AL-LI-CU-MG ALLOY WITH GOOD COLD DEFORMABILITY AND GOOD SHOCK RESISTANCE

摘要

the invention relates to a base alloy containing mainly of al li cu mg zr, and as the main alloying elements and has good suitability for cold forming.especially in the cold rolling of plate and strip, and a high resistance to damage.it is a good resistance to fatigue and stress corrosion, and good toughness.the alloy has the following composition, in weight (%) of 1.7 to 2.3 of li, cu of 1 to 1.5, 1.0 to 1.8 mg, 0.04 to 0.15 to 2 of zn, zr, fe, up to 15 up to 0.15 so.up to 0.5 m, up to 0.25 for cr, other each? a total of 0.05. 15, al and mg / cu. 1.5.the process comprises; the development, casting, homogenization, hot working, annealing and cold working, the possible solution, quenching.cold deformation and future income. it is characterized in that a homogenization between 450 and 550.degree.c for 12 to 48 hours.this alloy is used as a structural element, particularly in the aeronautical and space industries.