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High-strength magnesium-neodymium-zinc-zirconium-lithium alloy and preparation method thereof

A high-strength, lithium alloy technology, applied in the field of metal materials, can solve problems such as the adverse effects of aging time equipment and production efficiency, and achieve the effects of easy industrial production, simple processing technology and reduced density.

Active Publication Date: 2017-03-15
JIANGSU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Excessive aging time will have adverse effects on energy consumption, equipment and production efficiency, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1: Preparation of high-strength magnesium-neodymium-zinc-zirconium-lithium alloy.

[0025] The high-strength magnesium-neodymium-zinc-zirconium-lithium alloy of this embodiment comprises the following components in weight percent: 97.09wt% of Mg, 2wt% of Nd, 0.2wt% of Zn, 0.2wt% of Zr, 0.5 The Li of wt%, the impurity element Si, Fe, Cu and Ni that total amount is 0.01wt% (wt% refers to the percentage that the weight of each component accounts for the total weight of target alloy, and this total weight is Mg, Li, Al and each The sum of the weights of the master alloys).

[0026] The preparation method of the high-strength magnesium-neodymium-zinc-zirconium-lithium alloy is as follows:

[0027] Melting process: the whole melting process is in SF 6 / CO 2 Under the condition of mixed gas protection. Take by weighing pure Mg, Mg-Nd intermediate alloy (Mg-25wt%Nd alloy, also known as Mg-Nd25 alloy or Mg-25Nd alloy, namely the weight of Nd accounts for 25% of the t...

Embodiment 2

[0030] Example 2: Preparation of high-strength magnesium-neodymium-zinc-zirconium-lithium alloy.

[0031] The high-strength magnesium-neodymium-zinc-zirconium-lithium alloy of this embodiment comprises the following components in weight percent: 94.885wt% of Mg, 3wt% of Nd, 0.6wt% of Zn, 0.5wt% of Zr, 1wt% % Li, a total amount of 0.015wt% impurity elements Si, Fe, Cu and Ni (wt% refers to the percentage of the weight of each component in the total weight of the target alloy, which is Mg, Li, Al and various The sum of the weights of master alloys).

[0032] The preparation method of the high-strength magnesium-neodymium-zinc-zirconium-lithium alloy is as follows:

[0033] Melting process: the whole melting process is in SF 6 / CO 2Under the condition of mixed gas protection. Take by weighing pure Mg, Mg-Nd intermediate alloy (Mg-25wt%Nd alloy, also known as Mg-Nd25 alloy or Mg-25Nd alloy, namely the weight of Nd accounts for 25% of the total weight of Mg-25wt%Nd alloy accord...

Embodiment 3

[0036] Example 3: Preparation of high-strength magnesium-neodymium-zinc-zirconium-lithium alloy.

[0037] The high-strength magnesium-neodymium-zinc-zirconium-lithium alloy of this embodiment comprises the following components in weight percent: 92.682wt% of Mg, 4wt% of Nd, 1wt% of Zn, 0.8wt% of Zr, 1.5wt% % Li, a total amount of 0.018wt% impurity elements Si, Fe, Cu and Ni (wt% refers to the percentage of the weight of each component in the total weight of the target alloy, the total weight is Mg, Li, Al and various The sum of the weights of master alloys).

[0038] The preparation method of the high-strength magnesium-neodymium-zinc-zirconium-lithium alloy is as follows:

[0039] Melting process: the whole melting process is in SF 6 / CO 2 Under the condition of mixed gas protection. Take by weighing pure Mg, Mg-Nd intermediate alloy (Mg-25wt%Nd alloy, also known as Mg-Nd25 alloy or Mg-25Nd alloy, namely the weight of Nd accounts for 25% of the total weight of Mg-25wt%Nd ...

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Abstract

The invention belongs to the technical field of metal material, and relates to a high-strength magnesium-neodymium-zinc-zirconium-lithium alloy and a preparation method thereof. The alloy comprises, by weight, 2 to 4 wt% of Nd, 0.2 to 1 wt% of Zn, 0.2 to 0.8 wt% of Zr, 0.5 to 1.5 wt% of Li, and the balance of Mg and the impurity elements Si, Fe, Cu and Ni, and the total amount of the impurity elements is less than 0.02 wt%. The alloy is prepared by the following steps of 1) drying material; 2) feeding; 3) casting; 4) heat treatment. By adding a certain amount of lithium to the magnesium-neodymium-zinc-zirconium alloy, the precipitation of the strengthening phase during the aging process is promoted, the time required for the aging treatment is shortened or the aging treatment temperature is reduced, the performance of the high-strength magnesium zinc-zirconium-lithium alloy is improved, and the density of the alloy is reduced.

Description

technical field [0001] The invention belongs to the technical field of metal materials, and relates to a magnesium alloy and a preparation method thereof, in particular to a high-strength magnesium-neodymium-zinc-zirconium-lithium alloy and a preparation method thereof. Background technique [0002] Magnesium (Mg) alloy has the advantages of low density, wide range of sources, high specific strength and specific stiffness, and is known as "the green engineering material of the 21st century". It has high requirements for lightweight in aerospace, automobile, rail transit, and electronics industries The field has broad application prospects. At present, a major problem limiting the application of magnesium alloys is that the strength is low, which is difficult to meet the requirements of engineering applications. Therefore, it is of great value to develop new high-strength magnesium alloys. [0003] Rare earth elements are commonly used alloying elements in magnesium alloys....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/06C22C1/03C22F1/06
CPCC22C1/03C22C23/06C22F1/06
Inventor 张扬封爱成杨梅李小平卢雅琳
Owner JIANGSU UNIV OF TECH
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