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Aluminum alloy material and preparation method thereof

An aluminum alloy material and aluminum alloy technology, applied in the field of alloy materials, can solve the problems of increasing the production cost of alloy materials, unsatisfactory anodic oxidation performance, and high copper market price, etc., and achieve ideal anodic oxidation performance, increased strength, and reduced production cost Effect

Active Publication Date: 2011-12-21
宁波环球输变电设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the traditional 2024 has poor corrosion resistance, is prone to cracks during welding, and has poor extrusion performance; due to the high copper content, it will also cause unsatisfactory anodic oxidation performance, and it is not easy to oxidize and color its surface, increasing oxidation defects
Moreover, the 2024 aluminum-copper-magnesium hard aluminum alloy material has a high copper content, and the market price of copper is very expensive, which will undoubtedly increase the production cost of the alloy material
[0004] In addition, 2024 has strict requirements on the heat treatment process, especially the heat treatment process requires quenching. The quenching process consumes a lot of electricity and energy, which increases production costs and is not conducive to energy saving and emission reduction.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The composition of the aluminum alloy material is: copper 1%, magnesium 1.3%, zinc 6.2%, chromium 0.15%, titanium 0.1%, iron 0.2%, silicon 0.2%, manganese 0.1%, and the balance is aluminum.

[0018] (1) According to the normal cast aluminum alloy smelting process, first mix and heat the components according to the formula ratio to 730~750°C to melt, and then pour at 710~725°C to obtain aluminum alloy billets (conventional technology in the industry);

[0019] (2) Then turn the aluminum alloy casting slab, and after turning, carry out hot extrusion with an extrusion machine. The temperature of the aluminum alloy casting slab during extrusion is 420~480°C, and then put it in water for 0.5~1 hour, according to actual needs Then use a stretching machine to stretch the billet, so that the length of the product is stretched, and the stretching amount is 1-2.5%, and then the product is cut, packaged, and shipped.

Embodiment 2

[0021] The composition of the aluminum alloy material is: copper 1.2%, magnesium 1.4%, zinc 6.5%, chromium 0.2%, titanium 0.2%, iron 0.3%, silicon 0.4%, manganese 0.3%, and the balance is aluminum. The preparation method is the same as in Example 1.

Embodiment 3

[0023] The composition of the aluminum alloy material is: copper 0.7%, magnesium 1%, zinc 6%, chromium 0.05%, titanium 0.05%, iron 0.1%, silicon 0.1%, manganese 0.01%, and the balance is aluminum. The preparation method is the same as in Example 1.

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Abstract

The invention discloses an aluminum alloy material which is characterized in that the material consists of the following components by weight percent: 0.6-1.3% of copper, 0.9-1.6% of magnesium, 5.3-6.7% of zinc, 0.03-0.2% of chromium, 0.03-0.2% of titanium, not more than 0.5% of iron, not more than 0.5% of silicon, not more than 0.3% of manganese and the balance of aluminum. The invention also discloses a preparation method of the aluminum alloy material. The aluminum alloy disclosed by the invention has the advantages of good oxidation performance, low copper content, low production cost, good extrusion performance, good corrosion resistance, difficult generation of cracking and good overall mechanical properties.

Description

technical field [0001] The invention relates to the technical field of alloy materials, in particular to an aluminum alloy material and a preparation method thereof. Background technique [0002] 2024 is a typical hard aluminum alloy in the aluminum-copper-magnesium system. Its composition is relatively reasonable and its comprehensive performance is good. This alloy is produced in many countries and is the largest amount of duralumin. The alloy is characterized by high strength and certain heat resistance, and can be used as working parts below 150°C. At temperatures above 125°C, the strength of 2024 alloy is higher than that of 7075 alloy. The formability is relatively good in the hot state, annealed and newly quenched state, and the heat treatment strengthening effect is remarkable. It is widely used in aircraft structures, rivets, truck hubs, propeller components and other structural parts. [0003] However, the traditional 2024 has poor corrosion resistance, is prone...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/10C22F1/053
Inventor 胡才国
Owner 宁波环球输变电设备有限公司
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