Methods of reducing old oxides in aluminum castings

摘要

A method of reducing entrained aluminum oxides in aluminum castings. The method comprises preheating a furnace charge to remove moisture and contaminants. The furnace charge is then coated on all free surfaces with a layer of flux. Subsequently the furnace charge is melted in a furnace to form a melt bath of liquid aluminum suitable for casting. The flux layer removes the naturally occurring oxide film from the furnace charge surface as well as provides a cover flux to protect the melt bath from oxidation.

主权项

1. A method of reducing entrained aluminum oxides in aluminum castings; the method comprising:
preheating a furnace charge of an aluminum alloy; coating the furnace charge free surfaces with a layer of flux having approximately 30.8% by weight NaCl by dipping the furnace charge into a molten flux bath; and melting the furnace charge in a furnace to form a melt bath with a melt surface.