Method for adjusting and controlling coarse second phase of 2219 aluminum alloy ring part

A technology for aluminum alloys and rings, applied in the field of regulating the coarse second phase of 2219 aluminum alloy rings, can solve the problems of difficult diffusion and dissolution of large-sized second phase particles, insufficient diffusion channels of copper elements, and significant dynamic recovery effect. Solve the effect of low local point performance, enhance aging precipitation power, and improve dissolution efficiency

Active Publication Date: 2019-08-20
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the dynamic recovery effect of aluminum alloy is significant under high temperature conditions, the dislocation density is low, the diffusion channel of copper element is insufficient, and the large-sized second phase particles are difficult to fully diffuse and dissolve, and there is still a small amount of coarse Al in

Method used

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  • Method for adjusting and controlling coarse second phase of 2219 aluminum alloy ring part
  • Method for adjusting and controlling coarse second phase of 2219 aluminum alloy ring part
  • Method for adjusting and controlling coarse second phase of 2219 aluminum alloy ring part

Examples

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Example Embodiment

[0036] Example 1 (medium and low temperature horse expansion + annealing + medium and low temperature ring rolling):

[0037] The process method of the present invention for regulating the coarse second phase of 2219 aluminum alloy ring, the manufacturing process is as figure 2 As shown, the process flow is as image 3 As shown, specifically including:

[0038] (1) Multi-directional forging billet: preheat the 2219 aluminum alloy ingot to 510℃, place it in the press, and use the seven-heading and six-draw multi-directional forging process to open the billet (such as figure 1 As shown, the steps in the dashed frame are performed twice), the single upsetting deformation is 65%, the final forging temperature is ≥400°C, and then the blank is rounded and punched.

[0039] (2) Medium and low temperature horse frame reaming: heat the punched 2219 aluminum alloy ring blank to 240°C and transfer it to the press, preheat the mold in contact with the blank to 200°C to carry out the horse frame ...

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Abstract

The invention discloses a method for adjusting and controlling the coarse second phase of a 2219 aluminum alloy ring part. The method comprises the processes of multi-direction forging cogging, medium-low-temperature shack reaming, high-temperature annealing, medium-low-temperature ring part rolling and heat treatment. The method adopts medium-low-temperature shack reaming+ high-temperature annealing and medium-low-temperature ring part rolling-solid solution, the coarse second phase is thoroughly crushed through the lower-temperature deformation shearing function, the dynamic recovery is suppressed by using the lower temperature condition to generate a high-density element diffusion misalignment channel, in the follow-up high-temperature annealing process, the thorough dissolution of thesecond phase after crushing is achieved, and the mechanical properties of the ring part are improved accordingly.

Description

technical field [0001] The invention belongs to the technical field of deformation heat treatment of metal materials, and in particular relates to a method for controlling the coarse 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...

Claims

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Application Information

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IPC IPC(8): C22F1/057B23P15/00
CPCB23P15/00C22F1/057
Inventor 易幼平黄始全郭万富毛献昌何海林
Owner CENT SOUTH UNIV
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