Removing impurity alloying components from an aluminum cast alloy comprises completely melting the cast alloy, mixing with boron, casting the melt, and removing or retaining solids produced from the melt before or during casting

摘要

Removing impurity alloying components from an aluminum cast alloy comprises completely melting the cast alloy; mixing with 0.005 weight % boron for the purpose of cleaning; casting the melt for a time sufficient for the boron to react with the impurity alloying components; and removing or retaining solids produced from the melt before or during casting. Preferred Features: Boron is added in the form of an aluminum-boron pre-alloy. Reaction time is at least one hour. The aluminum cast alloy is further treated for the purpose of grain refinement.