Obtaining High-Quality Cast Billets from Cu—Mg Alloys

摘要

The technology of obtaining cast billets of the Cu—Mg (0.1—1.0%) alloys, in which continuous smelting and continuous horizontal casting are implemented in one smelting—casting aggregate, is developed. In this case, the refinement and homogenizing processing of the melt is performed continuously during the entire time of smelting and casting. Technical solutions accepted for this purpose make it possible to overcome the difficulties in providing the precision magnesium content, eliminate its strong liquation in the melt, neutralize the high surface activity of magnesium and its liability to oxidation, stabilize the recovery of magnesium from the foundry alloy and minimize the contamination of the melt by its oxidation products, attain deep removal of gases and nonmetallic inclusions from the melt, homogenize the melt in regards to the chemical composition, and acquire high-quality cast billets.