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Manufacturing technology for aluminum alloy plate

An aluminum alloy sheet and preparation process technology, applied in the field of non-ferrous metal material processing, can solve the problems of insufficient tension, high technical indicators, and difficulty in introduction, and achieve the effects of reducing residual stress, toughness and corrosion resistance, and improving quality.

Active Publication Date: 2017-10-10
广西南南铝加工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This level of large-scale tension stretching machine not only has high technical indicators, is expensive, but also is a sensitive product, which requires a huge investment and is difficult to introduce. At present, only a small number of large-scale aluminum alloy processing plants in my country are equipped with thousands of machines for producing high-performance aluminum alloy thick plates. Ton-level large tension stretching machine
When the thickness of the aluminum alloy sheet produced by the prior art is 80-200 mm, the effect of quenching residual stress relief is not good; when the thickness exceeds 200 mm, the tensile force of the stretching machine for the ultra-thick aluminum alloy sheet is not enough to effectively weaken the quenching residual. Stress, so the aluminum alloy ultra-thick plate produced by the existing technology has a large quenching residual stress and is easy to deform during machining

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A preparation process of an aluminum alloy plate, comprising the following steps:

[0033] (1) Homogenization: The mass percentage is composed of: Zn 4.5%~8.5%, Mg 1.0%~2.6%, Cu 0.0~2.0%, Zr0.05%~0.20%, and the balance is Al alloy plate material melting , carry out the degassing and slag removal process to reduce the concentration of hydrogen slag in the aluminum melt, and then remove the oxides and non-metallic inclusions in the aluminum melt through a filtration process, cast an aluminum alloy ingot and homogenize it;

[0034] (2) Machining: cut the homogenized aluminum alloy ingot from head to tail, and saw it into hot-rolled billets with a thickness of 400 mm and a width of 1500 mm;

[0035] (3) Preheating: heating the hot-rolled billet in step (2) at 350°C for 4 hours;

[0036] (4) Hot rolling: After the preheating is completed, the hot-rolled billet is rolled into a plate with a thickness of 80mm;

[0037] (5) Stretching: transfer the plate in step (4) to a stre...

Embodiment 2

[0044] A preparation process of an aluminum alloy plate, comprising the following steps:

[0045] (1) Homogenization: The mass percentage is composed of: Zn 7.5%~9.5%, Mg 1.5%~2.8%, Cu 0.05%~2.5%, Zr0.05%~0.25%, and the balance is Al alloy plate material melting , carry out the degassing and slag removal process to reduce the concentration of hydrogen slag in the aluminum melt, and then remove the oxides and non-metallic inclusions in the aluminum melt through a filtration process, cast an aluminum alloy ingot and homogenize it;

[0046] (2) Machining: Cut the homogenized aluminum alloy ingot from head to tail, and saw it into hot-rolled billets with a thickness of 600mm and a width of 2000mm;

[0047] (3) Preheating: heating the hot-rolled billet in step (2) at 450°C for 20 hours;

[0048] (4) Hot rolling: After the preheating is completed, the hot-rolled billet is rolled into a plate with a thickness of 300mm;

[0049] (5) Stretching: transfer the plate in step (4) to a st...

Embodiment 3

[0056] A preparation process of an aluminum alloy plate, comprising the following steps:

[0057] (1) Homogenization: The mass percentage is composed of: Zn 5.5%~9.5%, Mg 2.0%~2.8%, Cu 1.0~2.5%, Zr0.10%~0.25%, and the balance is Al alloy plate material melting , carry out the degassing and slag removal process to reduce the concentration of hydrogen slag in the aluminum melt, and then remove the oxides and non-metallic inclusions in the aluminum melt through a filtration process, cast an aluminum alloy ingot and homogenize it;

[0058] (2) Machining: Cut the head and tail of the homogenized aluminum alloy ingot, and saw it into a hot-rolled billet with a thickness of 500mm and a width of 1700mm;

[0059] (3) Preheating: heating the hot-rolled billet in step (2) at 400°C for 10 hours;

[0060] (4) Hot rolling: After the preheating is completed, the hot-rolled billet is rolled into a plate with a thickness of 200mm;

[0061] (5) Stretching: transfer the plate in step (4) to a ...

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Abstract

The invention relates to a manufacturing technology for an aluminum alloy plate. The manufacturing technology includes the following steps of homogenizing, machining, preheating, hot rolling, edge cutting and head and tail cutting, stretching, solid-solution quenching, stretching, aging, solid-solution quenching, stretching and aging. By means of the manufacturing technology for the aluminum alloy plate, harmful impurities in aluminum melt are removed through the gas removing and slag removing process and the filtering process, and the quality of a cast aluminum alloy ingot blank is improved; the quenching pressure, the cooling rate and the cooling temperature are accurately controlled in a staged manner according to the quenching cooling rule, and therefore three-level quenching is conducted, the quenching degree of the aluminum alloy plate is improved, and meanwhile the quenching residual stress is reduced to the minimum; and the total stretching rate in the step (5), the step (7) and the step (10) of the technology is not larger than 3%, step-by-step stretching is conducted, the aluminum alloy plate obtained through stretching is high in strength, good in toughness and resistant to corrosion, and meanwhile, the residual stress generated by the aluminum alloy plate in the quenching process is reduced.

Description

technical field [0001] The invention relates to the technical field of nonferrous metal material processing, in particular to a preparation process of an aluminum alloy plate. Background technique [0002] High-strength and high-toughness aluminum alloy sheets are widely used in aviation industry, military industry, civil industry and other fields. Especially in the aviation industry, aviation integral structural parts are usually processed by direct milling of high-strength aluminum alloy thick plates. In order to obtain high-performance aluminum alloy plates, the ingot must be rolled, quenched, pre-stretched and other processes. In this series of processes, there will be corresponding residual stress in the aluminum alloy plates. The processing deformation caused by the residual stress is The bottleneck problem in the field of aviation automation manufacturing seriously restricts the development and production of new aircraft. [0003] With the launch of the national "La...

Claims

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Application Information

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IPC IPC(8): C22C21/10C22C1/03C22F1/053
CPCC22C1/026C22C1/03C22C21/10C22F1/002C22F1/053
Inventor 李承波何克准张江斌周文标赵解扬
Owner 广西南南铝加工有限公司
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