A kind of preparation method of ultra-high elongation mg-zn-y alloy

An elongation and alloy technology, which is applied in the field of magnesium alloy manufacturing, can solve the problems of difficult cold deformation forming, elongation limiting cold deformation formability, and limiting the large-scale application of Mg-Zn-Y alloy, etc., to achieve good solid solution effect , Increased elongation, and improved plastic formability

Inactive Publication Date: 2017-04-12
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reported Mg-Zn-Y alloys prepared by existing methods generally have high strength, but the elongation at room temperature is generally lower than 20%, which greatly limits the large-scale application of Mg-Zn-Y alloys; Cold deformation forming parts, low elongation limits the formability of cold deformation, and it is difficult to achieve non-damage cold deformation forming

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A preparation method of ultra-high elongation Mg-Zn-Y alloy, the steps are:

[0024] A. Casting: pouring Mg-Zn-Y alloy ingots by Zn 7.6%, Y 1.7%, and the balance being the element mass percentage of Mg;

[0025] B, heat treatment: the Mg-Zn-Y alloy ingot that A step obtains is kept at 480 ℃ for 16h, then carries out water quenching treatment, obtains the Mg-Zn-Y alloy ingot after heat treatment;

[0026] C. Pre-deformation: After the Mg-Zn-Y alloy ingot obtained in step B is kept at 350° C. for 3 hours, the temperature is 350° C. and the extrusion ratio is 2. Pre-deformation treatment;

[0027] D. Hot extrusion: heat the pre-deformed Mg-Zn-Y alloy ingot at step C for 3 hours at 350° C., then perform hot extrusion at 350° C. and an extrusion ratio of 32 to obtain the product.

[0028] The specific steps of pouring Mg-Zn-Y alloy ingots in the A step described in this example are:

[0029] Put pure Mg in a crucible and heat it, when it reaches 350°C, start to pass CO 2 ...

Embodiment 2

[0032] A preparation method of ultra-high elongation Mg-Zn-Y alloy, the steps are:

[0033] A. Casting: pouring Mg-Zn-Y alloy ingots by Zn 6.2%, Y 1.4%, and the balance being the element mass percentage of Mg;

[0034] B, heat treatment: the Mg-Zn-Y alloy ingot that A step obtains is kept at 480 ℃ for 16h, then carries out water quenching treatment, obtains the Mg-Zn-Y alloy ingot after heat treatment;

[0035] C. Pre-deformation: After the Mg-Zn-Y alloy ingot obtained in step B is kept at 350° C. for 3 hours, the temperature is 350° C. and the extrusion ratio is 2. Pre-deformation treatment;

[0036] D. Hot extrusion: heat the pre-deformed Mg-Zn-Y alloy ingot at step C for 3 hours at 350° C., then perform hot extrusion at a temperature of 350° C. and an extrusion ratio of 32.

[0037] The specific steps of pouring Mg-Zn-Y alloy ingots in the A step described in this example are:

[0038]Put pure Mg in a crucible and heat it, when it reaches 350°C, start to pass CO 2 +SF 6...

Embodiment 3

[0041] A preparation method of ultra-high elongation Mg-Zn-Y alloy, the steps are:

[0042] A. Casting: pouring Mg-Zn-Y alloy ingots by Zn 4.7%, Y 1%, and the balance being the element mass percentage of Mg;

[0043] B, heat treatment: the Mg-Zn-Y alloy ingot that A step obtains is kept at 500 ℃ for 8h, then carries out water quenching treatment, obtains the Mg-Zn-Y alloy ingot after heat treatment;

[0044] C. Pre-deformation: After the Mg-Zn-Y alloy ingot obtained in step B is kept at 300° C. for 4 hours, the temperature is 320° C. and the extrusion ratio is 1.2 for pre-deformation treatment;

[0045] D. Hot extrusion: heat the pre-deformed Mg-Zn-Y alloy ingot at step C for 4 hours at 300° C., then perform hot extrusion at a temperature of 330° C. and an extrusion ratio of 20 to obtain the product.

[0046] The specific steps of pouring Mg-Zn-Y alloy ingots in the A step described in this example are:

[0047] Put pure Mg in a crucible and heat it, when it reaches 350°C, s...

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Abstract

The invention discloses a method for preparing an ultra-high elongation Mg-Zn-Y alloy. The steps are: A. Mg-Zn-Y is poured according to Zn3-8%, Y0.7-1.8%, and the balance is the mass percentage of Mg. Alloy ingot; B with Mg-Zn-Y alloy ingot at 480-500 ℃ for 8-24h, water quenching, to obtain Mg-Zn-Y alloy ingot; C with Mg-Zn-Y alloy ingot at 300-400 After holding the temperature at 320-380°C for 2-4h at ℃, the extrusion ratio is 1.2-3.5 for pre-deformation treatment; D: after holding the Mg-Zn-Y alloy ingot at 300-400°C for 2-4h, carry out The temperature is 330-400° C., and the extrusion ratio is 20-60 through hot extrusion treatment. During the preparation process by the method, a nano-eutectic crystal structure is formed, so that the finally obtained Mg-Zn-Y alloy has a room temperature elongation higher than 40%.

Description

technical field [0001] The invention relates to the field of magnesium alloy manufacture, in particular to a preparation method of an ultra-high elongation Mg-Zn-Y alloy. 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. Very broad application prospects. Especially with the increasing requirements for light weight, energy saving, environmental protection, etc., the application of magnesium alloys in these fields 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 magnesium alloys in industrialization. Therefore, in order to further expand the scope of application of magnesium alloys and meet their application in high-tech fields, the comprehensive properties of magnesium alloy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/04C22F1/06
Inventor 张英波李彬陈辉权高峰
Owner SOUTHWEST JIAOTONG UNIV
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