PRODUCTION OF HIGH STRENGTH AL-LI SERIES ALLOY CASTING

摘要

PURPOSE: To provide the method for producing a high strength Al-Li series alloy casting having high specific strength and high specific, elasticity. ;CONSTITUTION: This allay contains, by weight, 0.5 to 3.5% Li and 0.5 to 6.0% Cu and furthermore contains at least one kind of element selected from a group constituted of 0.05 to 1% Mg, 0.05 to 0.3% Zr, 0.05 to 1.5% Zn, 0.05 to 0.3% Cr, 0.05 to 1.5% Mn, 0.05 to 0.3% V and 0.005 to 0.1% Ti, and the balance Al with inevitable impurities. Then, Tl phases (Al₂CuLi) are precipitated in this alloy. Moreover, this allay may be incorporated with 0.05 to 0.3% In. The casting of the Al-Li series alloy having the same compsn. is subjected to homogenizing treatment at 540 to 570°C, is thereafter subjected to solution hardening at 540 to 570°C and is subsequently tempered at 110 to 250°C to precipitate the Tl phases (Al₂CuLi) therein.;COPYRIGHT: (C)1994,JPO&Japio