Abstract
The paper presents studies the influence of a pilot-industrial sample of an electromagnetic modifier on the structure of an aluminum ingot. The researches were carried out on a rotary casting machine, a casting and rolling unit designed for the manufacture of aluminum wire rod. As part of the R&D, tests were carried out on the experimental installation of an electromagnetic modifier at LA No. 3 of LO No. 1 of the RUSAL Bratsk branch in Shelekhov. There were selected 6 samples of cast billet and 6 samples of wire rod during the operation of the unit at the nominal casting speed, obtained under various operating modes of the pilot plant. During the metallographic studies of the samples, the influence of electromagnetic influence on the modification of continuously cast blanks made of aluminum alloy A5E was established. The most degree of modification was observed at I=42A, f=40 Hz. The results of R&D confirmed the possibility of grinding the crystalline structure of a continuously cast billet cast in a rotary machine by exposure to an electromagnetic field. This significantly improves the quality of the aluminum wire rod and leads to a significant reduction in the scrap of wires made from wire rod.
Keywords:
aluminum wire rod, modification, electromagnetic effect, magnetic hydrodynamics, crystallization.