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Quasi-crystal reinforced multi-element magnesium alloy and preparation method thereof

A magnesium alloy and quasicrystal technology, applied in the field of quasicrystal reinforced magnesium alloy and its preparation, to achieve the effects of high tensile strength, good comprehensive mechanical properties, and improved comprehensive mechanical properties

Inactive Publication Date: 2015-02-25
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, a large number of studies have focused on the ternary magnesium alloys strengthened by Mg-Zn-RE quasicrystals, and occasionally there are quaternary quasicrystalline reinforced magnesium alloys such as Mg-Zn-RE-Mn and Mg-Zn-RE-Zr. Alloys, and about the Mg-Zn-RE quasicrystalline strengthened multi-element magnesium alloys, there are no reports at home and abroad

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Alloy composition (mass percentage): 6.69% Zn, 1.46% Y, 0.14% Ho, 0.12% Er, 0.08% Mn, 0.06% Ti, 0.23% Zr, and the rest is magnesium.

[0017] Put pure Mg in a crucible and heat it, and start to pass CO from 350°C 2 +SF 6 Mix the protective gas, and after the pure magnesium is completely melted, put the pure Zn and Mg-Y, Mg-Ho, Mg-Er, Mg-Mn, Mg-Ti, Mg-Zr master alloys in the pure magnesium melt according to the designed composition ratio. When the alloy melt rises to 760°C, it is stirred for 3 minutes, then refined and left to stand for 10 minutes, and cast into an alloy ingot at 720°C. The alloy ingot was homogenized and annealed at 390°C for 16h, and then hot-extruded at a temperature of 360°C and an extrusion ratio of 81.

[0018] The extruded alloy was aged at 180°C for 16 hours. The tensile strength of the obtained alloy was 395MPa, the yield strength was 353MPa, and the elongation was 24.2%.

[0019] The extruded alloy was aged at 180°C for 20 hours. The tensile...

Embodiment 2

[0021] Alloy composition (mass percentage): 11.42% Zn, 3.13% Y, 0.32% Ho, 0.26% Er, 0.11% Mn, 0.09% Ti, 0.34% Zr, and the rest is magnesium.

[0022] Put pure Mg in a crucible and heat it, and start to pass CO from 350°C 2 +SF 6 Mix the protective gas, and after the pure magnesium is completely melted, put the pure Zn and Mg-Y, Mg-Ho, Mg-Er, Mg-Mn, Mg-Ti, Mg-Zr master alloys in the pure magnesium melt according to the designed composition ratio. When the alloy melt rises to 760°C, it is stirred for 3 minutes, then refined and left to stand for 10 minutes, and cast into an alloy ingot at 720°C. The alloy ingot was homogenized and annealed at 390°C for 16h, and then hot-extruded at a temperature of 360°C and an extrusion ratio of 81.

[0023] The extruded alloy was aged at 175°C for 16 hours. The tensile strength of the obtained alloy was 413MPa, the yield strength was 348MPa, and the elongation was 19.4%.

Embodiment 3

[0025] Alloy composition (mass percentage): 6.82% Zn, 1.38% Y, 0.13% Ho, 0.12% Er, 0.12% Mn, 0.08% Ti, 0.48% Zr, and the rest is magnesium.

[0026] Put pure Mg in a crucible and heat it, and start to pass CO from 350°C 2 +SF 6 Mix the protective gas, and after the pure magnesium is completely melted, put the pure Zn and Mg-Y, Mg-Ho, Mg-Er, Mg-Mn, Mg-Ti, Mg-Zr master alloys in the pure magnesium melt according to the designed composition ratio. When the alloy melt rises to 760°C, it is stirred for 3 minutes, then refined and left to stand for 10 minutes, and cast into an alloy ingot at 720°C. The alloy ingot was homogenized and annealed at 390°C for 16h, and then hot-extruded at a temperature of 360°C and an extrusion ratio of 81.

[0027] The extruded alloy was aged at 180°C for 16 hours. The tensile strength of the obtained alloy was 406MPa, the yield strength was 358MPa, and the elongation was 23.8%.

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Abstract

The invention discloses a quasi-crystal reinforced multi-element magnesium alloy and a preparation method thereof, belonging to the field of industrial magnesium alloys and manufacturing thereof. The quasi-crystal reinforced multi-element magnesium alloy comprises the following components in percentage by mass: 6.0-16% of Zn, 1.4-3.6% of Y, 0.1-0.5% of Ho, 0.1-0.5% of Er, 0.05-1.2% of Mn, 0.02-1.6% of Ti, 0.05-1.8% of Zr, and the balance of Mg. The quasi-crystal reinforced multi-element magnesium alloy disclosed by the invention has relatively good comprehensive mechanical properties namely relatively high tensile strength and relatively high elongation percentage, and particularly has relatively high yield strength.

Description

technical field [0001] The invention relates to the field of high-strength and high-toughness magnesium alloys for industrial use and the field of manufacture thereof, in particular to a quasi-crystal reinforced magnesium alloy and a preparation method thereof. Background technique [0002] As the lightest metal structural material, magnesium alloy has the advantages of high specific strength, good noise reduction and vibration reduction, good electromagnetic shielding, and easy recycling. It is used in transportation vehicles, aerospace, electronic communications, national defense technology and other fields. It has a very broad application prospect. Especially with the increasing requirements for the lightweight, energy saving, environmental protection and ecological environment of transportation equipment, the application of magnesium alloys in the field of transportation equipment has attracted more and more attention. However, magnesium alloys have their own shortcomin...

Claims

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Application Information

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IPC IPC(8): C22C23/04C22F1/06
CPCC22C23/04C22F1/06
Inventor 张英波李彬
Owner SOUTHWEST JIAOTONG UNIV
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