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Corrosion-resistant magnesium-lithium alloy

A magnesium-lithium alloy, corrosion-resistant technology, applied in the field of metal materials, can solve problems such as accelerated alloy corrosion, phase interface corrosion, corrosion, etc., to achieve the effect of refining alloy grains, promoting refinement, and improving oxidation resistance and combustion resistance

Pending Publication Date: 2020-04-17
FOSHAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, since both magnesium and lithium are active metals and are in a two-phase structure, in the use environment, it is very easy to corrode at the phase interface, resulting in a primary battery, so that magnesium and lithium are continuously dissolved at the anode, and there is H at the cathode. 2 precipitation, thereby accelerating the corrosion of the alloy
[0011] The corrosion resistance of magnesium-lithium alloy is very poor, and severe corrosion will also occur in the atmosphere at room temperature
In addition, magnesium-lithium alloys are highly susceptible to stress corrosion cracking in humid atmospheres

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A corrosion-resistant magnesium-lithium alloy, the alloy includes the following components in weight percentage: Li 9.3%, Zr 1.6%, Ce 0.8%, Nd 0.6%, La 0.9%, and the balance is Mg.

[0029] The preparation method of the above-mentioned corrosion-resistant magnesium-lithium alloy comprises the following steps:

[0030] (1) Prepare raw materials according to the weight percentage of each component in the corrosion-resistant magnesium-lithium alloy;

[0031] (2) Vacuum smelting the prepared raw materials to obtain an alloy melt, and then casting it into a mold and cooling with the furnace to obtain a cast magnesium-lithium alloy;

[0032] (3) The as-cast magnesium-lithium alloy obtained in step (2) is sequentially subjected to solid solution treatment, and the specific process is: the as-cast magnesium-lithium alloy is heated to 650K, wherein an inert gas needs to be used for protection during the heating process, and then kept for 6 hours , and then rapidly cooled in an ...

Embodiment 2

[0035] A corrosion-resistant magnesium-lithium alloy, the alloy includes the following components in weight percentage: Li 9.4%, Zr 2.0%, Ce 0.7%, Nd 0.5%, La 1.0%, and the balance is Mg.

[0036] The preparation method of the above-mentioned corrosion-resistant magnesium-lithium alloy comprises the following steps:

[0037] (1) Prepare raw materials according to the weight percentage of each component in the corrosion-resistant magnesium-lithium alloy;

[0038] (2) Vacuum smelting the prepared raw materials to obtain an alloy melt, and then casting it into a mold and cooling with the furnace to obtain a cast magnesium-lithium alloy;

[0039] (3) The as-cast magnesium-lithium alloy obtained in step (2) is sequentially subjected to solid solution treatment, and the specific process is: the as-cast magnesium-lithium alloy is heated to 650K, wherein an inert gas needs to be used for protection during the heating process, and then kept for 6 hours , and then rapidly cooled in an ...

Embodiment 3

[0042] A corrosion-resistant magnesium-lithium alloy, the alloy includes the following components in weight percentage: Li 10.9%, Zr 2.1%, Ce 0.8%, Nd 0.5%, La 1.1%, and the balance is Mg.

[0043] The preparation method of the above-mentioned corrosion-resistant magnesium-lithium alloy comprises the following steps:

[0044] (1) Prepare raw materials according to the weight percentage of each component in the corrosion-resistant magnesium-lithium alloy;

[0045] (2) Vacuum smelting the prepared raw materials to obtain an alloy melt, and then casting it into a mold and cooling with the furnace to obtain a cast magnesium-lithium alloy;

[0046] (3) The as-cast magnesium-lithium alloy obtained in step (2) is sequentially subjected to solid solution treatment, and the specific process is: the as-cast magnesium-lithium alloy is heated to 650K, wherein an inert gas needs to be used for protection during the heating process, and then kept for 6 hours , and then rapidly cooled in an...

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PUM

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Abstract

The invention discloses a corrosion-resistant magnesium-lithium alloy. The alloy comprises the following components of, in percentage by weight, 8.1%-11.9% of Li, 1.3%-2.4% of Zr, 0.1%-0.9% of Ce, 0.3%-0.9% of Nd, 0.9%-1.5% of La, and the balance Mg. According to the method, three rare earth elements of Ce, Nd and La are added in the magnesium-lithium alloy, and the corrosion resistance of the magnesium-lithium alloy is improved while the mechanical properties of the magnesium-lithium alloy are guaranteed.

Description

technical field [0001] The invention belongs to the technical field of metal materials, in particular to a corrosion-resistant magnesium-lithium alloy. Background technique [0002] With magnesium and lithium as the main alloying elements, the alloy obtained by adding other alloying elements on this basis is called magnesium-lithium alloy, and its density is generally 1.35-1.65g / cm 3 , this density is about 1 / 5 of steel and 1 / 2 of aluminum alloy, which is worthy of the name, ultra-light alloy. When the lithium content is relatively high, the density of magnesium-lithium alloy can even be lower than 1.0g / cm 3 , known as a metal that can float on water. [0003] Magnesium-lithium alloy material is made by adding metallic lithium to magnesium, so that it has excellent mechanical properties of low density, high specific stiffness, and high specific strength. With the change of lithium content, the structure of magnesium-lithium alloy will also change significantly. Change, whe...

Claims

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Application Information

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IPC IPC(8): C22C23/00C22F1/06C22F1/02
CPCC22C23/00C22F1/02C22F1/06
Inventor 常萌蕾陈东初魏红阳陆稼聪田耕宇李华军
Owner FOSHAN UNIVERSITY
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