Grain refinement and improved treatment for aluminum master alloy containing strontium and boron

摘要

Improved aluminum master alloys containing strontium and boron are provided for simultaneously modifying and grain refining Al alloys, and in particular, hypoeutectic Al-Si alloys. The improved master alloy contains, by weight percent, about 0.20-20 % Sr, 0.10-10 % B, and the balance Al with impurities. The master alloy may also contain about 0.20 to about 20 % Si by weight percent. The master alloys have a high degree of ductility for purposes of forming continuously rolled master alloy rod stock.