METHOD OF MANUFACTURE OF ARTICLES FROM ALUMINIUM ALLOYS CONTAINING LITHIUM Russian patent published in 1999 - IPC

FIELD: metallurgy. SUBSTANCE: method of manufacture of articles from aluminium alloys containing lithium and copper includes stepped homogenizing annealing carried out as follows: heating up to temperature exceeding by 10-40 C of temperature of minimum stability of solid solution within region of phase T2 (Al₆CuLi₃), holding for 3-30 h, cooling at rate of 3-60 C/h to temperature of 20-40 C below temperature of minimum stability of solid solution within region of T2 (Al₆CuLi₃), holding for 1-10 h, cooling to room temperature, heating up to temperature of 320-425 C, holding for 0.25-10 h with subsequent hot deformation, hardening, straightening and ageing. EFFECT: higher operate reliability of articles in structures. 5 cl, 1 tbl