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Влияние старения на структуру и свойства непрерывно-литого листового проката из алюминиевого сплава 6061

Чэнь Синюй, Чзан Синьюй, Чзан Вэй, Сюй Чжэнь, Ван Хунбиньн, Сун Хуа, Сюэ Тун

Аннотация


Исследовано влияние старения на структуру и механические свойства непрерывно-литого листового проката из алюминиевого сплава 6061. Предложен режим обработки, состоящий из закалки от 550 °C, 2 ч в воде и искусственного старения при 200 °C, 6 ч, после которого значения σв, δ и HV сплава составляют 318 МПа, 14 % и 127 HV0,1 соответственно. Разрушение закаленного сплава имеет вязкий характер, после старения смешанный. Средний размер зерна после старения составляет 0,09 мм, по границам зерен расположено большое количество наноразмерных включений фаз Mg2Si и теплостойкой α-Fe, что способствует повышению механических свойств листа.

Ключевые слова


aluminum alloy 6061; aging; mechanical properties; microstructure; fracture morphology

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Литература


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