринга и профессионального обучения в машиностроении и металлургии</p><p>620012, Екатеринбург, ул. Машиностроителей, 11</p></bio><bio xml:lang="en"><p>Dr. Sci. (Eng.), Professor, Head of the Chair of Engineering and Vocational Training in Machinery and Metallurgy</p><p>Ekaterinburg</p></bio><email xlink:type="simple">boris.guzanov@rsvpu.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>Матушкин</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Matushkin</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>к.т.н., старший преподаватель кафедры технологии сварочного производства</p><p>620002, Екатеринбург, ул. Мира, 19</p></bio><bio xml:lang="en"><p>Cand. Sci. (Eng.), Senior Lecturer of the Chair “Welding Technology”</p><p>Ekaterinburg</p></bio><email xlink:type="simple">227433@yandex.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>Пугачева</surname><given-names>Н. Б.</given-names></name><name name-style="western" xml:lang="en"><surname>Pugacheva</surname><given-names>N. B.</given-names></name></name-alternatives><bio xml:lang="ru"><p>д.т.н., главный научный сотрудник</p><p>620049, Екатеринбург, ул. Комсомольская, 34</p></bio><bio xml:lang="en"><p>Dr. Sci. (Eng.), Chief Researcher of the Laboratory of Materials Micromechanics</p><p>Ekaterinburg</p></bio><email xlink:type="simple">nat@imach.uran.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>Пыкин</surname><given-names>Ю. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Pykin</surname><given-names>Ya. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>д.т.н., профессор кафедры физико-химических технологий защиты биосферы</p><p>620032, Екатеринбург, ул. Сибирский тракт, 37</p></bio><bio xml:lang="en"><p>Dr. Sci. (Eng.), Professor of the Chair of Physical and Chemical Technologies in Biosphere Protection</p><p>Ekaterinburg</p></bio><email xlink:type="simple">yappoligon@mail.ru</email><xref ref-type="aff" rid="aff-4"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Российский государственный профессионально-педагогический университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Russian State Professional Pedagogical University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Уральский федеральный университет имени первого Президента России Б.Н. Ельцина</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Ural Federal University named after the first President of Russia B.N. Yeltsin</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Институт машиноведения УрО РАН (ИМАШ УрО РАН)</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Institute of Engineering Science, RAS (Ural Branch)</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-4"><aff xml:lang="ru"><institution>Уральский государственный лесотехнический университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Ural State Forest Engineering University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2020</year></pub-date><pub-date pub-type="epub"><day>29</day><month>04</month><year>2020</year></pub-date><volume>63</volume><issue>2</issue><fpage>155</fpage><lpage>162</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Анахов С.В., Гузанов Б.Н., Матушкин А.В., Пугачева Н.Б., Пыкин Ю.А., 2020</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="ru">Анахов С.В., Гузанов Б.Н., Матушкин А.В., Пугачева Н.Б., Пыкин Ю.А.</copyright-holder><copyright-holder xml:lang="en">Anakhov S.V., Guzanov B.N., Matushkin A.V., Pugacheva N.B., Pykin Y.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/1849">https://fermet.misis.ru/jour/article/view/1849</self-uri><abstract><p>Методами оптической интерферометрии и металлографического анализа исследована структура разделочных швов, полученных после резки стали марки 09Г2С плазмотронами типа ПМВР-5, имеющими ряд конструктивных особенностей в системе газодинамической стабилизации плазменной дуги. Показано, что применение новых плазмотронов позволяет получить более высокое качество реза на сталях 09Г2С средних толщин с высокой производительностью и меньшими энергетическими затратами. Металлографический анализ показал, что качественный состав структуры поверхности реза практически одинаков, поэтому приоритетным критерием для сравнительного анализа качества становятся характеристики микрогеометрии поверхности. Следует отметить, что оценка по этому параметру показывает высокое качество разделки практически по всей длине реза, так как влияние технологических особенностей вреза плазменной дуги в металл сказывается на расстоянии менее 0,3 мм от кромки листа. Применение дополнительных способов газодинамической стабилизации (симметрия подачи с двойной системой завихрения плазмообразующего газа) в плазматроне ПМВР-5.2 позволяет добиться дополнительных преимуществ по критерию качества поверхности по сравнению с плазмотроном ПМВР-5.1. Отмечен ряд особенностей, влияющих на качество реза при разделке металлов разных толщин под сварку в зависимости от угла наклона плазмотрона при резке. Оценки твердости поверхностного слоя свидетельствуют о минимальных отклонениях от требований СТО Газпром 2-2.2-136-2007 (Инструкция по технологиям сварки при строительстве и ремонте промысловых и магистральных газопроводов) по твердости зоны термического влияния не более 300 HV. Это позволяет использовать в дальнейшем полученные исследованными плазматронами разделочные швы под сварку без удаления зон термического влияния. Применение новых плазмотронов позволяет осуществлять прецизионную чистовую плазменную резку металлов, в том числе и в технологиях производства сварных соединений.</p></abstract><trans-abstract xml:lang="en"><p>Optical interferometry and metallographic analysis were used to study structure of cutting seams obtained after 09G2S steel cutting by PMVR-5 plasma torch. These plasma torches have a number of design features in the system of gas-dynamic stabilization of plasma arc. It is shown that application of new plasma torch allows obtaining higher quality of cutting 09G2S steel of medium thickness with high productivity and lower energy costs. Metallographic analysis has shown that qualitative composition of the cut surface structure is almost the same, so priority criteria for comparative quality analysis are parameters of surface microgeometry. Evaluation of this parameter shows high quality of cutting almost along the entire length of a cut, since the influence of technological features of plasma arc cut into the metal affects at a distance of less than 0.3 mm from the edge of the sheet. The use of additional methods of gas-dynamic stabilization in PMVR -5.2 plasma torch (feed symmetry with a double swirl system of plasma-forming gas) allows to achieve additional advantages in terms of surface quality compared to PMVR -5.1. A number of features that affects quality of cut when cutting metals of different thicknesses for welding, is noted depending on the angle of inclination of plasma torch during cutting. Estimates of the surface layer hardness indicate minimal deviations from the requirements of GAZPROM Standard 2-2.4-083 (instructions on welding technologies in the construction and repair of field and main gas pipelines), which allows further use of cutting seams obtained by studied plasma torches for welding without removing zones of thermal influence. Thus, application of new plasma torches makes possible precision finishing plasma cutting of metals, including production of welded joints.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>плазмотрон</kwd><kwd>проектирование</kwd><kwd>зона термического влияния</kwd><kwd>структурные превращения</kwd><kwd>дефекты</kwd><kwd>качество</kwd><kwd>эффективность</kwd></kwd-group><kwd-group xml:lang="en"><kwd>plasma torch</kwd><kwd>design</kwd><kwd>welding seems</kwd><kwd>heat-affected zone</kwd><kwd>structure transformation</kwd><kwd>defects</kwd><kwd>quality</kwd><kwd>efficiency</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">Nikou V. Welded repair and maintenance in the space environment. – Massachusetts Institute of Technology, 2003. – 113. р.</mixed-citation><mixed-citation xml:lang="en">Nikou V. Welded repair and maintenance in the space environment. 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