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High plasticity magnesium alloy and preparation method thereof

A magnesium alloy, high plasticity technology, applied in the field of alloy materials, can solve problems such as poor plasticity and forming ability, limit the scope of use, etc., and achieve the effect of refining the grain size

Inactive Publication Date: 2018-09-11
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, magnesium alloys often exhibit poor plasticity and formability at room temperature, which severely limits their application range.

Method used

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  • High plasticity magnesium alloy and preparation method thereof
  • High plasticity magnesium alloy and preparation method thereof
  • High plasticity magnesium alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A high plasticity magnesium alloy, by mass percentage, the magnesium alloy is composed of the following components: Sn 0.72%, Ca 0.5%, Zn 0.54%, unavoidable impurities 0.02%, wherein Fe=0.001%, Cu =0.001%, Si=0.003%, and the balance is magnesium.

[0043] The preparation method of the high plasticity magnesium alloy is as follows:

[0044] (1) Melting: in CO 2 and SF 6 Under the mixed gas formed according to the volume ratio of 100:1, the pure magnesium ingot is heated to 700°C, and then pure tin ingot, pure zinc ingot and magnesium-calcium intermediate alloy are added, fully stirred and smelted to obtain a magnesium alloy melt, in which the magnesium-calcium intermediate The mass percentage of calcium in the alloy is 20%;

[0045] (2) Casting: heat the magnesium alloy melt obtained in step (1) at 730° C. for 15 minutes, remove impurities, then cast it into shape, and obtain an ingot after air cooling;

[0046] (3) Homogenization treatment, air cooling and peeling: ...

Embodiment 2

[0055] A high plasticity magnesium alloy, by mass percentage, the magnesium alloy is composed of the following components: Sn 2.0%, Ca 1.0%, Zn 0.7%, unavoidable impurities 0.03%, wherein Fe=0.002%, Cu = 0.001%, Si = 0.004%, and the balance is magnesium.

[0056] The preparation method of the high plasticity magnesium alloy is as follows:

[0057] (1) Melting: in CO 2 and SF 6 Under the mixed gas formed according to the volume ratio of 100:1, the pure magnesium ingot is heated to 690°C, then pure tin ingot, pure zinc ingot and magnesium-calcium intermediate alloy are added, fully stirred and smelted to obtain a magnesium alloy melt, in which the magnesium-calcium intermediate The mass percentage of calcium in the alloy is 25%;

[0058] (2) Casting: the magnesium alloy melt obtained in the step (1) is kept at 715° C. for 25 minutes to remove impurities, then casted and air-cooled to obtain an ingot;

[0059] (3) Homogenization treatment, air cooling and peeling: heat the in...

Embodiment 3

[0067] A high plasticity magnesium alloy, by mass percentage, the magnesium alloy is composed of the following components: Sn 0.5%, Ca 0.65%, Zn 0.8%, unavoidable impurities 0.02%, wherein Fe=0.001%, Cu = 0.001%, Si = 0.005%, and the balance is magnesium.

[0068] The preparation method of the high plasticity magnesium alloy is as follows:

[0069] (1) Melting: in CO 2 and SF 6 Under the mixed gas formed according to the volume ratio of 100:1, the pure magnesium ingot is heated to 705°C, and then pure tin ingot, pure zinc ingot and magnesium-calcium intermediate alloy are added, fully stirred and smelted to obtain a magnesium alloy melt, in which the magnesium-calcium intermediate The mass percentage of calcium in the alloy is 25%;

[0070] (2) Casting: heat the magnesium alloy melt obtained in step (1) at 720° C. for 20 minutes, then remove impurities, then cast it into shape, and obtain an ingot after air cooling;

[0071] (3) Homogenization treatment, air cooling and pe...

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Abstract

The invention relates to a high plasticity magnesium alloy and a preparation method thereof, and belongs to the technical field of alloy materials. The magnesium alloy is composed of following components in percentage by weight: 0.5 to 2.0% of Sn, 0.5 to 1.0% of Ca, 0.5 to 0.8% of Zn, not more than 0.003% of inevitable impurities, and the balance being magnesium. By limiting the contents of Sn, Zn, and Ca of the magnesium alloy, high plasticity of the magnesium alloy can be guaranteed. At the same time, the contents of impurities in the alloy, in particular, Cu, Fe, and Si, are further limited; the influence of impurities on the plasticity of the alloy is eliminated, and the cost for reducing the impurity content is reduced. Moreover, technological parameters such as smelting temperature,holding temperature, and the like, are strictly controlled during the preparation process, the tissue of casted magnesium alloy is uniform, the macroscopic / microscopic defects are few, and the plasticity of the alloy is further improved.

Description

technical field [0001] The invention belongs to the technical field of alloy materials, and in particular relates to a high-plasticity magnesium alloy and a preparation method thereof. Background technique [0002] Magnesium alloy has a series of advantages such as low density, strong shock absorption, excellent electromagnetic shielding effect, and easy recycling. It has broad application prospects in the fields of electronics, electrical appliances, automobiles, transportation, aviation, and aerospace. However, the magnesium alloy belongs to the hexagonal close-packed structure, which has only one slip plane and three slip systems at room temperature, so its plastic deformation mainly depends on the coordinated action of slip and twinning, but the slip in the magnesium crystal is only Occurs in some crystals where the slip surface is inclined to the direction of the pulling force, so the slip process will be greatly restricted, and twinning is difficult to occur in this or...

Claims

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Application Information

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IPC IPC(8): C22C23/00C22C23/04C22C1/03C22F1/06
CPCC22C1/03C22C23/00C22C23/04C22F1/06
Inventor 蒋斌柴炎福潘复生赵俊罗永欢沈亚群宋江凤黄光胜张丁非
Owner CHONGQING UNIV
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