Дослідження Структури Та Властивостей Алюмінієвих Сплавів, Модифікованих Дисперсними Композиціями

Abstract

The effect of modifying dispersed compositions on the grain structure and mechanical properties of industrial aluminum alloys is studied. Aluminum alloys of the Al-Mg, Al-Mg-Sc systems were modified with dispersed SiC powder with a particle size of up to 200 nm. Calculated the amount of modifier to enter into the melt. The physicochemical properties of dispersed SiC were studied. The melting of alloys AL4S, 1570, 2219, AK9ch in the initial state and with the processing of SiC melts was carried out. The dependences of the particle size and amount of the modifier on the mechanical properties of the alloys are established. The mechanism of interaction of the modifier with the aluminum melt during crystallization is established. In industrial experiments, the most effective particle size of SiC was found to increase the σт of the AK9ch alloy from 115 to 260 MPa in the cast state. The optimal SiC content (0,10%) was determined to increase the σt of aluminum alloys.