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Deformation control method for difficult-to-deform high-elongation aluminum alloy

A high elongation and deformation control technology, applied in the forging field of aluminum alloy forgings, can solve the problems of low qualification rate, abnormal material texture, mechanical properties that do not meet the requirements of design and use, and achieve the effect of sufficient deformation and improved performance.

Pending Publication Date: 2022-03-25
WUXI PAIKE HEAVY CASTING & FORGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of aluminum alloy has a high degree of alloying and large anisotropy of mechanical properties. When manufacturing ring-shaped forgings, its height is in the direction of compression, and it is easy to cause abnormal material texture due to excessive deformation, and the mechanical properties are often not satisfactory. Design use requirements, low pass rate

Method used

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  • Deformation control method for difficult-to-deform high-elongation aluminum alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Step S1: Prepare a blank, the size of which is Φ800mm×1600mm.

[0028] Step S2: The forging is re-forged in three directions. The deformation of each fire in the longitudinal and transverse directions is controlled at 40-45%, and the deformation of each fire in the high direction is controlled at 30-35%. After the re-forging, the forging is punched. : Φ1230mm×Φ380mm×700mm.

[0029] Step S3: Carry out expansion and elongation of the forging, the size of the forging is Φ1400mm×Φ1085mm×1220mm, and the deformation amount of each fire is controlled to be 8-12%.

[0030] Step S4: Carry out ring grinding on the forging, and carry out ring rolling for multiple fires, the size of the forging is Φ2205mm×Φ2021mm×1220mm, and the deformation amount of each fire is controlled to be 8-12%. In this embodiment, the first firing ring: the instantaneous size of the forging is Φ1500mm×Φ1213mm×1220mm, and the deformation is 10.87%; the second firing ring: the instantaneous size of the forg...

Embodiment 2

[0036] The steps different from Embodiment 1 are:

[0037] Step S5: The forging is subjected to solution quenching. It includes two stages of constant temperature, the first stage: constant temperature of 472°C, followed by heat preservation for 2 hours, the second stage: constant temperature of 483°C, and then heat preservation for 4.5 hours. The quenching water temperature is controlled at 60°C.

[0038] Step S6: Artificial aging of the forgings, including two stages of constant temperature, the first stage: constant temperature of 121°C, holding for 7 hours, the second stage: raising the temperature to 185°C, and then holding for 9 hours, after which the forgings are immediately taken out of the furnace and cooled with water at a temperature of 35°C.

Embodiment 3

[0040] The steps different from Embodiment 1 are:

[0041] Step S5: The forging is subjected to solution quenching. It includes two stages of constant temperature, the first stage: constant temperature of 475°C, followed by 3 hours of heat preservation, the second stage: constant temperature of 485°C, and then heat preservation of 5 hours. The quenching water temperature is controlled at 70°C.

[0042] Step S6: Artificial aging of the forgings, including two stages of constant temperature, the first stage: constant temperature of 125°C, holding for 8 hours, the second stage: raising the temperature to 191°C, and then holding for 10 hours, after which the forgings are immediately taken out of the furnace and cooled with water at a temperature of 40°C.

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Abstract

The invention discloses a deformation control method for a difficult-to-deform high-elongation aluminum alloy. According to the technical scheme, the deformation control method comprises the following steps that S1, a blank is prepared; s2, three-direction modified forging is carried out, the deformation amount of each heating number in the longitudinal direction and the transverse direction is controlled to range from 40% to 45%, and the deformation amount of each heating number in the height direction is controlled to range from 30% to 35%; s3, horse expansion and drawing-out are conducted, and the deformation amount of each heating number is controlled to be 8%-12%; s4, ring grinding is conducted, and the deformation amount of each heating number is controlled to be 8%-12%; s5, solid solution quenching is conducted, specifically, in the first stage, the temperature is set to be 470-475 DEG C, and in the second stage, the temperature is set to be 480-485 DEG C; s6, artificial aging is conducted, specifically, in the first stage, the temperature is set to be 118-125 DEG C, and in the second stage, the temperature is increased to 174-191 DEG C; the method has the advantages that the overall deformation of the forge piece and the deformation of each heating number in some directions are controlled, and a proper heat treatment system is matched, so that the material strength is improved, the material plasticity is greatly improved, the anisotropy is weakened, and the material meets various required mechanical property index requirements.

Description

technical field [0001] The invention relates to the field of forging aluminum alloy forgings, in particular to a method for controlling deformation of a difficult-to-deform high-elongation aluminum alloy. Background technique [0002] With the development of our country's economic and industrial strength, our country is already one of the aerospace powers. But development not only brings opportunities, but also brings more challenges. With the improvement of aircraft and spacecraft performance indicators, the requirements for materials are becoming more and more stringent. Difficult-to-deform and easily-damaged aluminum alloys, as the latest generation of ultra-high-strength aluminum alloys, have been widely used in the aerospace field. The aerospace field has high requirements on the mechanical properties of products, and needs to meet the requirements in the vertical, horizontal, and high directions at the same time. This type of aluminum alloy has a high degree of alloyi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J5/00B21H1/06C21D9/40C22F1/053C22C21/10C21D1/18
CPCB21J5/002B21H1/06C21D9/40C22F1/053C22C21/10C22F1/002
Inventor 刘其源蒋小飞艾志斌何涛吴久喜
Owner WUXI PAIKE HEAVY CASTING & FORGING
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