High plasticity magnesium alloy and preparation method thereof

Abstract

The invention discloses a magnesium alloy with high plasticity, which contains the following components by mass percent: 0.5 percent to 4 percent of Sn, 0.1 percent to 6 percent of Pb, 0.05 percent to 6 percent of Zr, and Mg as the rest. The preparation steps thereof are as follows: materials are proportioned according to the proportion of alloy components, metals proportioned are heated and melted in protective atmosphere of SF6, the mass percent of Zr in Mg-Zr hardener is 30 percent, and the magnesium alloy of high plasticity is obtained after the temperature reaches 700 DEG C to 730 DEG C and is maintained for 5 minutes to 10 minutes. Magnesium can form a compound with both tin and lead, coordinating with deformation and alleviating stress concentration, thus greatly improving the plastic deformation capacity of magnesium alloy, not only effectively enhancing the strength of the magnesium alloy but also increasing the plasticity of the alloy. Under the function of a certain amount of Zr, tin and lead can impose a more obvious effect on the increasing of the plasticity of magnesium. The magnesium alloy of high plasticity only uses general elements of common tin and lead, thereby avoiding the use of a large amount of rare and precious elements, and has simple production and preparation technique, quite low cost and high normal-temperature plasticity.

Description

1. Technical field [0001] The invention belongs to the technical field of magnesium alloys, in particular to a high-plasticity magnesium alloy and a preparation method thereof. 2. Background technology [0002] Magnesium alloys are widely used in the manufacture of industrial products because of their high specific strength and specific stiffness. However, the existing common magnesium alloys have poor plasticity. If such an alloy is used as the matrix of the composite material, the plasticity of the composite material will also be poor. There are currently some studies on high ductility magnesium alloys: [0003] 200610026842.X proposes a self-generated quasicrystal-reinforced high-plastic magnesium alloy, which belongs to the technical field of metal materials. The inventive components and their weight percentages are: 2-10% Zn, 0.5-6% Gd, 0-1.0% Zr, impurity elements Fe<0.005%, Ni<0.002%, and the rest is Mg. The alloy of the invention contains quasicrystalline ph...

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Problems solved by technology

[0005] The above patents are based on the magnesium-zinc master alloy, adding a certain amount of rare earth elements and other elements to improve the plasticity of the magnesium alloy. The degree of improvement is limited by the parent alloy, and no independent high-plasticity magnesium alloy system has been formed.

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