PRODUCT FROM Al-Cu-Li-ALLOY SUITABLE FOR USE IN AIRCRAFT AND AEROSPACE ENGINEERING Russian patent published in 2017 - IPC C22C21/12 C22F1/57 

FIELD: metallurgy.

SUBSTANCE: invention relates to the products of an aluminium alloy of the type Al-Cu-Li and can be used as structural components in aircraft, aerospace, etc. 1. An aluminium alloy product comprising, by wt %: Cu 3.4-5.0, Li 0.9-1.7, Mg 0.2-0.8, Ag 0.1-0.8, Mn 0.1-0.9, Zn <0 1, Zr 0.05-0.3, Cr 0.05-0.3, 0.03-0.3 Ti, Sc 0.05-0.4, optionally Hf 0.05-0.4, Fe <0.15, Si <0.5, aluminium and unavoidable impurities. The product manufacturing method of the aluminium alloy includes moulding the preform, heating and/or homogenizing the cast billet, hot working pressure, optionally cold working, heat treatment for solid solution (TSS), wherein the TSS is carried out at a temperature and time sufficient to place into solid solution soluble components in the aluminium alloy, cooling the TSS billet optionally treating the cooled TSS billet to relieve stresses and aging.

EFFECT: preparation of products made of aluminium alloys with high fracture toughness and high strength.

14 cl, 3 tbl, 1 ex