METHOD OF HEAT TREATMENT OF ALUMINUM-LITHIUM ALLOY AND METHOD OF STRUCTURE FORMATION

摘要

FIELD: methods of heat treatment of aluminum-lithium alloy and formation of structures. SUBSTANCE: method includes carrying out at least two stages of artificial ageing. The first stage is carried out at 150 C and below that promotes precipitation of phase δ′. The method of structure formation from at least two members at least one of which contains aluminium-lithium alloy includes stage of formation of prevulcanization unit of members and adhesive, and heat treatment of this unit with subsequent performance of at least two stages of ageing. The first stage is carried out in the first temperature range and at least one further step is carried out in successively reduced temperature range. Vulcanization of adhesive is carried out during the time of at least one of stages of artificial ageing. EFFECT: higher temperature stability and strength of alloys. 12 cl, 4 dwg, 19 tbl