Aluminium alloys are crucial in the aerospace and automotive industries due to their low specific density. High hardness is important for these products, which can be improved by percipitation hardening. Percipitation hardening consists of three phases, solution treatment, quenching and artificial or natural aging. In our diploma work, the aluminium alloy 7075 was considered, whose main alloying element is zinc (5.6-6.1%). The chemical composition includes magnesium (2.1-2.5%), copper (1.2-1.6%) and a total of less than 0.5% of silicon, iron, manganese, titanium, chromium and other metals. The influence of different quenching media (water and oil), different temperatures of artificial aging (160, 140 and 120 °C) and different times of artificial aging on hardness, electrical conductivity, microstructure and corrosion resistance of samples were studied.
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