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A kind of high plasticity casting magnesium alloy and preparation method thereof

A casting magnesium alloy, high plasticity technology, applied in the high plasticity casting magnesium alloy of Er, Nd and Zr elements and its preparation, adding Zn, high plasticity casting magnesium alloy and its preparation field, can solve the low elongation of the alloy, Poor plasticity, unfavorable wide application and other problems, to achieve the effect of improving mechanical properties, enhancing plasticity, and improving plasticity

Active Publication Date: 2020-09-15
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, although the existing cast magnesium alloys have excellent strength, the elongation of the alloy is low, and the poor plasticity is not conducive to the wide application of this series of alloys. With the increasing global demand for cast magnesium alloys, the development of Cast magnesium alloys with high plasticity and high strength will become the focus of magnesium alloy research

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] This embodiment relates to a high plasticity casting magnesium alloy, the mass percent of each component of the alloy is: 2wt.% Zn, 3wt.% Er, 0.2wt.% Nd, 0.5wt.% Zr and the balance is Mg.

[0046] The preparation method of the magnesium alloy includes two process steps of smelting and subsequent heat treatment. in,

[0047] The smelting process described in SF 6 and CO 2 Under the protection of mixed gas conditions, the steps are as follows:

[0048] (1) Baking material: Preheat pure magnesium, pure zinc, magnesium-erbium, magnesium-neodymium, magnesium-shovel master alloy for more than 4 hours to reach 200°C;

[0049] (2) Molten magnesium: Melt the dried pure magnesium in a crucible resistance furnace;

[0050] (3) Add Zn, Er: After the pure magnesium is completely melted, add Zn and the intermediate alloy Mg-Er when the melt temperature rises to 730°C;

[0051] (4) Adding Nd and Zr: After Zn and Mg-Er are melted, when the melt temperature rises to 730°C, the mast...

Embodiment 2

[0059] This embodiment relates to a high plasticity casting magnesium alloy, the mass percentage of each component of the alloy is: 3wt.% Zn, 4.5wt.% Er, 1wt.% Nd, 0.8wt.% Zr and the balance is Mg.

[0060] The preparation method of the magnesium alloy includes two process steps of smelting and subsequent heat treatment. in,

[0061] The smelting process described in SF 6 and CO 2 Under the protection of mixed gas conditions, the steps are as follows:

[0062] (1) Baking material: preheat pure magnesium, pure zinc, magnesium-erbium, magnesium-neodymium, magnesium-shovel master alloy for more than 4 hours to reach 220°C;

[0063] (2) Molten magnesium: Melt the dried pure magnesium in a crucible resistance furnace;

[0064] (3) Add Zn, Er: After the pure magnesium is completely melted, add Zn and the intermediate alloy Mg-Er when the melt temperature rises to 740°C;

[0065] (4) Adding Nd and Zr: After Zn and Mg-Er are melted, when the melt temperature rises to 740°C, add t...

Embodiment 3

[0073] This embodiment relates to a high plasticity casting magnesium alloy, the mass percentage of each component of the alloy is: 3.6wt.% Zn, 5.4wt.% Er, 3wt.% Nd, 1wt.% Zr and the balance is Mg.

[0074] The preparation method of the magnesium alloy includes two process steps of smelting and subsequent heat treatment. in,

[0075] The smelting process described in SF 6 and CO 2 Under the protection of mixed gas conditions, the steps are as follows:

[0076] (1) Baking material: preheat pure magnesium, pure zinc, magnesium-erbium, magnesium-neodymium, magnesium-shovel master alloy for more than 4 hours to reach 240°C;

[0077] (2) Molten magnesium: Melt the dried pure magnesium in a crucible resistance furnace;

[0078] (3) Add Zn, Er: After the pure magnesium is completely melted, add Zn and the intermediate alloy Mg-Er when the melt temperature rises to 740°C;

[0079] (4) Adding Nd and Zr: After Zn and Mg-Er are melted, when the melt temperature rises to 740°C, add t...

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Abstract

The invention provides a high plasticity casting magnesium alloy and a preparation method thereof. The alloy is prepared from the components in percentage by mass: 2-8 wt.% of Zn, 3-7 wt.% of Er, 0.2-4 wt.% of Nd, 0.1-1.5 wt.% of Zr, and the balance of Mg. The preparation method includes the steps of two processes of smelting and heat treatment. By controlling the content of Zn and Er in the magnesium alloy, the microstructure of the prepared magnesium alloy is uniform and the grain size is small, a base plane texture is transformed into a rare earth texture, non-base plane slip opening is promoted, the plasticity of the alloy can be significantly improved, and plasticity improvement is ensured while the strength is not sacrificed; and in addition, addition of Nd can increase the elongation of the alloy and enhance the plasticity of the alloy, and after subsequent two-stage solid solution and two-stage aging, the casting magnesium alloy with the high plasticity is obtained. According to the high plasticity casting magnesium alloy and the preparation method thereof, the plasticity of the magnesium alloy is improved by optimizing the alloy compositions and ratio, and comprehensive mechanical performance of the magnesium alloy is obviously higher than that of currently reported cast magnesium alloys.

Description

technical field [0001] The invention belongs to the technical field of metal materials, and relates to a high plastic casting magnesium alloy and a preparation method thereof, in particular to a high plastic casting magnesium alloy added with Zn, Er, Nd and Zr elements and a preparation method thereof. Background technique [0002] As the lightest engineering metal material at present, magnesium alloy has a series of unique advantages such as high specific strength, high specific stiffness, good damping and vibration reduction, strong electromagnetic shielding and thermal conductivity, easy cutting and easy recycling, etc. It has great development prospects in structural parts industries such as computers, communications, and consumer electronics. At present, commercial magnesium alloys are mainly concentrated in one system and one system, including medium strength casting alloys, high plasticity casting alloys, high plastic deformation alloys and high strength casting alloy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/04C22C23/06C22C1/03C22F1/06
CPCC22C1/03C22C23/04C22C23/06C22F1/06
Inventor 肖然刘文才吴国华张亮周北平张秋丁文江
Owner SHANGHAI JIAOTONG UNIV
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