Large size aluminum alloy keelblook homogenization forging improving method

An aluminum alloy ingot casting and homogenization technology, which is applied in the field of metal forging technology, can solve the problems that the product cannot meet the use requirements, the overall performance is insufficient, and the mechanical performance gap is very obvious.

Inactive Publication Date: 2015-06-24
WUXI PAIKE HEAVY CASTING & FORGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Large-scale aluminum alloy ingots have unavoidable metallurgical defects such as porosity, porosity, and shrinkage cavities during casting and crystallization. Aluminum alloy forgings manufactured by traditional methods have insufficient overall performance due to insufficient forging deformation and gaps in mechanical properties in all directions of the forgings. Obviously, large aluminum alloy forgings for aerospace are subjected to various complex loads such as axial compression, axial tension, internal pressure, external pressure, and local stress concentration, which have extremely high performance requirements for products, which cannot be met by products manufactured by traditional processes. Requirements

Method used

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  • Large size aluminum alloy keelblook homogenization forging improving method

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Embodiment 1

[0035] The method for homogenizing and reforming large-scale aluminum alloy ingots in this embodiment includes the following processing steps:

[0036] In the first step, the blank is prepared by an ingot casting method;

[0037] The second step is to heat the ingot blank, and the heating temperature is 40°C under the solid solution temperature;

[0038] In the third step, the ingot blank is axially upset, and the axial upsetting deformation of the ingot is controlled at 50%;

[0039] In the fourth step, the ingot is axially elongated, and the axial elongation deformation of the ingot is controlled at 40%;

[0040] In the fifth step, the ingot is axially upset, and the axial upsetting deformation of the ingot is controlled at 55%;

[0041] The sixth step is to elongate the ingot in the radial X direction, and the elongation deformation in the radial X direction of the ingot is controlled by 40%;

[0042] The seventh step is to upset the radial X direction of the ingot, and ...

Embodiment 2

[0049] The method for homogenizing and reforming large-scale aluminum alloy ingots in this embodiment includes the following processing steps:

[0050] In the first step, the blank is prepared by ingot casting, and the blank is a cylinder with a diameter of 588mm and a height of 1685mm;

[0051] The second step is to heat the blank with a cylindrical structure, and the heating temperature is 40°C under the solid solution temperature;

[0052] The third step is to axially upset the ingot blank into a cylinder with a diameter of 858mm and a height of 850mm;

[0053] In the fourth step, the ingot is axially elongated, and the ingot is axially elongated into a cuboid with an axial length of 1400mm, an X-direction height of 572mm, and a Y-direction width of 572mm;

[0054] In the fifth step, the ingot is axially upset, and the ingot is axially upset into a cuboid with an axial length of 808 mm, a height of 700 mm in the X direction, and a width of 808 mm in the Y direction;

[00...

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Abstract

The invention relates to a large size aluminum alloy keelblook homogenization forging improving method. Upsetting and drawing forging improving are performed on aluminum alloy keelblook in every direction by using a hydraulic machine, after the overall homogenization forging machining is performed, the performance of the large size aluminum alloy keelblook and the uniformity of the overall performance are remarkably improved, after the overall forging improving machining, the mechanical property and the corrosion resistance of forge pieces are strengthened, the defects of air holes, looseness and shrinkage cavities in an original keelblook are effectively improved and eliminated, the machined forge pieces can bear various complex loads, such as shaft load, shaft pulling, inner pressure, outer pressure, local stress concentration and the like in work.

Description

technical field [0001] The invention relates to the field of metal forging technology, in particular to a method for homogenizing and reforming large-scale aluminum alloy ingots. Background technique [0002] Aluminum alloy is widely used in various aerospace products as a lightweight and high-strength structural material. With the rapid development of my country's aerospace industry, especially the establishment of heavy-duty launch vehicles, aluminum alloy products with high performance and high homogeneity The demand for large forgings is huge. Ingots are produced by pouring molten metal into permanent or reusable molds, and after solidification, these ingots (or bars, slabs or billets, depending on the container) are further machined into multiple new shape. The ingot is a cast structure with large columnar crystals and a loose center. Therefore, it is necessary to break the columnar grains into fine grains through large plastic deformation, and loosen and compact them...

Claims

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Application Information

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IPC IPC(8): B21J5/06B21J5/08
Inventor 刘智
Owner WUXI PAIKE HEAVY CASTING & FORGING
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