Ultralight flame-retardant and high-damping Al-Mg-Li-Sn aluminum lithium alloy

An aluminum-lithium alloy, al-mg-li-sn technology, applied in the field of alloys, can solve problems such as the inability to meet the requirements of anti-combustion performance, achieve the improvement of service life and mechanical properties at high temperature, reduce the amount of alloying elements used, and achieve flame retardancy. The effect of element content reduction

Inactive Publication Date: 2018-02-09
GUANGZHOU YUZHI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as a structural material, it is far from enough to meet the requirements of only having combustion resistance during smelting. More importantly, the final aluminum-lithium alloy product must also have satisfactory mechanical strength, at least reaching the level commonly used. Mechanical properties of Al-Li alloys
However, it must be noted that aluminum-lithium alloys are not currently the lightest alloy structural materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] An ultra-light, flame-retardant and high-damping Al-Mg-Li-Sn aluminum-lithium alloy with 710-degree melting. In terms of weight percentage, the chemical composition of the alloy is: Li: 6.4wt.%, Mg: 11.3wt.%, Sn: 2.6wt.%, Sr: 2.8wt.%, Ca: 0.9wt.%, Ge: 0.6wt .%, Zr: 0.2wt.%, Pr: 0.1wt.%, S: 0.5wt.%, B: 1.3wt.%, the balance is aluminum. The preparation method of the alloy: add the above-mentioned raw materials into the induction furnace under the atmospheric environment, and use a silicon carbide crucible. Induction heating to 710 degrees to form an alloy solution, and use the electromagnetic effect to fully stir for about 10 minutes. The alloy liquid is kept at 710 degrees for 10 minutes and cast into the equipment at the same level as the hot top for semi-continuous casting, and the ingot moving speed is 8m / min. The ingot was subjected to deformation treatment at room temperature, and the rolling reduction in each pass was 12%. Every 3 passes of rolling requires an i...

Embodiment 2

[0021]A 730-degree smelting ultra-light flame-retardant high-damping Al-Mg-Li-Sn aluminum-lithium alloy. In terms of weight percentage, the chemical composition of the alloy is: Li: 7.2wt.%, Mg: 8.5wt.%, Sn: 2.7wt.%, Sr: 2.3wt.%, Ca: 0.9wt.%, Ge: 0.6wt .%, Zr: 0.4wt.%, Pr: 0.1wt.%, S: 0.5wt.%, B: 1.2wt.%, the balance is aluminum. The preparation method of the alloy: add the above-mentioned raw materials into the induction furnace under the atmospheric environment, and use a silicon carbide crucible. Induction heating to 730 degrees to form an alloy solution, and use the electromagnetic effect to fully stir for about 10 minutes. The alloy liquid is kept at 730 degrees for 10 minutes and cast into the equipment at the same level as the hot top for semi-continuous casting, and the ingot moving speed is 9m / min. The ingot was subjected to deformation treatment at room temperature, and the rolling reduction in each pass was 13%. Every 3 passes of rolling requires an intermediate ...

Embodiment 3

[0024] A 780-degree melting ultra-light flame-retardant high-damping Al-Mg-Li-Sn aluminum-lithium alloy. In terms of weight percentage, the chemical composition of the alloy is: Li: 7.2wt.%, Mg: 8.6wt.%, Sn: 2.7wt.%, Sr: 2.6wt.%, Ca: 0.8wt.%, Ge: 0.7wt .%, Zr: 0.2wt.%, Pr: 0.1wt.%, S: 0.5wt.%, B: 1.2wt.%, the balance is aluminum. The preparation method of the alloy: add the above-mentioned raw materials into the induction furnace under the atmospheric environment, and use a silicon carbide crucible. Induction heating to 780 degrees to form an alloy solution, and use the electromagnetic effect to fully stir for about 10 minutes. The alloy liquid is kept at 780 degrees for 10 minutes and cast into the equipment at the same level as the hot top for semi-continuous casting, and the ingot moving speed is 9m / min. The ingot was subjected to deformation treatment at room temperature, and the rolling reduction in each pass was 12%. Every 3 passes of rolling requires an intermediate ...

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Abstract

The invention discloses an ultra-light flame-retardant high-damping Al-Mg-Li-Sn aluminum-lithium alloy and a processing technology thereof. In terms of weight percentage, the chemical composition of the alloy is: Li: 6.0‑8.0wt.%, Mg: 8.0‑12.0wt.%, Sn: 2.0‑3.0wt.%, Sr: 2.0‑4.0wt.%, Ca: 0.5 ‑1.0wt.%, Ge: 0.5‑0.8wt.%, Zr: 0.2‑0.6wt.%, Pr: 0.1‑0.2wt.%, S: 0.4‑0.8wt.%, B: 1.2‑1.5wt.% , and the balance is aluminum. The material has the mechanical properties of traditional aluminum-lithium alloys, and has low density and high damping properties that traditional aluminum-lithium alloys do not have: SDC=3-10%, and traditional materials are about SDC=0.5-0.8%.

Description

technical field [0001] The invention relates to the technical field of alloys, in particular to an aluminum-lithium alloy. Background technique [0002] Lithium is the lightest metal element in the world. When lithium is added to aluminum alloy as an alloying element, an aluminum-lithium alloy is formed. Aluminum-lithium alloy is a very light metal structure material with a density of only 2.4-2.6g / cm 3 . Generally speaking, every 1wt.% lithium added to aluminum alloy can reduce the density of aluminum alloy by 3% and increase the modulus by 6%. After adding metallic lithium, not only can the specific gravity of the alloy be reduced and the rigidity increased, but the aluminum-lithium alloy still has good corrosion resistance, fatigue resistance and suitable ductility. [0003] As a very light metal structure material in the world today, aluminum-lithium alloy has excellent mechanical properties of high specific stiffness and high specific strength, high damping performan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/06C22C1/02C22F1/047C22F1/02
CPCC22C21/06C22C1/026C22C21/003C22F1/02C22F1/047
Inventor 杨长江
Owner GUANGZHOU YUZHI TECH CO LTD
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