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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">10.17073/0021-3438-2016-5-42-51</article-id><article-id custom-type="elpub" pub-id-type="custom">cvmet-376</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>ОПРЕДЕЛЕНИЕ ВЕЛИЧИНЫ КОЭФФИЦИЕНТА ТЕПЛОПЕРЕДАЧИ МЕЖДУ ОТЛИВКОЙ ИЗ СПЛАВА АК7ч (A356) И ФОРМОЙ ИЗ ХОЛОДНОТВЕРДЕЮЩЕЙ СМЕСИ</article-title><trans-title-group xml:lang="en"><trans-title>Determination of heat transfer coefficient between AK7ch (A356) aluminum alloy casting and no-bake mold</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>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, ст. препод. кафедры технологии литейных процессов НИТУ «МИСиС»</p></bio><bio xml:lang="en"><p>Cand. Sci. (Eng.), senior lecturer, Foundry Department, NUST «MISIS»</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 кафедры технологии литейных процессов НИТУ «МИСиС»</p></bio><bio xml:lang="en"><p>Cand. Sci. (Eng.), assistant prof., Foundry Department, NUST «MISIS»</p></bio><email xlink:type="simple">misistlp@mail.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>Целовальник</surname><given-names>Ю. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Tselovalnik</surname><given-names>Yu. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>студент кафедры технологии литейных процессов НИТУ «МИСиС»</p></bio><bio xml:lang="en"><p>student, Foundry Department, NUST «MISIS».</p></bio><email xlink:type="simple">TselovalnikYuri@gmail.com</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 «МИСиС», (119049, г. Москва, Ленинский пр-т, 4).</institution><country>Россия</country></aff><aff xml:lang="en"><institution>National University of Science and Technology (NUST) «MISIS» (119049, Russia, Moscow, Leninskii pr., 4).</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2016</year></pub-date><pub-date pub-type="epub"><day>02</day><month>11</month><year>2016</year></pub-date><volume>0</volume><issue>5</issue><fpage>42</fpage><lpage>51</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Баженов В.Е., Колтыгин А.В., Целовальник Ю.В., 2016</copyright-statement><copyright-year>2016</copyright-year><copyright-holder xml:lang="ru">Баженов В.Е., Колтыгин А.В., Целовальник Ю.В.</copyright-holder><copyright-holder xml:lang="en">Bazhenov V.E., Koltygin A.V., Tselovalnik Y.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/376">https://cvmet.misis.ru/jour/article/view/376</self-uri><abstract><p>Коэффициент теплопередачи h определяли между цилиндрической отливкой из алюминиевого сплава АК7ч (А356) и формой из холоднотвердеющей смеси на фурановом связующем путем минимизации значения функции ошибок, отражающей разницу между экспериментальными и расчетными значениями температур в форме при заливке, затвердевании и охлаждении. Выше температуры ликвидуса сплава (617 °С) найденное значение коэффициента теплопередачи равно hL = 900 Вт/(м2·К). Ниже температуры солидуса сплава (556 °С) коэффициент hS = 600 Вт/(м2·К). Изменение величины коэффициента теплопередачи в интервалах hL = 900÷1200 Вт/(м2·К) (выше температуры ликвидуса сплава) и hS = 500÷900 Вт/(м2·К) (ниже температуры солидуса) практически не влияет на величину функции ошибок, которая остается в пределах ~22 °С. Показано, что допустимо использование упрощенного подхода, когда задается постоянная величина h = 500 Вт/(м2·К), что приводит к ошибке 23,8 °С. Экспериментально, на примере цилиндрической отливки, подтверждено изменение коэффициента теплопередачи по высоте отливки, связанное с различной величиной металлостатического давления, действующего на возникающую твердую корку отливки во время ее затвердевания, что обусловливает более плотный контакт металла и формы в нижней части отливки.</p></abstract><trans-abstract xml:lang="en"><p>Determined the iHTC (interface Heat Transfer Coefficient) between AK7ch (A356) aluminum alloy casting and no-bake mold. The heat transfer coefficient is determined by minimizing the error function values, representing the difference between the experimental and calculated temperature in the mold values during pouring, solidification and cooling. Determined the values of the heat transfer coefficient above the liquidus temperature of the alloy hL = 900 W/(m2·K) and below the solidus temperature hS = 600 W/(m2·K).Changing of the heat transfer coefficient within hL = 900÷1200 W/(m2·K) and hS = 500÷900 W/(m2·K) has no sufficient effect on the error value, and it remains within ~22 °C. It was shown the usability of the simplified approach using constant heat transfer coefficient h = 500 W/(m2·K), whereas error value is 23,8 °C. Changing of iHTC as function of height of the cylindrical ingot was experimentally confirmed. This owes to the different values of metallostatic pressure applied to the solid skin of the solidifying casting, leads to closer contact of the metal and mold in the bottom of the casting.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>компьютерное моделирование литейных процессов</kwd><kwd>ProCast</kwd><kwd>коэффициент теплопередачи</kwd><kwd>холоднотвердеющая смесь (ХТС)</kwd><kwd>песчаная форма</kwd><kwd>теплофизические свойства</kwd></kwd-group><kwd-group xml:lang="en"><kwd>computer simulation of casting processes</kwd><kwd>ProCast</kwd><kwd>heat transfer coefficient</kwd><kwd>iHTC</kwd><kwd>no-bake</kwd><kwd>sand casting</kwd><kwd>thermal properties</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">Тихомиров М.Д. Сравнение тепловых задач в системах моделирования литейных процессов «Полигон» и ProCast // Компьютерное моделирование литейных процессов: Сб. тр. 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