AL-LI ALLOY EXTRUDED MATERIAL EXCELLENT IN HARDENABILITY AND HAVING HIGH SPECIFIC STRENGTH

摘要

PURPOSE: To produce an Al-Li alloy extruded material combining superior hardenability with high specific strength by incorporating specific percentages of Li, Mg, Cu, Zr, Cr, Mn, V, and Ti into Al. ;CONSTITUTION: An Al-Li extruded material having a composition consisting of, by weight, 1.5-3.5% Li, 1.0-3.5% Mg, 0.05-1.5% Cu, one or ≥2 elements selected from the group consisting of 0.05-0.3% Zr, 0.05-0.3% Cr, 0.05-1.5% Mn, 0.05-0.3% V, and 0.005-0.1% Ti, and the balance Al with inevitable impurities is prepared. Further, the contents of Fe and Si are controlled to ≤ about 0.25%, respectively, and crystalline grain size is regulated to ≤ about 3mm. By this method, the Al-Li alloy extruded material excellent in hardenability and having high specific strength can be obtained.;COPYRIGHT: (C)1993,JPO&Japio