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Wrought magnesium alloy containing rare earth cerium and yttrium and having high yield ratio

A technology of deformed magnesium alloy and high yield-strength ratio, applied in the field of magnesium alloy, can solve the problems of uneven processing deformation, difficult regulation, temperature control range error, etc. Effect

Active Publication Date: 2014-07-30
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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  • Wrought magnesium alloy containing rare earth cerium and yttrium and having high yield ratio
  • Wrought magnesium alloy containing rare earth cerium and yttrium and having high yield ratio
  • Wrought magnesium alloy containing rare earth cerium and yttrium and having high yield ratio

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Experimental program
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Effect test

Embodiment 1

[0032] A high yield ratio deformed Mg-Zn-Zr magnesium alloy containing rare earth cerium and yttrium, comprising the following components by weight percentage:

[0033] Zn 4.98 wt.%, Zr 0.76 wt.%, Ce 0.52 wt.%, Y 0.28 wt.%, unavoidable impurities <0.12 wt.%, the balance is Mg.

[0034] 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:

[0035] a) Alloy smelting and casting:

[0036] 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.

[0037] 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, quickl...

Embodiment 2

[0045] A high yield ratio deformed Mg-Zn-Zr magnesium alloy containing rare earth cerium and yttrium, including the following components by weight percentage: Zn 5.06 wt.%, Zr 0.57 wt.%, Ce 0.59 wt.%, Y 0.57 wt .%, unavoidable impurities <0.12 wt.%, the balance is Mg.

[0046] 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:

[0047] a) Alloy smelting and casting:

[0048] 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.

[0049] Casting by semi-continuous casting method: SF at a volume ratio of 5:956 and CO 2 Under the protection of the mixed gas, put the magnesium ingot into the crucible and heat up to 750°C to remove the slag after melting; then add the pure zinc ingot and Mg-28.54%Zr master alloy, before adding the pure zinc ingot and Preheat the master alloy at 1...

Embodiment 3

[0057] A Mg-Zn-Zr high yield ratio deformed magnesium alloy containing rare earth cerium and yttrium, including the following components by weight percentage: Zn 4.97 wt.%, Zr 0.79 wt.%, Ce 0.53 wt.%, Y 1.18 wt .%, unavoidable impurities <0.12 wt.%, the balance is Mg.

[0058] 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:

[0059] a) Alloy smelting and casting:

[0060] 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.

[0061] 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 ℃ for slag after melting; then add pure zinc ingot and Mg-28.54%Zr master alloy, before adding pure zinc ingot and Mg-28.54%Zr Preheat the master alloy at 140°C...

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Abstract

The invention provides a wrought magnesium alloy containing rare earth cerium and yttrium and having high yield ratio. The alloy comprises the following components in percentage by mass: 4.90-5.20wt.% of Zn, 0.50-0.80wt.% of Zr, 0.50-0.70wt.% of Ce, 0.10-1.50wt.% of Y, less than 0.12wt.% of inevitable impurities and the balance of Mg. A certain amount of cerium and yttrium are added into the ZK60 magnesium alloy to effectively refine grains, and cerium and yttrium as well as magnesium and zinc in the alloy can form fine and dispersed strengthening phases to effectively hinder growth of recrystallized grains in the thermal deformation process and strengthen the matrix, so that the high yield ratio can be obtained, and the yield strength exceeds 300MPa which is remarkably higher than that of the magnesium alloy ZK60. Meanwhile, good plasticity is guaranteed. The material provided by the invention can enhance the reliability of mechanical parts, the product quality is improved and the utilization ratio of the material is improved, so that the using potential of the magnesium alloy material is fully explored.

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. [0002] Background technique [0003] 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 ene...

Claims

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Application Information

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