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High-strength and high-plasticity Mg-Al-Ce-(Nd) wrought magnesium alloy and preparation method thereof

A mg-al-ce-, wrought magnesium alloy technology, applied in the field of high-strength and high-plasticity Mg-Al-Ce-wrought magnesium alloy and its preparation, can solve the problems of limiting application, increasing alloy cost and density, and achieving a promotional position Effects of mis-nucleation, increase in work hardening rate, and improvement in alloy formability

Active Publication Date: 2021-12-07
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, an excessively high content of heavy rare earth elements greatly increases the cost and density of the alloy, which severely limits its application in the industrial field.

Method used

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  • High-strength and high-plasticity Mg-Al-Ce-(Nd) wrought magnesium alloy and preparation method thereof
  • High-strength and high-plasticity Mg-Al-Ce-(Nd) wrought magnesium alloy and preparation method thereof
  • High-strength and high-plasticity Mg-Al-Ce-(Nd) wrought magnesium alloy and preparation method thereof

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preparation example Construction

[0038] The preparation method of the above-mentioned Al, Ce and Nd composite strengthened high-strength and high-plastic deformation magnesium alloy comprises the following steps:

[0039] Step 1, preheating industrial pure magnesium ingots, pure aluminum ingots, pure cerium and Mg-25% Nd master alloy (by mass percentage, Nd 25%, Mg balance) at 100-200° C. for 30-60 minutes;

[0040] Step 2: Melt the preheated industrial pure magnesium ingot in a protective atmosphere at a temperature of 760°C±10°C; put the preheated pure aluminum ingot, pure cerium and Mg-25%Nd master alloy in turn into complete melting Keep it warm in the pure magnesium melt for 10-30 minutes; after the pure aluminum ingot, pure cerium and Mg-25% Nd intermediate alloy are completely melted, mechanically stir for 1-3 minutes; For the degassing effect of the body, stand at this temperature for 5-15 minutes to make the inclusions in the melt float or settle; finally, cool the melt to 710°C ± 10°C, skim off the ...

Embodiment 1

[0048] In this embodiment, the high-strength plastic magnesium alloy reinforced by Al, Ce and Nd contains the following components in mass percentage: Al 1.0wt%, Ce 0.3wt%, Nd0.2wt%, the rest are Mg and unavoidable impurities, Impurity content≤0.04wt%.

[0049] In the present embodiment, the preparation method of the high-strength plasticity magnesium alloy strengthened by Al, Ce and Nd, comprises the following steps:

[0050] 1) Preheat industrial pure magnesium ingots, pure aluminum ingots, pure cerium and Mg-25% Nd master alloy at 150°C for 1 hour;

[0051] 2) Put the preheated industrial pure magnesium ingot in SF 6 / CO 2 Melt in a protective atmosphere at a temperature of 760°C; put the preheated pure aluminum ingot, pure cerium and Mg-25% Nd master alloy into the completely melted pure magnesium melt for 20 minutes; wait for the pure aluminum ingot, pure cerium After the Mg-25% Nd master alloy is completely melted, stir it mechanically for 2 minutes; then pass in argo...

Embodiment 2

[0056] In this embodiment, the high-strength plastic magnesium alloy strengthened by Al, Ce and Nd contains the following components in mass percentage: Al 1.0wt%, Ce 1.0wt%, Nd 1.0wt%, the rest are Mg and unavoidable impurities, Impurity content≤0.04wt%.

[0057] In the present embodiment, the preparation method of the high-strength plasticity magnesium alloy strengthened by Al, Ce and Nd, comprises the following steps:

[0058] 1) Preheat industrial pure magnesium ingots, pure aluminum ingots, pure cerium and Mg-25% Nd master alloy at 150°C for 1 hour;

[0059] 2) Put the preheated industrial pure magnesium ingot in SF 6 / CO 2 Melt in a protective atmosphere at a temperature of 760°C; put the preheated pure aluminum ingot, pure cerium and Mg-25% Nd master alloy into the completely melted pure magnesium melt for 20 minutes; wait for the pure aluminum ingot, pure cerium After the Mg-25% Nd master alloy is completely melted, stir it mechanically for 2 minutes; then pass in a...

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Abstract

The invention belongs to the field of nonferrous metal materials and machining thereof, and particularly relates to a high-strength and high-plasticity Mg-Al-Ce-(Nd) wrought magnesium alloy and a preparation method thereof. The high-strength and high-plasticity wrought magnesium alloy comprises the following components of, in percentage by mass, 0.1wt%-6.0 wt% of Al, 0.1wt%-3.0 wt% of Ce, 0wt%-3.0 wt% of Nd and the balance Mg and inevitable impurities, and the content of the impurities is less than or equal to 0.04 wt%. The high-strength and high-plasticity wrought magnesium alloy is prepared through a series of means such as melting, casting, homogenization treatment and backward extrusion. The wrought magnesium alloy with the submicron grain size is obtained by compositely adding Al, Ce and Nd elements and combining a backward extrusion process. In the extrusion process, high-density Mg17Al12, Al2Ce and Mg12Nd nano precipitated phases are dynamically precipitated and are partially dispersed and distributed on dislocation and grain boundaries (including small-angle grain boundaries), a remarkable precipitation strengthening effect is obtained, and the room-temperature mechanical property of the alloy is further improved.

Description

Technical field: [0001] The invention belongs to the field of non-ferrous metal materials and their processing, in particular to a high-strength and high-plasticity Mg-Al-Ce-(Nd) deformed magnesium alloy and a preparation method thereof. Background technique: [0002] As the lightest metal structure material, the density of magnesium is only 1.74g / cm 3 , which is equivalent to 2 / 3 of aluminum and 1 / 4 of steel. It has the advantages of low density, high specific strength and rigidity, good electromagnetic shielding and shock absorption, and is the third most potential after steel and aluminum alloy. Metal structural materials, known as "green engineering metals in the 21st century", have been widely used in key equipment and major projects in our country. Especially in the fields of transportation and aerospace, the promotion and application of magnesium and its alloys can significantly reduce the weight of parts, improve fuel efficiency and save energy, thus alleviating the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/02C22C23/06C22C1/03C22F1/06
CPCC22C23/06C22C23/02C22C1/03C22F1/06
Inventor 黄秋燕刘洋罗天骄李应举冯小辉杨院生
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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