High-thermal-stability wrought aluminium alloy and preparation method thereof

A technology of deformed aluminum alloy and high thermal stability, which is applied in the field of non-ferrous metals, can solve the problems that the thermal stability of deformed aluminum alloy has not been reported, and achieve high thermal stability and improve the effect of thermal stability

Active Publication Date: 2013-05-15
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are no reports at home and abroad on the compound addition of Er and

Method used

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  • High-thermal-stability wrought aluminium alloy and preparation method thereof
  • High-thermal-stability wrought aluminium alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] 1) Add Al-6wt.%Er and Al-4wt.%Zr master alloys to the molten aluminum, so that the element content in the melt is: erbium: 0.3%, zirconium: 0.3%, the rest is aluminum and unavoidable Impurities. When making aluminum alloy, high-purity aluminum ingots are added to the resistance furnace, the heating temperature is 750°C, and the intermediate alloy is added to the molten aluminum. The temperature of the molten metal is 850°C. After being fully stirred, it is poured into an iron mold. After the ingot is solidified, the ingot is quickly taken out and cooled to room temperature. The ingot size is: 200*100*35mm.

[0015] 2) For the cold-rolled deformation of the ingot in step 1), the height of the ingot before rolling is 35 mm, and the cold-rolled plate is made into a 3.5 mm thick plate, and the deformation is 90%.

[0016] 3) The deformed aluminum alloy in step 2) is annealed at different temperatures for 1 hour, and the annealing temperature is up to 600°C. At the same t...

Embodiment 2

[0018] Step 1) is the same as in Example 1, except that the alloy composition content is: erbium: 0.3%; zirconium: 0.4%; the rest is aluminum and unavoidable impurities. Step 2) is the same as in Example 1. Step 3) is the same as in Example 1.

Embodiment 3

[0020] Step 1) is the same as in Example 1, except that the alloy composition content is: erbium: 0.3%; zirconium: 0.6%; the rest is aluminum and unavoidable impurities. Step 2) is the same as in Example 1. Step 3) is the same as in Example 1.

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Abstract

The invention discloses a high-thermal-stability wrought aluminium alloy and a preparation method thereof, and belongs to the technical field of non-ferrous metals. The preparation method comprises the following steps: taking 0.3% of erbium, 0.3-0.6% of zirconium and the balance of aluminum and unavoidable impurities, smelting aluminum in a resistance furnace, adding an Er-Zr intermediate alloy into smelted aluminum at the temperature of 750-800 DEG C, heating the obtained object to 900 DEG C, carrying out stirring and slag removal on the heated object, standing and cooling a molten metal to 850 DEG C, casting the obtained product into a cast ingot by using an iron die, and after the cast ingot is solidified, quickly taking out the cast ingot, and cooling the cast ingot to room temperature through water cooling; carrying out face milling on the aluminium alloy cast ingot, carrying out cold rolling on the cast ingot on a rolling mill, and keeping the deformation of the cast ingot at 70-90%. After the wrought aluminium alloy with the components is subjected to annealing at a temperature of 375 DEG C for 150 hours, obvious recrystallization phenomenon still does not occur, so that the wrought aluminium alloy has good thermal stability.

Description

technical field [0001] The invention belongs to the technical field of non-ferrous metals, and specifically relates to the addition amount of Er and Zr alloy elements in aluminum and the preparation process of deformed aluminum alloys. The addition of Er and Zr can effectively improve the thermal stability of deformed aluminum alloys. technical background [0002] The survey results of the literature show that adding a trace amount of Er element to the aluminum alloy can diffuse and precipitate Al which maintains a coherent relationship with the aluminum matrix after aging treatment. 3 The Er secondary phase contributes to the strength of the alloy, but when the temperature is kept above 300°C, the precipitated Al 3 The Er phase will rapidly coarsen, making the dispersion strengthening effect almost disappear. The addition of Zr elements will improve the thermal stability of aluminum alloys, and the Al formed during aging 3 The Zr secondary precipitates can still maintain ...

Claims

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Application Information

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IPC IPC(8): C22C21/00C22F1/04
Inventor 黄晖朱静波聂祚仁文胜平高坤元王为
Owner BEIJING UNIV OF TECH
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