A high yield-strength ratio wrought magnesium alloy containing rare earth cerium and yttrium

A deformed magnesium alloy, high yield ratio technology, applied in the field of magnesium alloy, can solve the problems of temperature control range error, uneven processing deformation, difficult to control, etc., to achieve the effects of hindering growth, easy operation and control, and increased elongation Effect

Active Publication Date: 2016-02-03
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Complex processing deformation is often uneven, which causes greater stress in the structure, and during heat treatment, the temperature control range has large errors and is difficult to control

Method used

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  • A high yield-strength ratio wrought magnesium alloy containing rare earth cerium and yttrium
  • A high yield-strength ratio wrought magnesium alloy containing rare earth cerium and yttrium
  • A high yield-strength ratio wrought magnesium alloy containing rare earth cerium and yttrium

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Zn4.98wt.%, Zr0.76wt.%, Ce0.52wt.%, Y0.28wt.%, unavoidable impurities <0.12wt.%, the balance is Mg.

[0029] The preparation method of the above-mentioned high yield ratio deformed Mg-Zn-Zr magnesium alloy containing rare earth cerium and yttrium comprises the following steps:

[0030] a) Alloy smelting and casting:

[0031] Raw materials: industrial pure magnesium ingot, pure zinc ingot, Mg-28.54%Zr master alloy, Mg-30%Ce master alloy and Mg-30%Y master alloy.

[0032] Casting by semi-continuous casting method: SF at a volume ratio of 1:99 6 and CO 2 Under the protection of the mixed gas, put the magnesium ingot into the crucible and heat up to 740°C for slag after melting; then add pure zinc ingot and Mg-28.54%Zr master alloy, before adding Preheat the master alloy at 170°C for 25 minutes, quickly press it below the liquid surface when adding it, stir it for 5 minutes after melting, make it mix evenly, and let it stand for 15 minutes; then add Mg-30%Ce master alloy...

Embodiment 2

[0041] The preparation method of the above-mentioned high yield ratio deformed Mg-Zn-Zr magnesium alloy containing rare earth cerium and yttrium comprises the following steps:

[0042] a) Alloy smelting and casting:

[0043] Raw materials: industrial pure magnesium ingot, pure zinc ingot, Mg-28.54%Zr master alloy, Mg-30%Ce master alloy and Mg-30%Y master alloy.

[0044] Casting by semi-continuous casting method: SF at a volume ratio of 5:95 6 and CO 2Under the protection of the mixed gas, put the magnesium ingot into the crucible and heat up to 750°C for slag after melting; then add pure zinc ingot and Mg-28.54%Zr master alloy, before adding Preheat the master alloy at 140°C for 25 minutes, quickly press it below the liquid surface when adding it, stir it for 5 minutes after melting, make it mix evenly, and let it stand for 10 minutes; then add Mg-30%Ce master alloy and Mg- 30% Y intermediate alloy, stir evenly after melting, after standing at 750°C for 20 minutes, salvage ...

Embodiment 3

[0053] The preparation method of the above-mentioned high yield ratio deformed Mg-Zn-Zr magnesium alloy containing rare earth cerium and yttrium comprises the following steps:

[0054] a) Alloy smelting and casting:

[0055] Raw materials: industrial pure magnesium ingot, pure zinc ingot, Mg-28.54%Zr master alloy, Mg-30%Ce master alloy and Mg-30%Y master alloy.

[0056] Casting by semi-continuous casting method: SF at a volume ratio of 3:97 6 and CO 2 Under the protection of the mixed gas, put the magnesium ingot into the crucible and heat up to 760°C for slag after melting; then add pure zinc ingot and Mg-28.54%Zr master alloy, before adding Preheat the master alloy at 140°C for 25 minutes, quickly press it below the liquid surface when adding it, stir it for 5 minutes after melting, make it mix evenly, and let it stand for 10 minutes; then add Mg-30%Ce master alloy and Mg- 30% Y intermediate alloy, stir evenly after melting, after standing at 750°C for 20 minutes, salvage...

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Abstract

The invention provides a high yield ratio deformed magnesium alloy containing rare earth cerium and yttrium. The composition of the alloy includes Mg, Zn, Zr, Ce, and Y, and the mass percentage of each component is: Zn: 4.90~5.20wt .%; Zr: 0.50~0.80wt.%; Ce: 0.50~0.70wt.%; Y: 0.10~1.50wt.%; unavoidable impurities <0.12wt.%; the balance is Mg. Adding a certain amount of cerium and yttrium to the ZK60 magnesium alloy can effectively refine the grains. The cerium, yttrium and magnesium and zinc in the alloy form a fine and dispersed strengthening phase, which can effectively prevent the growth of recrystallized grains during thermal deformation. Large and strengthened matrix, high yield ratio can be obtained, the yield strength exceeds 300MPa, which is significantly higher than the high-strength wrought magnesium alloy ZK60, while ensuring good plasticity. The material of the invention can increase the reliability of mechanical parts, improve product quality, increase material utilization rate, and fully tap the use potential of magnesium alloy materials.

Description

technical field [0001] The invention relates to a magnesium alloy, in particular to a deformed magnesium alloy with high yield strength ratio containing rare earth cerium and yttrium. Background technique [0002] Magnesium and magnesium alloys are the lightest materials in metal structural materials for engineering applications. They have low density, high specific strength and specific stiffness, good casting performance, good shock absorption, high electromagnetic shielding performance, easy cutting and recyclable and many other advantages. It has extremely important application value and broad application prospects in the fields of electronics, electrical appliances, automobiles, aerospace, aviation and national defense. Among the many advantages, especially the light weight of magnesium alloy is difficult to replace with aluminum alloy and steel. For example, magnesium alloy automobile wheel hub can not only reduce the weight of automobiles, but also save energy and re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/04C22C1/03C22F1/06
Inventor 陈先华刘莉滋潘复生
Owner CHONGQING UNIV
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