Достижение высокой пластичности переработанного Al – Si-сплава путем предварительной деформации и обработки редкоземельным элементом Y
Аннотация
Исследовано влияние предварительной деформации на микроструктуру и механические свойства термически обработанного регенерированного алюминиевого сплава ADC12 (АК12М2), метаморфизованного редкоземельным элементом Y. Определен наиболее эффективный режим предварительной деформации после термической обработки Т6 сплава. Изучено изменение микроструктуры и фазового состава сплава в трехмерном измерении. Установлено, что с увеличением степени предварительной деформации размер частиц Si значительно уменьшается, а эффект сфероидизации усиливается. Фаза a-Fe начинает растрескиваться при деформации со степенью 7,5 %, а рекристаллизация происходит при предварительной деформации со степенью 10 %. Экспериментально показано, что термическая обработка регенерированного алюминиевого сплава ADC12 с редкоземельным Y-метаморфным металлом после предварительной деформации со степенью 5 % обеспечивает достижение высокого комплекса механических свойств: предел прочности на разрыв 325 МПа, относительное удлинение 15 %, произведение sв × d ~ 5 ГПа × %, твердость 43 HRA, коэффициент трения 0,371 и истираемость 1,6 мг.
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Литература
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DOI: https://doi.org/10.30906/mitom.2026.3.43-43
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