HIGH-MODULUS, HIGH-MECHANICAL STRENGTH AL-BASED ALLOY AND PRODUCTION PROCESS

摘要

SHORT ALLOYS BASED Al HIGH MODULE STRENGTH AND HIGH AND METHOD FOR OBTAINING The invention relates to alloys of Al of the series 7000 with a high modulus (E? 74 GPa), high mechanical resistance (R 0.2? 530 MPa in the longitudinal direction), good toughness (KIC, longitudinal direction 20 And good resistance to corrosion (tension 0250 MPa in the short transverse direction, life 30 days - ASTM G 38-73). The alloy according to the invention has the following composition by weight: 5.5 to 8.45% 2r 2 to 3.5% Mg 0.5 to 2.5% Cu up to 0.5% Fe up to 0.5% If other elements? And 0.05% each to 0.15% in total with 0.1? Zr? 0.5% 0.3? Cr? 0.6% 0.3? Mn? 1.1% It is preferably prepared by the following process: a) forming by spray deposition a solid body having the claimed composition above, b) converting the body into a product opens, between 300 and 450 ° C and then possibly cold c) is thermally treated product crafted a solution annealing, quenching and tempering in a T6 or T7. FIG.1