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Влияние изотермической обработки на механические и трибологические свойства сплава Zn – 40 % Al – 2 % Cu – 2 % Si

Темел Савашкан, Алы Паша Хекымоглу, Зекы Азаклы

Аннотация


Исследовано влияние изотермической выдержки при температурах 100 – 250 °C в течение 8 ч на структуру, механические и трибологические свойства сплава Zn – 40 % Al – 2 % Cu – 2 % Si, полученного методом литья в кокиль. Изотермическая обработка устраняет дендритную ликвацию, формируя крупнозернистую полиэдрическую структуру, содержащую a-твердый раствор с мелкими включениями кремния и фазы, содержащей большое количество кремния. Повышение температуры изотермической выдержки приводит к снижению твердости и прочности и повышению пластичности, а также увеличению коэффициента трения и величины износа сплава при снижении средней шероховатости поверхности.

Ключевые слова


сплавы цинка; изотермическая обработка; микроструктура; механические свойства; износ

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Литература


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DOI: https://doi.org/10.30906/mitom.2023.4.67-74

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