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Forging method for controlling second phase of 2219 aluminum alloy ring piece

A technology for aluminum alloys and rings, applied in metal rolling, metal processing equipment, etc., can solve problems such as stress concentration, reduction of aging precipitation power, and reduction of alloy plasticity

Pending Publication Date: 2022-04-12
GUIZHOU ANDA AVIATION FORGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Al 2 Cu particles are hard and brittle intermetallic compounds, coarse Al 2 Cu particles are prone to stress concentration and crack initiation, which will lead to premature failure of the material due to stress concentration during stretching, reducing the plasticity of the alloy
Coarse Al 2 Cu particles will consume a large amount of Cu atoms, which will reduce the concentration of copper atoms in the aluminum matrix, and the aging precipitation power will decrease, resulting in a decrease in material strength, making it difficult to meet the high performance requirements of aerospace ring parts

Method used

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Comparison scheme
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specific Embodiment approach

[0018] The chemical composition of the 2219 aluminum alloy of the present invention is as follows: Cu content is 6.8%, Mg content is 0.02%, Mn content is 0.20%, Zn content is 0.10%, Ti content is 0.02%, and The amount of V is 0.15%, the amount of Zr is 0.10%, the amount of Fe is 0.30%, the amount of Si is 0.20%, and the balance is aluminum.

[0019] The steps of this method are as follows:

[0020] (1) Multi-directional forging billet: Preheat the 2219 aluminum alloy ingot to 510°C, place it in the press, and adopt the seven-upsetting and six-drawing multi-directional forging process to open the billet. The deformation of a single upsetting is 65%, and the final forging The temperature is ≥400°C, and then the billet is rounded and punched.

[0021] (2) Medium and low temperature saddle reaming: heat the punched 2219 aluminum alloy ring billet to 240°C, transfer it to a press, preheat the mold in contact with the billet to 200°C, and carry out saddle reaming; extrude The radi...

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PUM

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Abstract

The invention discloses a forging method for controlling a second phase of a 2219 aluminum alloy ring piece, which is characterized by comprising the processes of multidirectional forging cogging, medium and low temperature trestle reaming, high temperature annealing, medium and low temperature ring piece rolling and heat treatment. Medium-low temperature trestle reaming and high-temperature annealing and medium-low temperature ring piece rolling and solid solution are adopted, a coarse second phase is fully crushed through the low-temperature deformation and strong shearing effect, dynamic recovery is inhibited through the low-temperature condition, a high-density element diffusion dislocation channel is generated, in the subsequent high-temperature annealing process, full dissolution of the crushed second phase is achieved, and the high-temperature annealing effect is achieved. The mechanical property of the ring piece is improved.

Description

technical field [0001] The invention relates to a blanking method, in particular to a forging method for controlling the second phase of a 2219 aluminum alloy ring. Background technique [0002] 2219 aluminum alloy is Al-Cu series, heat treatment strengthened aluminum alloy. The alloy has the characteristics of high specific strength, good mechanical properties at low temperature and high temperature, and good welding performance, and has been widely used in the aerospace field. Among them, the transition ring of the launch vehicle storage tank is an important application of 2219 aluminum alloy. The ring is used to connect the barrel section of the storage tank, the front and rear bottoms, and the inter-box section of the rocket. It is a key part of force transmission and requires extremely high mechanical properties. The copper content of 2219 aluminum alloy is 5.8% to 6.8%, which exceeds the maximum solubility of copper atoms in the aluminum matrix and will form Al 2 Cu...

Claims

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Application Information

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IPC IPC(8): C22F1/04B21J5/10B21H1/06
Inventor 欧阳斌夏春林陈明
Owner GUIZHOU ANDA AVIATION FORGING
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