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Микроструктура и механические свойства сварных соединений стали Hardox 400 (сталь 18ХГТ), полученных методом MAG
Аннотация
Исследованы микроструктура и механические свойства сварных соединений из стали Hardox 400 (российский аналог — сталь 18ХГТ), полученных полуавтоматической дуговой сваркой плавящимся электродом в среде защитного газа. Для сварки использована сварочная проволока ER 120 SG (Mn3Ni2CrMo) диаметром 1,2 мм. Проведены испытания сварного соединения на статическое растяжение. Показано, что трещины возникают за пределами зоны металла шва, а предел прочности при растяжении и энергия удара у сварного соединения выше, чем у основного металла. Наибольшая твердость (407 HV) наблюдается в области металла шва в основном из-за наличия мартенситной структуры. Затем твердость последовательно уменьшается в направлении зоны термического влияния и основного металла.
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Литература
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DOI: https://doi.org/10.30906/mitom.2025.4.57-61
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