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Nanometer quasi-eutectic enhanced Mg-Zn-Y alloy preparation method

An alloy and quasicrystal technology, applied in the field of magnesium alloy manufacturing, can solve problems such as less research, and achieve the effect of enhancing plastic workability and significant benefits

Active Publication Date: 2018-03-06
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the quasicrystal phases in quasicrystal-reinforced Mg-Zn-Y alloys are micron-scale, and the research on (α-Mg+I-phase) eutectic-reinforced Mg-Zn-Y alloys with nanoscale interlamellar spacing is relatively limited. few
In particular, there is no research report on (α-Mg+I-phase) eutectic reinforced Mg-Zn-Y alloy with low alloy content and interlayer spacing less than 50nm

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A preparation method of nano-eutectic crystal reinforced Mg-Zn-Y alloy, the steps are as follows:

[0031] A. Prepare the cast Mg-Zn-Y alloy according to the set atomic percentage ratio of each constituent element; the set atomic percentages of each constituent element are: 3% Zn, 0.5% Y , and the rest are Mg;

[0032] B, the as-cast Mg-Zn-Y alloy prepared in step A is annealed at 400 DEG C for 12h, and cooled with the furnace;

[0033] C. After the annealed Mg-Zn-Y alloy obtained in step B is kept at 320° C. for 4 hours, hot extrusion is carried out, the extrusion temperature is 320° C., and the extrusion ratio is 20:1;

[0034] D. Place the hot-extruded Mg-Zn-Y alloy obtained in step C in a heat treatment furnace, heat up to 560° C. with the furnace, keep it warm for 10 minutes, and then quench it with water at 60° C. Quasicrystalline reinforced Mg-Zn-Y alloys.

[0035] The specific operation of preparing the as-cast Mg-Zn-Y alloy in step A described in this exampl...

Embodiment 2

[0039] A preparation method of nano-eutectic crystal reinforced Mg-Zn-Y alloy, the steps are as follows:

[0040] A. Prepare the cast Mg-Zn-Y alloy according to the set atomic percentage ratio of each constituent element; the set atomic percentages of each constituent element are: 1.5% Zn, 0.25% Y , and the rest are Mg;

[0041] B. Anneal the as-cast Mg-Zn-Y alloy prepared in step A at 400° C. for 12 hours, and cool with the furnace.

[0042] C. After the annealed Mg-Zn-Y alloy obtained in step B is kept at 320°C for 4h, hot extrusion is carried out, the extrusion temperature is 320°C, and the extrusion ratio is 20:1;

[0043] D. Place the hot-extruded Mg-Zn-Y alloy obtained in step C in a heat treatment furnace, heat up to 580° C. with the furnace, keep it warm for 10 minutes, and then quench it with water at 60° C. to obtain nano-copolymer Quasicrystalline reinforced Mg-Zn-Y alloys.

[0044] The specific operation of preparing the as-cast Mg-Zn-Y alloy in step A described...

Embodiment 3

[0047] A preparation method of nano-eutectic crystal reinforced Mg-Zn-Y alloy, the steps are as follows:

[0048] A. Prepare the cast Mg-Zn-Y alloy according to the set atomic percentage ratio of each constituent element; the set atomic percentages of each constituent element are: 0.5% Zn, 0.08% Y , and the rest are Mg;

[0049] B, the as-cast Mg-Zn-Y alloy prepared by step A is annealed at 380 ℃ for 20h, and cooled with the furnace;

[0050] C. After the annealed Mg-Zn-Y alloy obtained in step B is kept at 300° C. for 4 hours, hot extrusion is carried out, the extrusion temperature is 300° C., and the extrusion ratio is 9:1;

[0051] D. Place the hot-extruded Mg-Zn-Y alloy obtained in step C in a heat treatment furnace, heat up to 550° C. with the furnace, keep it warm for 20 minutes, and then quench it with water at 30° C. to obtain nano-copolymer Quasicrystalline reinforced Mg-Zn-Y alloys.

[0052] The specific operation of preparing the as-cast Mg-Zn-Y alloy in step A d...

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Abstract

The invention discloses a nanometer quasi-eutectic enhanced Mg-Zn-Y alloy preparation method, which comprises the following steps: A, preparing a cast Mg-Zn-Y alloy according to set atom percentage proportions of each component, i.e., 0.5 to 3 percent of Zn, 0.08 to 0.6 percent of Y and the balance of Mg, the atom percentage ratio of Zn and Y being (5-7):1; B, annealing the cast Mg-Zn-Y alloy for8 to 20h at 380 to 420 DEG C, and performing furnace cooling; C, preserving head of the annealed cast Mg-Zn-Y alloy for 2 to 4h at 300 to 400 DEG C, and performing hot extrusion treatment; D, heatingthe Mg-Zn-Y alloy subjected to hot extrusion processing in step C to 550 to 600 DEG C in a heat treatment furnace along with the furnace, preserving the heat for 5 to 20min, and then performing quenching treatment, so as to obtain a nanometer quasi-eutectic enhanced Mg-Zn-Y alloy. According to the preparation method, an (alpha-Mg+I-phase) quasi-eutectic enhanced Mg-Zn-Y alloy with a lamellar spacing of smaller than 50nm can be obtained.

Description

technical field [0001] The invention relates to a preparation method of a nano-eutectic crystal reinforced Mg-Zn-Y alloy, which belongs to the field of magnesium alloy manufacture. 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 shortcomings, such as low strength and poor toughness, which limit the wide application of ...

Claims

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Application Information

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IPC IPC(8): C22C23/04C22F1/06
CPCC22C23/04C22C2200/06C22F1/002C22F1/06
Inventor 张英波李康宁姚丹丹曾崎
Owner SOUTHWEST JIAOTONG UNIV
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