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Method for improving damage-tolerance property of 2,000-type aluminium alloy plate material

A technology of aluminum alloy plate and damage tolerance, which is applied in the field of metal material engineering, can solve the problems of narrow process window, complicated process technology, high equipment and operation technology requirements, and achieve energy saving, production efficiency improvement and fatigue crack rate reduction Effect

Active Publication Date: 2012-06-27
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process technology is complicated, and the process window is narrow, which requires very high equipment and operation technology

Method used

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  • Method for improving damage-tolerance property of 2,000-type aluminium alloy plate material
  • Method for improving damage-tolerance property of 2,000-type aluminium alloy plate material
  • Method for improving damage-tolerance property of 2,000-type aluminium alloy plate material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Production of qualified 2E12 alloy ingots, whose alloy composition meets Cu 4.0-4.5%, Mg 1.2-1.6%, Mn 0.45-0.70%, Cr≤0.05%, Zn≤0.15%, Si≤0.06%, Fe≤0.12% , Ti≤0.10%. Pre-cold rolling preparation after hot rough rolling and coiling; high temperature softening treatment is required before cold rolling and during cold rolling, the deformation between the two softening treatments is not higher than 35%, and the uncoiling cold rolling is to 0.8mm~8.0mm For any specification, the cold-rolled product is subjected to solution treatment, then cold-deformed and straightened, and then naturally aged to a stable state.

[0031] Its process route and process parameters are shown in Table 1. In Table 1, each number represents a process route and its process parameters and product performance indicators.

[0032] Table 1: Process route parameters and properties of 2E12 alloy plates with specifications of 0.8mm to 8.0mm

[0033]

[0034]

[0035] The process route and process p...

Embodiment 2

[0041] Produce qualified 2024 alloy ingots, whose alloy composition meets Cu 3.8-4.9%, Mg 1.2-1.8%, Mn 0.30-0.90%, Cr≤0.10%, Zn≤0.25%, Si≤0.50%, Fe≤0.50% , Ti≤0.15%. After hot rough rolling, the blank is hot finish rolled to any specification between 0.8mm and 8.0mm, and after hot rough rolling and coiling, it is prepared before cold rolling; high temperature softening treatment is required before and during cold rolling, and two softening treatments are required The amount of deformation between passes is not higher than 35%. It is decoiled and cold-rolled to any specification between 0.8mm and 8.0mm. After the cold-rolled product is solution treated, it is subjected to cold deformation leveling and straightening; then it is naturally aged to a stable state.

[0042] Its process route and process parameters are shown in Table 3. In Table 1, each number represents a process route and its process parameters and product performance indicators.

[0043] Table 3 Process route pa...

Embodiment 3

[0051] Production of qualified 2000 series alloy ingots, whose alloy composition meets Cu 3.2-3.8%, Mg 0.8-1.2%, Mn 0.30-0.90%, Cr≤0.10%, Zn≤0.25%, Si≤0.50%, Fe≤0.50 %, Ti≤0.15%. Pre-cold rolling preparation after hot rough rolling and coiling; high temperature softening treatment is required before cold rolling and during cold rolling, the deformation between the two softening treatments is not higher than 35%, and the uncoiling cold rolling is to 0.8mm~8.0mm For any specification, the cold-rolled product is subjected to solution treatment, then cold-deformed and straightened, and then naturally aged to a stable state.

[0052] Its process route and process parameters are shown in Table 5. In Table 1, each number represents a process route and its process parameters and product performance indicators.

[0053] Table 5 Process circuit parameters and properties of 2000 series alloy plates with specifications of 0.8mm to 8.0mm

[0054]

[0055] As can be seen from the abov...

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Abstract

The invention relates to a method for improving the damage-tolerance property of a 2,000-type aluminium alloy plate material. In the method, preferable hot-rolling outlet temperature, high-temperature softening treatment and smaller cold-rolling deformation in softening treatment process can be controlled, so that intercrystalline energy storage of the material is reduced, recrystallization degree is controlled and a malleableized texture is formed. By the method, the service life of the 2,000-type material such as 2,024, 2E12 and the like is prolonged by 2 to 4 times; the crack propagation rate is reduced to 1 / 4 to 1 / 2 of the original crack propagation rate; the production efficiency is improved; and the energy is further saved.

Description

technical field [0001] The invention relates to a method for improving the damage tolerance performance of 2000 series aluminum alloy plates, which belongs to the field of metal material engineering. Background technique [0002] In recent years, with the development of some high damage tolerance alloys such as 2524 and 2E12, it is also necessary to develop a process method to improve the damage tolerance performance of the material. [0003] Modern mechanical design pays more attention to low energy consumption and high life. In order to meet the needs of long endurance, high life and economy of transport machinery such as aircraft and ships, the concept of damage tolerance design has been developed. Aluminum alloy, as the main structural material of aircraft, generally accounts for more than 30% of the weight of the whole machine, and the highest can reach nearly 80%. Through this invention, the service life of 2000 series materials such as 2024 and 2E12 can be effectivel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/057C22C21/12
Inventor 冯朝辉杨守杰陈军洲伊琳娜臧金鑫张坤戴圣龙汝继刚刘铭龚澎
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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