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A room temperature forming method of 2198 aluminum-lithium alloy sheet

A technology of aluminum-lithium alloy and plate, which is applied in the field of room temperature forming of 2198 aluminum-lithium alloy plate, can solve the problems of high cost and low efficiency, and achieve the effect of improving efficiency, high efficiency and high strength

Active Publication Date: 2019-03-12
SHENYANG AEROSPACE UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a room temperature forming method of 2198 aluminum-lithium alloy sheet material, which overcomes the shortcomings of existing forming technology such as high cost and low efficiency, by performing room temperature forming on 2198 aluminum-lithium alloy sheet material before aging treatment, the plastic forming Combined with the necessary pre-deformation before aging, it overcomes the difficulty of poor plasticity of 2198 aluminum-lithium alloy, increases the strength of the part, effectively reduces the processing cost, improves the geometric accuracy of the part, and has the advantages of simple process, low equipment requirements and low cost. Advantages such as low cost and improved part accuracy

Method used

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  • A room temperature forming method of 2198 aluminum-lithium alloy sheet

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Effect test

Embodiment 1

[0035] A room temperature forming method of 2198 aluminum-lithium alloy plate, its process flow chart is as follows figure 1 As shown, it specifically includes the following steps:

[0036] Step 1, solid solution treatment

[0037] (1) Select a 2198 aluminum-lithium alloy plate with a thickness of 2.5mm, and the state is T8, and then cut the material according to the part drawing, check whether there are deep scratches and roughness on the surface, and clean the plate;

[0038] (2) Install the plate forming mold and lubricate the mold;

[0039] (3) Choose a conventional heat treatment furnace, raise the temperature of the furnace to 510°C and keep it warm for 1 hour. After the furnace temperature is stable, put the cleaned 2198 aluminum-lithium alloy plate into the heating furnace for heat preservation. The heat preservation time is 2 hours, and the solid solution is strictly controlled. Time prevents the degree of solid solution from being affected or the grains from growin...

Embodiment 2

[0052] A method for forming a 2198 aluminum-lithium alloy plate at room temperature, comprising the following steps:

[0053] Step 1, solid solution treatment

[0054] (1) Select a 2198 aluminum-lithium alloy plate with a thickness of 4mm and the state is T8, and then cut the material according to the part drawing, check whether there are deep scratches and roughness on the surface, and clean the plate;

[0055] (2) Install the plate forming mold and lubricate the mold;

[0056] (3) Choose a conventional heat treatment furnace, raise the furnace temperature to 500°C and keep it warm for 2 hours. After the furnace temperature is stable, put the cleaned 2198 aluminum-lithium alloy plate into the heating furnace for 1 hour, and strictly control the solid solution Time prevents the degree of solid solution from being affected or the grains from growing too much;

[0057] Step two, quenching treatment

[0058] Quickly take out the plate after solid solution from the furnace and ...

Embodiment 3

[0069] A method for forming a 2198 aluminum-lithium alloy plate at room temperature, comprising the following steps:

[0070] Step 1, solid solution treatment

[0071] (1) Select a 2198 aluminum-lithium alloy plate with a thickness of 0.5mm and the state is T8, and then cut the material according to the part drawing, check whether there are deep scratches and roughness on the surface, and clean the plate;

[0072] (2) Install the plate forming mold and lubricate the mold;

[0073] (3) Choose a conventional heat treatment furnace, raise the furnace temperature to 530°C and keep it warm for 1 hour. After the furnace temperature stabilizes, put the cleaned 2198 aluminum-lithium alloy plate into the heating furnace for 0.5 hours, and strictly control the solid The dissolution time prevents the degree of solid solution from being affected or the grains from growing excessively;

[0074] Step two, quenching treatment

[0075] Quickly take out the plate after solid solution from t...

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Abstract

The invention provides a room-temperature forming method for a 2198 aluminum-lithium alloy panel. The method includes the following steps that firstly, solution treatment is conducted, wherein a panel is placed in a heating furnace, and the heat preservation time is controlled; secondly, quenching treatment is conducted, wherein the panel subjected to solution treatment is rapidly transferred into low-temperature water, the transfer time is strictly controlled, and it is ensured that the whole panel is completely quenched; thirdly, room-temperature forming is conducted, wherein the panel is rapidly taken out of the water, and leveling and forming of the panel are completed within a short period of time; fourthly, natural aging is conducted, and the panel stands for 3-9 days; fifthly, manual aging is conducted, wherein a part is placed in the heating furnace, and heat preservation is conducted for a certain period of time; and sixthly, the part is taken out and subjected to edge cutting and surface treatment, and a 2198 aluminum-lithium alloy panel part is obtained. According to the room-temperature forming method, by conducting room-temperature forming before aging treatment is conducted on the 2198 aluminum-lithium alloy panel, the plastic forming and the necessary pre-forming before aging are combined together, the difficulty that plasticity of a 2198 aluminum-lithium alloy is poor is avoided, strength of the part is increased, the processing cost is effectively reduced, the geometric precision of the part is improved, and potential of large-scale industrialized production is achieved.

Description

Technical field: [0001] The invention belongs to the technical field of metal plate processing, and in particular relates to a room-temperature forming method of a 2198 aluminum-lithium alloy plate. Background technique: [0002] Aluminum-lithium alloy has high specific strength and high specific modulus. If it is used to replace traditional aluminum alloys to produce aircraft sheet metal parts, it can significantly reduce structural quality, improve flight performance, and save costs. Therefore, it has received extensive attention and is considered to be the most ideal structural material for aerospace, with a broad application space. 2198 Al-Li alloy is a representative new third-generation Al-Li alloy, which has high strength, good plasticity, and low crack growth rate, and has the potential to develop room temperature plastic forming technology. However, the plasticity of aluminum-lithium alloy sheet at room temperature is poor, and it is easy to crack during plastic pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/057
CPCC22F1/002C22F1/057
Inventor 赵天章张凌云高铁军
Owner SHENYANG AEROSPACE UNIVERSITY
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