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Mg-Zn-Cu-Zr alloy

A mg-zn-cu-zr, mg-zr technology, applied in the field of magnesium alloy materials, can solve the problems of low toughness level, and achieve the effect of improving plasticity, good casting performance and high production efficiency

Inactive Publication Date: 2011-05-25
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the strength value of this type of alloy can meet the general industrial requirements, its toughness level is low, especially the alloy element Cu content which is unfavorable to the corrosion resistance of magnesium alloy is relatively high (1.5% to 3%)

Method used

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  • Mg-Zn-Cu-Zr alloy

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Step 1, according to the percentage by weight, Zn is 6%, Cu is 0.5%, Zr is 0.6%, and the balance is Mg, and the alloy composition ratio is carried out. The raw materials are industrial pure magnesium ingots, pure zinc ingots, Mg-Cu master alloys and Mg-Zr master alloy;

[0025] Step two, place pure magnesium ingots in SF 6 / CO 2 Heating under the protection of mixed gas, after the pure magnesium ingot is completely melted, add pure zinc ingot at 680°C, add Mg-Cu master alloy and Mg-Zr master alloy at 720°C, keep warm for 5 minutes, stir, and then heat up to Stand at 760°C for 20 minutes, then cool down to 700°C and cast a metal mold into an alloy ingot under a protective atmosphere;

[0026] Step 3, the above alloy ingot is subjected to solution treatment at 430°C for 8 hours, and then the alloy after solution treatment is subjected to aging treatment at 180°C for 15 hours, thereby obtaining the high-performance Mg-6Zn-0.5Cu of the present invention -0.6Zr alloy.

Embodiment 2

[0028] Step 1, according to the percentage by weight Zn is 6%, Cu is 1.0%, Zr is 0.6%, and the balance is the alloy composition ratio of Mg, and the raw materials are industrial pure magnesium ingot, pure zinc ingot, Mg-Cu master alloy and Mg-Zr master alloy;

[0029] Step 2, heat the pure magnesium ingot under the protection of argon, after the pure magnesium ingot is completely melted, add pure zinc ingot at 685°C, add Mg-Cu master alloy and Mg-Zr master alloy at 725°C, keep warm Stir after 6 minutes, then raise the temperature to 770°C and let it stand for 25 minutes, then cool down to 700°C and carry out metal mold casting into an alloy ingot under a protective atmosphere;

[0030] Step 3, the above alloy ingot is subjected to solution treatment at 435°C for 10 hours, and then the alloy after solution treatment is subjected to aging treatment at 180°C for 18 hours, thereby obtaining the high-performance Mg-6Zn-1.0Cu of the present invention -0.6Zr alloy.

Embodiment 3

[0032] Step 1, according to the percentage by weight Zn is 5%, Cu is 1.5%, Zr is 0.6%, and the balance is the alloy composition ratio of Mg to carry out batching, and raw material is industrial pure magnesium ingot, pure zinc ingot, Mg-Cu master alloy and Mg-Zr master alloy;

[0033] Step two, place pure magnesium ingots in SF 6 / CO 2 Heating under the protection of mixed gas, after the pure magnesium ingot is completely melted, add pure zinc ingot at 690°C, add Mg-Cu master alloy and Mg-Zr master alloy at 730°C, keep warm for 8 minutes, stir, and then heat up Stand at 770°C for 25 minutes, then cool down to 710°C and cast a metal mold into an alloy ingot under a protective atmosphere;

[0034] Step 3, the above alloy ingot is subjected to solution treatment at 440°C for 20 hours, and then the alloy after solution treatment is subjected to aging treatment at 180°C for 20 hours, thereby obtaining the high-performance Mg-5Zn-1.5Cu of the present invention -0.6Zr alloy.

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Abstract

The invention discloses an Mg-Zn-Cu-Zr alloy. The alloy comprises the following components in percentage by weight: 5 to 7 percent of Zn, 0.5 to 2 percent of Cu, 0.3 to 0.8 percent of Zr and the balance of Mg. The alloy is prepared by adopting relatively cheap alloy elements, a common casting method and subsequent heat treatment; and the operating process is simple, and the production efficiency is high. The alloy has good casting performance and excellent comprehensive mechanical property.

Description

technical field [0001] The invention relates to the technical field of magnesium alloy materials, in particular to a Mg-Zn-Cu-Zr alloy. Background technique [0002] Magnesium alloy is the fastest-growing light alloy in the world today, and is known as "the green engineering material with the most development and application potential in the 21st century". Magnesium alloys have a series of special properties such as low density, high specific strength and specific stiffness, strong damping, vibration and noise reduction capabilities, excellent electromagnetic shielding performance, good machinability and thermoformability, and easy recycling, making them widely used in automobiles, It has important application value and broad application prospects in electrical and electronic, aerospace, national defense, transportation and other fields. [0003] Among the current commercial magnesium alloys, Mg-Zn alloys are favored by researchers at home and abroad because they can produc...

Claims

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Application Information

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IPC IPC(8): C22C23/04
Inventor 朱红梅刘江文伍翠兰罗承萍焦东玲
Owner SOUTH CHINA UNIV OF TECH
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