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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">10.17073/0368-0797-2017-4-292-297</article-id><article-id custom-type="elpub" pub-id-type="custom">blackmet-1074</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>МЕТОДИКА ОПРЕДЕЛЕНИЯ ОПТИМАЛЬНОЙ КОНЦЕНТРАЦИИ НАНОСТРУКТУРИРОВАННЫХ ПОРОШКОВ В ЗАЩИТНОМ ГАЗЕ</article-title><trans-title-group xml:lang="en"><trans-title>METHOD OF DETERMINING THE OPTIMAL CONCENTRATION OF NANOSTRUCTURED POWDERS IN SHIELDING GAS</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>Баранникова</surname><given-names>С. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Barannikova</surname><given-names>S. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>д.ф.-м.н., ведущий научный сотрудник, профессор кафедры механики деформируемого твердого тела и строительной механики</p></bio><bio xml:lang="en"><p>Dr. Sci. (Eng.), Leading Researcher, Professor of the Chair “Mechanics of Strained Solids and Construction Mechanics”</p></bio><email xlink:type="simple">bsa@ispms.tsc.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>Шляхова</surname><given-names>Г. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Shlyakhova</surname><given-names>G. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>к.т.н., научный сотрудник</p></bio><bio xml:lang="en"><p>Cand. Sci. (Eng.), Research Associate</p></bio><email xlink:type="simple">shgv@ispms.tsc.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>Зернин</surname><given-names>Е. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Zernin</surname><given-names>E. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>к.т.н., доцент, заведующий кафедрой cварочного производства</p></bio><bio xml:lang="en"><p>Cand. Sci. (Eng.), Assist. Professor, Head of the Chair of Welding Production</p></bio><email xlink:type="simple">yuti_sp@bk.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>Кузнецов</surname><given-names>М. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Kuznetsov</surname><given-names>M. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>старший преподаватель кафедры cварочного производства</p></bio><bio xml:lang="en"><p>Senior Lecturer of the Chair of Welding Production</p></bio><email xlink:type="simple">kyznechik_85@mail.ru</email><xref ref-type="aff" rid="aff-3"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Национальный исследовательский Томский государственный университет&#13;
Институт физики прочности и материаловедения СО РАН&#13;
Томский государственный архитектурно-строительный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>National Research Tomsk State University, Tomsk&#13;
Institute of Strength Physics and Materials Science SB RAS, Tomsk&#13;
Tomsk State University of Architecture and Building, Tomsk</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Институт физики прочности и материаловедения СО РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Institute of Strength Physics and Materials Science SB RAS, Tomsk</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Юргинский технологический институт (филиал) Национального исследовательского Томского политехнического университета</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Yurga Technological Institute of National Research Tomsk Polytechnic&#13;
University, Yurga</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2017</year></pub-date><pub-date pub-type="epub"><day>27</day><month>05</month><year>2017</year></pub-date><volume>60</volume><issue>4</issue><fpage>292</fpage><lpage>297</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Баранникова С.А., Шляхова Г.В., Зернин Е.А., Кузнецов М.А., 2017</copyright-statement><copyright-year>2017</copyright-year><copyright-holder xml:lang="ru">Баранникова С.А., Шляхова Г.В., Зернин Е.А., Кузнецов М.А.</copyright-holder><copyright-holder xml:lang="en">Barannikova S.A., Shlyakhova G.V., Zernin E.A., Kuznetsov M.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/1074">https://fermet.misis.ru/jour/article/view/1074</self-uri><abstract><p>Проведены теоретические и экспериментальные исследования по определению оптимальной концентрации наноструктурированных порошков в защитном газе. Задача настоящего исследования – разработка методики по определению оптимальной концентрации наноструктурированных порошков в защитном газе при сварке плавящимся электродом в среде аргона. В экспериментальных исследованиях для подтверждения расчетов использовали нанопорошок молибдена, введение которого в сварочную ванну осуществляли через специальное устройство. Наплавку образцов проводили на экспериментальной установке, в состав которой входили сварочная головка ГСП-2, укомплектованная разработанным устройством, источник питания ВС-300Б. Для наплавки образцов из стали 12Х18Н10Т применяли сварочную проволоку 12Х18Н9Т диам. 1,2 мм. Для обеспечения качественного сварного соединения при сварке размеры дендритов должны стремиться к минимуму. Стабильный процесс сварки обуславливается переходом капель электродного металла с торца сварочной проволоки в сварочную ванну, следовательно, объем капли электродного металла также должен стремиться к минимуму. До начала оптимизации концентрации наноструктурированных порошков в защитном газе было установлено влияние параметров режима сварки плавящимся электродом в среде аргона на микроструктуру наплавленного металла. Результаты исследований показали, что минимальный размер зерен наблюдается при силе тока 240 – 260 А и напряжении дуги 28 – 30 В. При этих режимах были проведены исследования по выбору оптимальной концентрации наноструктурированных порошков в защитном газе. Установлено, что оптимальная концентрация наноструктурированных порошков-модификаторов в защитном газе составляет 20 мг/м сварного шва. Установлено, что применение разной концентрации наноструктурированных порошков в защитном газе позволяет получать различную микроструктуру наплавленного металла. Наиболее слаборазветвленные дендриты и равновесная структура по размеру дендритов достигается при концентрации нано- структурированного порошка в защитном газе 20 мг/м сварного шва. При добавлении наноструктурированных порошков-модификаторов в жидкую сварочную ванну происходит увеличение механических свойств сварных соединений по сравнению с процессом сварки без добавления напорошков-модификаторов при +20 °С на 7,5 %, при +500 °С на 6,5 %.</p><p> </p></abstract><trans-abstract xml:lang="en"><p>The paper presents the theoretical and experimental studies to determine the optimal concentration of nanostructured powders in the shielding gas. The objective of this study is the development of a defi nition technique for optimal concentration of nanostructured powders in the shielding gas during welding by consumable electrode in the argon medium. Molybdenum nanopowder (NP Mo) was used to confi rm the calculations used in the experimental studies. The injection of the powder into the weld bath was carried out through the special device. The surfacing of samples was carried out in a pilot plant, which consisted of a welding head GSP-2 with the developed device, the power supply had rated current of 300 A. For surfacing of steel samples (austenitic steel with chemical composition: C – 0.12 %, Cr – 18 %, Ni – 10 %, Ti – 1 %) the welding wire with diameter of 1.2 mm was used (chemical composition: C – 0.12 %, Cr – 18 %, Ni – 9 %, Ti – 1 %,). To ensure the quality of the welded joint during welding, the dimension parameters of dendrites should tend to a minimum. A stable welding process is caused by the transition of electrode metal droplets from the end of the welding wire into the weld bath. Therefore, the volume of the electrode metal droplet should also tend to a minimum. Before the start of the optimization of nanostructured powders concentration in the shielding gas, the eff ect of welding mode parameters by consumable electrode in the argon medium on the microstructure of the weld metal was established. The results of the investigations have shown that the minimum grain size is observed at a current strength of 240 – 260 A and arc voltage of 28 – 30 V. In these modes, the studies were conducted to select the optimum concentration of nanostructured powders in the shielding gas. It was found that the optimum concentration of nanostructured powders-modifi ers in the shielding gas is 20 mg/m of the welded joint. It was established that the use of diff erent concentrations of nanostructured powders in the shielding gas makes it possible to obtain a diff erent microstructure of the weld metal. The most lightly branched dendrites and the equilibrium structure according to the dendrites size are achieved at a concentration of nanostructured powder in the shielding gas of 20 mg/m of the weld. When adding nanostructured powders-modifi ers to a liquid weld bath, the mechanical properties of the welded joints increase as compared to the welding process, without the addition of a powder-modifi er at +20 °C by 7.5 %, at +500 °C by 6.5 %.</p><p> </p></trans-abstract><kwd-group xml:lang="ru"><kwd>наноструктурированные порошки</kwd><kwd>оптимальная концентрация</kwd><kwd>защитный газ</kwd><kwd>многофакторное планирование</kwd><kwd>кристаллизация</kwd><kwd>сварочная ванна</kwd></kwd-group><kwd-group xml:lang="en"><kwd>nanostructured powders</kwd><kwd>optimal concentration</kwd><kwd>shielding gas</kwd><kwd>multifactorial planning</kwd><kwd>crystallization</kwd><kwd>weld bath</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">Kivinema E.I., Olson D.L., Maltock D.K Particulate-reinforced metal matrix composite as a weld deposit // Welding J. 1995. No. 3. 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