AL-CU-MG HIGH TENSILE ALUMINUM ALLOY FOR CASTING AND ITS PRODUCTION

摘要

PURPOSE:To produce an Al alloy for casting having excellent fatigue strength and heat resistance, by melting and producing an Al-Cu-Mg alloy added with a small quantity of V and W, then casting, and subjecting said alloy to a solution treatment, quenching, tempering and artifical aging treatment at adequate temps. CONSTITUTION:The Al-Cu-Mg alloy added with, by weight, 0.10-0.30% V and 0.05-0.35% W is melted and produced, and is cast, preferably in a vacuum atm. Said alloy is then subjected to the solution treatment at about 520 deg.C. The alloy is quenched in hot water upon ending of the solution treatment and is tempered at about 160 deg.C to subject to the artifical aging treatment. The antifatigue characteristic, castability and heat resistance are thereby improved and the Al-Cu-Mg high tensile Al alloy for casting comparable to a forged article is obtd.