Age forming method and mould for aluminum lithium alloy welding structural wallboard

Abstract

The invention relates to an age forming method and mould for aluminum lithium alloy welding structural wallboard and relates to the formation of integral aluminum lithium alloy welding structural wallboards and satisfied T8 state requirements on mechanical property and fracture toughness. The method is characterized in that a synchronous continuous heating and pressurizing method is utilized so that the integral aluminum lithium alloy welding structural wallboard has a stress age forming effect, so as to separate out a strengthening phase, the performances of strength and fracture toughness of the integral wallboard are improved, and moreover, the integral aluminum lithium alloy welding structural wallboard has stress relaxation and permanently deforms accordingly. The wallboard is prepared according to the following steps: 1, designing a forming mould shape; 2, clamping parts; 3, age forming; and 4, local correcting. The forming method provided by the invention has the characteristics of simple forming process, convenience in operation and good repeatability; a problem that the aluminum lithium alloy cannot be easily form a T8 state is effectively solved; and moreover, by utilizing the method, the forming precision of the integral wallboard can be improved, and the production period is shortened.

Description

technical field [0001] The invention relates to an aging forming method and a mold for an aluminum-lithium alloy welded structure wall plate, belonging to the technical field of heat treatment of metal materials. Background technique [0002] Aluminum-lithium alloy welded structural panels are generally used in high-load or alternating load environments such as aircraft fuselages and wings. In order to ensure safety within the service life, components must have high strength, fracture toughness, and good corrosion resistance. performance. In order to meet these requirements, aluminum-lithium alloy welded structural panels generally adopt the T8 state. However, the aluminum-lithium alloy in the T8 state has high strength and low elongation, and it is difficult to meet the forming requirements of large curvature; at the same time, the design goals of damage resistance and long life put forward higher requirements for aluminum-lithium alloy welded structural panels. The exist...

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Problems solved by technology

However, the aluminum-lithium alloy in the T8 state has high strength and low elongation, and it is difficult to meet the forming requirements of large curvature; at the same time, the design goals of damage resistance and long life put forward higher requirements for aluminum-lithium alloy welded structural panels. The existing cold forming has been basically unable to meet

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