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Low-alloyed high-performance superplastic magnesium alloy and preparation method thereof

A magnesium alloy, high-performance technology, applied in the field of low-alloy high-performance superplastic magnesium alloy and its preparation, to achieve the effects of reducing production cost, coordinating plastic strain, and excellent room temperature performance

Active Publication Date: 2019-04-16
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the superplastic magnesium alloys developed in the past are often medium and high alloys, and very few low alloy superplastic magnesium alloys have been proposed.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) According to the mass percent of elements in the alloy: zinc 1.0, silver 0.2, calcium 0.2, zirconium 0.2, the rest is magnesium, take the required pure magnesium, pure zinc, pure silver, magnesium-25% calcium master alloy, magnesium -30% zirconium master alloy;

[0031] (2) in SF 6 and CO 2 Under the protection of the mixed gas, the pure magnesium ingot with the above content is preheated in the crucible to 200-400°C, and then heated to 660-680°C for melting to obtain a pure magnesium melt;

[0032] (3) adding pure zinc and magnesium-calcium master alloy preheated at 100-150°C to the above-mentioned pure magnesium melt, and keeping the temperature at 660-680°C for 3-5 minutes;

[0033] (4) Continue to heat up to 680-750°C, add pure silver and magnesium-zirconium master alloy preheated at 100-150°C to the above-mentioned magnesium melt, and keep warm for 5-10 minutes;

[0034] (5) Cool down to 660-680°C, stir for 2-10 minutes to make the ingredients uniform, then ...

Embodiment 2

[0041] (1) According to the mass percent of elements in the alloy: zinc 1.0, silver 0.05, calcium 0.2, zirconium 0.2, and the rest are magnesium, take the required pure magnesium, pure zinc, pure silver, magnesium-25% calcium master alloy, magnesium -30% zirconium master alloy;

[0042] (2) in SF 6 and CO 2 Under the protection of the mixed gas, the pure magnesium ingot with the above content is preheated in the crucible to 200-400°C, and then heated to 660-680°C for melting to obtain a pure magnesium melt;

[0043] (3) adding pure zinc and magnesium-calcium master alloy preheated at 100-150°C to the above-mentioned pure magnesium melt, and keeping the temperature at 660-680°C for 3-5 minutes;

[0044] (4) Continue to heat up to 680-750°C, add pure silver and magnesium-zirconium master alloy preheated at 100-150°C to the above-mentioned magnesium melt, and keep warm for 5-10 minutes;

[0045](5) Cool down to 660-680°C, stir for 2-10 minutes to make the ingredients uniform, ...

Embodiment 3

[0052] (1) According to the mass percent of elements in the alloy: zinc 1.0, silver 0.2, calcium 0.2, zirconium 0.05, and the rest are magnesium, take the required pure magnesium, pure zinc, pure silver, magnesium-25% calcium master alloy, magnesium -30% zirconium master alloy;

[0053] (2) in SF 6 and CO 2 Under the protection of the mixed gas, the pure magnesium ingot with the above content is preheated in the crucible to 200-400°C, and then heated to 660-680°C for melting to obtain a pure magnesium melt;

[0054] (3) adding pure zinc and magnesium-calcium master alloy preheated at 100-150°C to the above-mentioned pure magnesium melt, and keeping the temperature at 660-680°C for 3-5 minutes;

[0055] (4) Continue to heat up to 680-750°C, add pure silver and magnesium-zirconium master alloy preheated at 100-150°C to the above-mentioned magnesium melt, and keep warm for 5-10 minutes;

[0056] (5) Cool down to 660-680°C, stir for 2-10 minutes to make the ingredients uniform,...

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Abstract

The invention provides a low-alloyed high-performance superplastic magnesium alloy and a preparation method thereof. The chemical components of the low-alloyed high-performance superplastic magnesiumalloy comprises, by mass, 0.5-2.5% of zinc, 0.05-1.0% of argentum, 0.05-1.0% of calcium, 0.05-1.0% of zirconium and the balance magnesium. The gross of mass percent of the chemical components of alloyelements except magnesium is less than 3%. The preparation method for the low-alloyed high-performance superplastic magnesium alloy comprises four steps of gradient-temperature smelting, accurate andrapid solidifying, rolling technology and recrystallization treatment. According to the low-alloyed high-performance superplastic magnesium alloy and the preparation method thereof, a traditional superplastic magnesium alloy design principle is broken through; through combination of a multi-element small-amount alloy component design principle, an accurate and rapid solidifying method and the rolling technology, the superplastic magnesium alloy which is characterized by having low-alloyed high performance and being short in process and low in cost and the preparation method thereof are acquired; the tensile strength of larger than 300 MPa can be acquired by the alloy with components optimized; the elongation rate is larger than 15%; room-temperature performance is outstanding; and in addition, the alloy with components optimized has superplasticity, the elongation rate at the temperature of 300 DEG C is 300%, and the elongation rate at the temperature of 250 DEG C is 250%.

Description

technical field [0001] The invention relates to the field of metal materials, in particular to a low-alloy high-performance superplastic 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 electrical and thermal conductivity, high damping and shock absorption, high electrostatic shielding, and good regeneration and reuse. It is favored in the selection of materials in the fields of aviation, aerospace, automobile and communication. Especially in terms of light weight, it has significant advantages that are difficult to replace. However, the commonly used magnesium alloys have poor plastic deformation ability and low tensile strength, which limit their application in many occasions. Superplastic magnesium alloys can have high plastic deformation ability under certain conditions, which can satisfy th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/04C22C23/00C22C1/03B22D27/04C22F1/06
CPCB22D27/045C22C1/03C22C23/00C22C23/04C22F1/06
Inventor 王慧远杜春风王珵查敏马品奎宋家旺杨治政管志平李志刚徐进程秀明宁宏赵隆卿
Owner JILIN UNIV
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