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Deformation magnesium alloy with high yield ratio and high-ductility

A technology of deforming magnesium alloys and high yield strength ratio, applied in the field of magnesium alloys, can solve the problems of reducing yield strength ratio, damaging material plasticity and toughness, and low plasticity, and achieving the effect of reducing yield strength ratio, reducing material plasticity and improving plasticity

Inactive Publication Date: 2008-08-27
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

AZ31 and MB8 have medium strength and good plasticity, ZK60 is a high-strength magnesium alloy, but relatively low plasticity
In order to improve the strength of magnesium alloys, although several new alloys have been developed, or the original alloys have been modified by microalloying, they often only increase the tensile strength of the material, reduce the yield ratio, and damage the plasticity of the material. toughness

Method used

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  • Deformation magnesium alloy with high yield ratio and high-ductility

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Embodiment 1

[0018] Embodiment 1: A deformed magnesium alloy with high yield ratio and high plasticity, the percentage by weight of each component in the magnesium alloy is zinc 1.5%, zirconium 0.1%, erbium 0.4%, and the rest is magnesium and unavoidable impurities .

Embodiment 2

[0019] Embodiment 2: A deformed magnesium alloy with high yield ratio and high plasticity, the percentage by weight of each component in the magnesium alloy is zinc 1.8%, zirconium 0.6%, erbium 0.7%, and the rest is magnesium and unavoidable impurities .

Embodiment 3

[0020] Embodiment 3: A deformed magnesium alloy with high yield ratio and high plasticity, the percentage by weight of each component in the magnesium alloy is zinc 1.5%, zirconium 0.4%, erbium 0.2%, and the rest is magnesium and unavoidable impurities .

[0021] The wrought magnesium alloy with high yield ratio and high plasticity of the present invention can adopt the following preparation process to produce: (1) prepare alloy according to above-mentioned composition, raw material is industrial pure magnesium ingot, industrial pure zinc, Mg-31%Zr master alloy and Mg-27% Er rare earth master alloy in the resistance crucible furnace to add industrial pure magnesium, heating and melting, and pass into SF 6 and CO 2 Mixed gas protection; (2) After the magnesium ingot is melted, add magnesium-zirconium and magnesium-erbium intermediate alloys, and finally add zinc ingots, and continue to pass the protective gas; (3) After all the alloy elements are dissolved, keep warm at 700°C ...

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Abstract

The invention discloses a wrought magnesium alloy with high yield tensile ratio and high plasticity, wherein the percentage by weight of each component of the alloy comprises zinc 1.0%-2.0%, zirconium 0.1%-0.6%, rare earth erbium 0.1%-0.8%, and others are magnesium and unavoidable impurities. Erbium and impurity element, magnesium and oxygen which is rolled alloy liquid in alloy are combined to form small and dispersed precipitation phase which effectively purifies alloy, promotes dynamic recrystallization in the process of thermal deformation, and blocks recrystallized grain to grow. Zinc plays a solution strength effect in alloy. The wrought magnesium alloy of the invention not only has high yield tensile ratio, but also has excellent plasticity, when the yield tensile is not less than traditional commercial wrought magnesium alloy ZK60 with high intensity, the wrought magnesium alloy of the invention greatly improves the plasticity of magnesium alloy, which fully mines application potential of material.

Description

technical field [0001] The invention relates to a magnesium alloy, in particular to a deformed magnesium alloy with high yield ratio and high plasticity. Background technique [0002] Magnesium alloy has low density, high specific strength and specific stiffness, and is currently the lightest metal structural material in industrial applications. It is used in structural parts in aerospace, automobile, transportation and other fields, which can significantly reduce weight and save fuel consumption. However, the low absolute strength and poor plastic deformation ability of magnesium restrict the large-scale application of magnesium alloys in structural parts. [0003] The yield ratio of metal materials is the ratio of yield strength to tensile strength. For most ductile materials used in engineering structures, when the force is greater than the yield strength, due to large plastic deformation, it can no longer meet the use requirements. Therefore, the yield strength is the b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/04
Inventor 张静潘复生
Owner CHONGQING UNIV
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