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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">10.17073/0368-0797-2022-2-113-119</article-id><article-id custom-type="elpub" pub-id-type="custom">blackmet-2258</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>Исследование структуры и механических свойств сварных соединений высокопрочной низколегированной стали арктического назначения</article-title><trans-title-group xml:lang="en"><trans-title>Structure and mechanical properties of welded joints of high-strength low-alloy steel for arctic purposes</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4790-2821</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Шекшеев</surname><given-names>М. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Sheksheev</surname><given-names>M. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Максим Александрович Шекшеев, к.т.н., доцент кафедры «Машины и технологии обработки давлением и машиностроение»</p><p>455000, Челябинская обл., Магнитогорск, пр. Ленина, 38</p></bio><bio xml:lang="en"><p>Maksim A. Sheksheev, Cand. Sci. (Eng), Assist. Prof. of the Chair “Machinery and Metal Forming Technology and Mechanical Engineering” </p><p>38 Lenina Ave., Magnitogorsk, Chelyabinsk Region 455000</p></bio><email xlink:type="simple">shecsheev@yandex.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>Ширяева</surname><given-names>Е. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Shiryaeva</surname><given-names>E. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Елена Николаевна Ширяева, аспирант кафедры «Технологии обработки материалов»</p><p>455000, Челябинская обл., Магнитогорск, пр. Ленина, 38</p></bio><bio xml:lang="en"><p>Elena N. Shiryaeva, Postgraduate of the Chair “Materials Processing Technologies” </p><p>38 Lenina Ave., Magnitogorsk, Chelyabinsk Region 455000</p></bio><email xlink:type="simple">e.shyraeva@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>Михайлицын</surname><given-names>С. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Mikhailitsyn</surname><given-names>S. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Сергей Васильевич Михайлицын, к.т.н., доцент кафедры «Машины и технологии обработки давлением и машиностроение»</p><p>455000, Челябинская обл., Магнитогорск, пр. Ленина, 38</p></bio><bio xml:lang="en"><p>Sergei V. Mikhailitsyn, Cand. Sci. (Eng), Assist. Prof. of the the Chair “Machinery and Metal Forming Technology and Mechanical Engineering” </p><p>38 Lenina Ave., Magnitogorsk, Chelyabinsk Region 455000</p></bio><email xlink:type="simple">svmikhaylitsyn@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0886-1601</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Сычков</surname><given-names>А. Б.</given-names></name><name name-style="western" xml:lang="en"><surname>Sychkov</surname><given-names>A. B.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Александр Борисович Сычков, д.т.н., профессор кафедры литейного производства и материаловедения</p><p>455000, Челябинская обл., Магнитогорск, пр. Ленина, 38</p></bio><bio xml:lang="en"><p>Aleksandr B. Sychkov, Dr. Sci. (Eng.), Prof. of the Chair of Foundry and Material Science </p><p>38 Lenina Ave., Magnitogorsk, Chelyabinsk Region 455000</p></bio><email xlink:type="simple">absychkov@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>Емелюшин</surname><given-names>А. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Emelyushin</surname><given-names>A. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Алексей Николаевич Емелюшин, д.т.н., профессор кафедры литейного производства и материаловедения</p><p>455000, Челябинская обл., Магнитогорск, пр. Ленина, 38</p></bio><bio xml:lang="en"><p>Aleksei N. Emelyushin, Prof. of the Chair of Foundry and Material Science </p><p>38 Lenina Ave., Magnitogorsk, Chelyabinsk Region 455000</p></bio><email xlink:type="simple">emelushin@magtu.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Магнитогорский государственный технический университет им. Г.И. Носова</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Nosov Magnitogorsk State Technical University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>17</day><month>03</month><year>2022</year></pub-date><volume>65</volume><issue>2</issue><fpage>113</fpage><lpage>119</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Шекшеев М.А., Ширяева Е.Н., Михайлицын С.В., Сычков А.Б., Емелюшин А.Н., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Шекшеев М.А., Ширяева Е.Н., Михайлицын С.В., Сычков А.Б., Емелюшин А.Н.</copyright-holder><copyright-holder xml:lang="en">Sheksheev M.A., Shiryaeva E.N., Mikhailitsyn S.V., Sychkov A.B., Emelyushin A.N.</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/2258">https://fermet.misis.ru/jour/article/view/2258</self-uri><abstract><p>Работа посвящена исследованиям по установлению причин образования трещин в сварных соединениях высокопрочной стали арктического назначения на основе изучения структуры и механических свойств металла шва и зоны термического влияния. Потребителями машиностроительной продукции предъявляются все более высокие требования к сварным соединениям металлоконструкций. Это обусловливает необходимость применения для их производства проката из сталей, которые обладают повышенными механическими и специальными свойствами. В работе показано, что при сварке сталей типа MAGSTRONG W700 в локальных участках сварных соединений наблюдается образование трещин. Установлено, что структура металла шва сварных соединений стали MAGSTRONG W700 характеризуется наличием столбчатых кристаллов с твердостью 312 – 323 HV. Структура металла на участке перегрева зоны термического влияния характеризуется наличием укрупненного первичного зерна, а также пакетными образованиями бейнита и бейнито-мартенсита с твердостью 338 – 352 HV. Уровень временного сопротивления разрыву металла зоны термического влияния составляет 618 – 627 МПа. В зависимости от температуры испытания, значения ударной вязкости металла зоны термического влияния изменяются от 62 до 86 Дж/см2. Сталь MAGSTRONG W700 обладает хорошей сопротивляемостью к образованию горячих трещин при сварке (UCS = 20,3), однако имеет повышенную склонность к образованию холодных трещин (Сэкв ≥ 0,48). Анализ полученных данных показал, что разрушение сварных соединений исследуемой стали происходит по причине ее неудовлетворительной свариваемости. Такая свариваемость обусловлена сложной химической композицией, а также целой совокупностью факторов (таких как формирование неблагоприятных структур в металле сварных соединений при воздействии термических циклов сварки, сложная картина сварочных напряжений, уровень которых превышает временное сопротивление разрыву металла). Структура металла шва имеет крупнокристаллическое строение, что значительно ослабляет соединение.</p></abstract><trans-abstract xml:lang="en"><p>The work is devoted to the research of cracks causes in welded joints of high­strength steel for arctic purposes based on the study of the structure and mechanical properties of the weld metal and the zone of thermal influence. Consumers of machine­building products make increasingly high demands on welded joints of metal structures. This necessitates the use of rolled steels for their production, which have increased mechanical and special properties. When welding MAGSTRONG W700 type steels, cracks are observed in local sections of welded joints. It was established that the structure of the weld metal of welded joints of MAGSTRONG W700 steel is characterized by the presence of columnar crystals with a hardness of 312 – 323 HV. The metal structure in the overheating area of thermal influence zone is characterized by the presence of enlarged primary grain, as well as batch formations of bainite and bainite-martensite with hardness of 338 – 352 HV. The level of temporary resistance to rupture of the metal in thermal influence zone is 618 – 627 MPa. Depending on the test temperature, values of the impact strength of the metal in thermal influence zone vary from 62 to 86 J/cm2. MAGSTRONG W700 steel has good resistance to the formation of hot cracks during welding (UCS = 20,3), however, it has an increased tendency to form cold cracks (CE = 0,48). Analysis of the data obtained showed that destruction of welded joints of the studied steel occurs due to its unsatisfactory weldability. Such weldability is due to a complex chemical composition, as well as a whole set of factors (such as the formation of unfavorable structures in the metal of welded joints under the influence of thermal welding cycles, a complex picture of welding stresses, the level of which exceeds the temporary resistance to metal rupture). Also, the structure of the weld metal has a large­crystalline structure, which significantly weakens the connection.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>высокопрочная сталь</kwd><kwd>сварной шов</kwd><kwd>зона термического влияния</kwd><kwd>свариваемость</kwd><kwd>холодные трещины</kwd><kwd>горячие трещины</kwd><kwd>структура металла</kwd><kwd>механические свойства</kwd></kwd-group><kwd-group xml:lang="en"><kwd>high­strength steel</kwd><kwd>welded joint</kwd><kwd>thermal influence zone</kwd><kwd>weldability</kwd><kwd>cold cracks</kwd><kwd>hot cracks</kwd><kwd>metal structure</kwd><kwd>mechanical properties</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена в рамках государственной поддержки молодых российских ученых – гранта Президента РФ (№ МК­ 3849.2021.4).</funding-statement><funding-statement xml:lang="en">The work was supported by a grant of the President of the Russian Federation (No. MK­3849.2021.4).</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">Якушин Б.Ф., Килев В.С., Тихонов В.П., Потапов С.В. 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