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Super-high-plasticity high-strength cast magnesium alloy and preparation method thereof

A technology for casting magnesium alloys with high strength, applied in the field of metal materials, can solve the problems of complex process, difficult to meet requirements, few types of magnesium alloys, etc., and achieve the effect of simple process

Active Publication Date: 2010-02-10
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the process is relatively complex
In addition, there are few types of magnesium alloys at present, and it is difficult to meet the requirements of different working conditions. It is urgent to develop an ultra-high plasticity, high-strength cast magnesium alloy.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) taking raw material by mass percentage is: pure tin 0.5%, pure aluminum 1%, all the other are magnesium;

[0020] (2) In a gas shielded melting furnace, first preheat the pure magnesium ingot with the above content to 350-400°C in a crucible, and then heat up to 650-680°C for melting;

[0021] (3) Add the above content of pure tin and pure aluminum preheated at 200°C to the magnesium melt, continue to stand at 650-680°C for 5-10 minutes, and then stir for 2-20 minutes to make the ingredients uniform ;

[0022] (4) Add No. 2 flux, raise the temperature to 730-820°C, let it stand for 5-10 minutes, blow argon for refining, remove slag, and directly cast into ingot to obtain Mg-0.5Sn-1Al alloy.

Embodiment 2

[0024] (1) taking raw material by mass percentage is: pure tin 2%, pure aluminum 2%, all the other are magnesium;

[0025] (2) In a gas shielded melting furnace, first preheat the pure magnesium ingot with the above content to 350-400°C in a crucible, and then heat up to 650-680°C for melting;

[0026] (3) Add the above content of pure tin and pure aluminum preheated at 200°C to the magnesium melt, continue to stand at 650-680°C for 5-10 minutes, and then stir for 2-20 minutes to make the ingredients uniform ;

[0027] (4) Add No. 2 flux, raise the temperature to 730-820°C, let it stand for 5-10 minutes, blow argon to refine, remove slag, and directly cast into ingot to make Mg-2Sn-2Al alloy.

Embodiment 3

[0029] (1) taking raw material by mass percentage is: pure tin 3%, pure aluminum 3%, all the other are magnesium;

[0030] (2) In a gas shielded melting furnace, first preheat the pure magnesium ingot with the above content to 350-400°C in a crucible, and then heat up to 650-680°C for melting;

[0031] (3) Add the above content of pure tin and pure aluminum preheated at 200°C to the magnesium melt, continue to stand at 650-680°C for 5-10 minutes, and then stir for 2-20 minutes to make the ingredients uniform ;

[0032] (4) Add No. 2 flux, raise the temperature to 730-820°C, keep it for 5-10 minutes, blow argon to refine, remove slag, and directly cast into ingots to obtain Mg-3Sn-3Al alloy. The casting performance of the alloy is as follows: the elongation rate is greater than 30-35%, the tensile strength is greater than 230-250MPa, and the deformation rate is greater than 85%.

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Abstract

The invention relates to a super-high-plasticity high-strength cast magnesium alloy and a preparation method thereof. The cast magnesium alloy comprises the following chemical components by mass percent: 0.5-8.05% of tin, 1.0-6.0% of aluminum and the balance of magnesium. The preparation method comprises the following steps: under the protection of gases, melting preheated the pure magnesium at apreset low temperature, adding the tin and the aluminum in a certain proportion into the melt, evenly stirring after completely melting, heating to a high preset temperature to refine and remove slag,and finally casting to form ingots, The cast magnesium alloy has the advantages of super-high plasticity and high strength; and the preparation method has the advantages of simple technique, high reliability, easy popularization and application, and the like.

Description

technical field [0001] The invention relates to the field of metal materials, in particular to an ultra-high plasticity, high-strength casting magnesium alloy and a preparation method thereof. Background technique [0002] As the lightest metal material for engineering structures, magnesium alloy has many excellent unique properties, such as high specific strength, high specific stiffness, good electrical and thermal conductivity, good damping and shock absorption and electromagnetic shielding performance, good regeneration and reuse, etc. Advantages, it has a good application prospect in the fields of automobile, communication equipment, aviation and so on. Especially in terms of light weight, it has significant advantages that are difficult to replace. However, the crystal structure of magnesium is hexagonal close-packed, with few slip systems and poor plastic deformation ability, which largely limits its application. Cast magnesium alloys can form complex shapes and are...

Claims

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Application Information

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IPC IPC(8): C22C23/00C22C23/02C22C1/02C22C1/06
Inventor 王慧远姜启川刘章王东明何婷
Owner JILIN UNIV
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