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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">cvmet</journal-id><journal-title-group><journal-title xml:lang="ru">Известия вузов. Цветная металлургия</journal-title><trans-title-group xml:lang="en"><trans-title>Izvestiya. Non-Ferrous Metallurgy</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0021-3438</issn><issn pub-type="epub">2412-8783</issn><publisher><publisher-name>НИТУ МИСИС</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.17073/0021-3438-2018-5-31-38</article-id><article-id custom-type="elpub" pub-id-type="custom">cvmet-800</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>Литейное производство</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Foundry</subject></subj-group></article-categories><title-group><article-title>ПРОГНОЗИРОВАНИЕ НЕДОЛИВОВ В ОТЛИВКЕ ИЗ СПЛАВА МЛ5 И ЖИДКОТЕКУЧЕСТИ СПЛАВА С ИСПОЛЬЗОВАНИЕМ КОМПЬЮТЕРНОГО МОДЕЛИРОВАНИЯ</article-title><trans-title-group xml:lang="en"><trans-title>PREDICTION OF AZ91 CASTING MISRUNS AND ALLOY FLUIDITY USING NUMERICAL SIMULATION</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>Петрова</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Petrova</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>аспирант кафедры литейных технологий и художественной обработки материалов,</p><p>119049, г. Москва, Ленинский пр-т, 4</p></bio><bio xml:lang="en"><p>postgraduate student, Department of foundry technologies and material art working (FT&amp;MAW), </p><p>119049, Moscow, Leninskii pr., 4</p></bio><email xlink:type="simple">petrova_an_v@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>Баженов</surname><given-names>В. Е.</given-names></name><name name-style="western" xml:lang="en"><surname>Bazhenov</surname><given-names>V. E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>канд. техн. наук, доцент той же кафедры,</p><p>119049, г. Москва, Ленинский пр-т, 4</p></bio><bio xml:lang="en"><p>Cand. Sci. (Tech.), assistant prof., Department of FT&amp;MAW,</p><p>119049, Moscow, Leninskii pr., 4</p></bio><email xlink:type="simple">V.E.Bagenov@gmail.com</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>Колтыгин</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Koltygin</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>канд. техн. наук, доцент той же кафедры,</p><p>119049, г. Москва, Ленинский пр-т, 4</p></bio><bio xml:lang="en"><p>Cand. Sci. (Tech.), assistant prof., Department of FT&amp;MAW,</p><p>119049, Moscow, Leninskii pr., 4</p></bio><email xlink:type="simple">misistlp@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Национальный исследовательский технологический университет (НИТУ) «МИСиС»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>National University of Science and Technology (NUST) «MISIS»</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2018</year></pub-date><pub-date pub-type="epub"><day>12</day><month>10</month><year>2018</year></pub-date><volume>0</volume><issue>5</issue><fpage>31</fpage><lpage>38</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Петрова А.В., Баженов В.Е., Колтыгин А.В., 2018</copyright-statement><copyright-year>2018</copyright-year><copyright-holder xml:lang="ru">Петрова А.В., Баженов В.Е., Колтыгин А.В.</copyright-holder><copyright-holder xml:lang="en">Petrova A.V., Bazhenov V.E., Koltygin A.V.</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://cvmet.misis.ru/jour/article/view/800">https://cvmet.misis.ru/jour/article/view/800</self-uri><abstract><p>Прогнозирование образования недоливов в тонкостенных отливках из магниевых сплавов является важной задачей для литейного производства. Для ее решения может быть использовано компьютерное моделирование литейных процессов. Адекватных результатов моделирования можно добиться при наличии правильных теплофизических свойств сплава и формы в широком интервале температур, значения коэффициента теплопередачи между отливкой и формой, а также критической доли твердой фазы, при которой происходит остановка течения расплава в форме. В настоящей работе путем сопоставления длин спиральных проб, полученных с помощью моделирования заполнения, и экспериментальных длин при тех же условиях заливки определен коэффициент теплопередачи между магниевым сплавом МЛ5 (AZ91) и формой из холоднотвердеющей смеси (ХТС). Выше температуры ликвидуса его значения равны hL = 1500 Вт/(м2 ·К) для температур заливки 670 и 740 °С и hL = 1800 Вт/(м2 ·К) для 810 °С. Ниже температуры солидуса hS = 600 Вт/(м2 ·К). Также была установлена критическая доля твердой фазы для магниевого сплава МЛ5 (AZ91) при заливке в форму из ХТС (при скорости охлаждения ~2 К/с) – ее значение составило 0,1–0,15. Путем сопоставления положения недоливов по результатам моделирования и в реальной отливке «Колпак», залитой из сплава МЛ5 (AZ91) в форму из ХТС, было уточнено значение критической доли твердой фазы. Заливку отливок производили при температурах заливки 630 и 670 °С, и в обоих случаях значение критической доли твердой фазы составило 0,1.</p></abstract><trans-abstract xml:lang="en"><p>Prediction of the misrun formation in thin-walled castings of magnesium alloys is a crucial task for foundry. The computer simulation of the casting processes can be used to solve this problem. A reasonable simulation results requires the correct thermal properties of the alloy and the mold over a wide range of temperatures and the value of interfacial heat transfer coefficient between the casting and the mold, and the critical solid fraction at which the alloy flow in the mold is choked off. In this paper we determine the interfacial heat transfer coefficient between the magnesium alloy ML5 (AZ91) and the sand mold with a furan binder. It was done by the comparing the simulated spiral test lengths with the experimental spiral test lengths obtained under the same conditions. Above the liquidus temperature the interfacial heat transfer coefficient IHTCL = 1500 W/(m2 ·K) at pouring temperatures 670 and 740 °С and IHTCL = 1800 W/(m2 ·K) at pouring temperature 810 °С. Below the solidus temperature the interfacial heat transfer coefficient IHTCS = 600 W/(m2 ·K). We also determined the critical solid fraction of ML5 (AZ91) magnesium alloy for the casting made in the furan bonded sand mold (at a cooling rate ~2 K/s) and it was 0.1–0.15. We compared the simulated misruns position and the experimental misrun position in the «Protective cup» casting produced from the ML5 (AZ91) alloy into the sand mold with furan binder. The value of the critical solid fraction was clarified. The castings were made at pouring temperatures 630 and 670 °C, and the critical solid fraction was 0.1 in both cases.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>моделирование жидкотекучести</kwd><kwd>магниевый сплав</kwd><kwd>точка когерентности</kwd><kwd>проба на жидкотекучесть</kwd><kwd>ProCast</kwd><kwd>недоливы</kwd></kwd-group><kwd-group xml:lang="en"><kwd>fluidity simulation</kwd><kwd>magnesium alloy</kwd><kwd>coherency point</kwd><kwd>spiral fluidity test</kwd><kwd>ProCast</kwd><kwd>misrun</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Министерство образования и науки РФ, стипендия Президента РФ молодым ученым и аспирантам, осуществляющим перспективные научные исследования и разработки по приоритетным направлениям модернизации российской экономики (конкурс 2016—2018 гг.)</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">Jakumeit J., Subasic E., Bünck M. 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