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Al-Mg-Li-Zr-Er alloy

An al-mg-li-zr-er, alloy technology, applied in the field of metal alloys

Inactive Publication Date: 2004-03-17
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Examples

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example 1

[0012] Example 1: The Al-Mg-Li-Zr-0.05Er alloy is prepared by the ingot metallurgy method. The specific composition is shown in Table 1. The raw materials used are high-purity Al with a purity of 99.99%, high-purity Mg with a purity of 99.99%, and a purity of 99.99%. 99.99% high-purity Li and master alloys Al-3.6wt% Zr, Al-6.2wt% Er are batched according to the bulk density of the casting mold 10kg. Put 8818 grams of high-purity aluminum, 361 grams of Al-Zr master alloy and 81 grams of Al-6.2Er master alloy into Al 2 o 3 Crucible, and put it in a ZGG-0.025 vacuum induction furnace. After the vacuum degree is higher than 0.3Pa, turn on the power to raise the temperature of the material, until the solution temperature rises to 760 ° C, turn off the power, and keep the vacuum degassing. When the temperature of the solution drops to 710°C and the vacuum degree is above 0.3 Pa, argon gas of 200 mmHg is introduced, 540 grams of Mg and 200 grams of Li are added, and Li is wrapped wi...

example 2

[0013] Example 2: Al-Mg-Li-Zr-0.1Er alloy is prepared by ingot metallurgy, the specific composition is shown in Table 1, the raw materials used are high-purity Al with a purity of 99.99%, high-purity Mg with a purity of 99.99%, and a purity of 99.99%. 99.99% high-purity Li and master alloys Al-3.6wt% Zr, Al-6.2wt% Er are batched according to the bulk density of the casting mold 10kg. Put 8737 grams of high-purity aluminum, 361 grams of Al-Zr master alloy and 162 grams of Al-6.2Er master alloy into Al 2 o 3 Crucible, and put it in a ZGG-0.025 vacuum induction furnace. After the vacuum degree is higher than 0.3Pa, turn on the power to raise the temperature of the material, until the solution temperature rises to 760 ° C, turn off the power, and keep the vacuum degassing. When the temperature of the solution drops to 710°C and the vacuum degree is above 0.3 Pa, argon gas of 200 mmHg is introduced, 540 grams of Mg and 200 grams of Li are added, and Li is wrapped with aluminum foi...

example 3

[0014] Example 3: Al-Mg-Li-Zr-0.2Er alloy is prepared by ingot metallurgy method. The specific composition is shown in Table 1. The raw materials used are high-purity Al with a purity of 99.99%, high-purity Mg with a purity of 99.99%, and a purity of 99.99%. 99.99% high-purity Li and master alloys Al-3.6wt% Zr, Al-6.2wt% Er are batched according to the bulk density of the casting mold 10kg. Put 8575 grams of high-purity aluminum, 361 grams of Al-Zr master alloy and 324 grams of Al-6.2Er master alloy into Al 2 o 3 Crucible, and put it in a ZGG-0.025 vacuum induction furnace. After the vacuum degree is higher than 0.3Pa, turn on the power to raise the temperature of the material, until the solution temperature rises to 760 ° C, turn off the power, and keep the vacuum degassing. When the temperature of the solution drops to 710°C and the vacuum degree is above 0.3 Pa, argon gas of 200 mmHg is introduced, 540 grams of Mg and 200 grams of Li are added, and Li is wrapped with alumi...

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Abstract

The present invention relates to alloy technology, and is one kind of Al-Mg-Li-Zr-Er alloy. The Al-Mg-Li-Zr-Er alloy consists of: Mg 4.9-5.5 wt%, Li 1.8-2.1 wt%, Zr 0.08-0.15 wt% and Er 0.05-0.70 wt% except Al. The key point of the present invention is addition of RE element Er, and the Al-Mg-Li-Zr-Er alloy is prepared via adding intermediate Al-Er alloy into 1420 alloy. Compared with 1420 alloy, the Al-Mg-Li-Zr-Er alloy has fine casting tissue, relatively high strength, less difference in plasticity and not greatly raised cost. Like 1420 alloy, the alloy of the present invention may be used widely in aeronautics, astronautics, high speed train, automobile and other fields.

Description

1. Technical field [0001] The invention belongs to the technical field of metal alloys. 2. Background technology [0002] Aluminum-lithium alloys are gaining increasing attention in the aerospace industry due to their low density and high elastic modulus. Among many types of aluminum-lithium alloys, the Al-Mg-Li system represented by 1420 (Mg4.9-5.5wt%, Li1.8-2.1wt%, Zr0.08-0.15wt%, Al as the balance) Alloys are the best for weight reduction. However, this alloy still has problems such as poor toughness, obvious anisotropy and insufficient strength. In order to further improve the performance of the alloy, the former Soviet scientists (according to the articles of Wei Jianfeng, He Ming, etc., the research progress of aluminum-lithium alloys, rare metal materials and engineering, 1994, 2, Vol.23) added the method of trace rare earth element Sc It was improved, and alloys such as 1421 and 1423 with more beneficial properties were developed. Compared with 1420 alloy, 1421 a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/06
Inventor 聚祚仁金头男付静波徐国富杨军军邹景霞秦肖左铁镛
Owner BEIJING UNIV OF TECH
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