A Magnesium-Tin-Zinc-Al Deformed Magnesium Alloy Suitable for Extrusion

Abstract

The invention relates to a magnesium-stannum-zinc-aluminum wrought magnesium alloy suitable for being extruded. The wrought magnesium alloy comprises the following components in percentage by mass: 3-5% of Sn, 1% of Al, 0.5-2.0% of Zn, less than or equal to 0.10% of inevitable impurities and the balance of Mg. According to the alloy provided by the invention, the Mg-Sn magnesium alloy is subjected to modification treatment by adopting Zn and Al, so that the grains can be refined and the alloy tissue can be improved. Meanwhile, the tensile strength and the ductility of the alloy are improved to facilitate processing and moulding in the later period. The wrought magnesium alloy provided by the invention is simple in preparation method, relatively low in equipment cost and easy to implement.

Description

technical field [0001] The invention relates to a metal material, in particular to a magnesium-tin-zinc-aluminum deformed magnesium alloy suitable for extrusion. Background technique [0002] Magnesium alloy has high specific strength and specific stiffness, excellent dimensional stability and shock absorption, high recycling capacity, etc., making it known as "green engineering metal structure material in the 21st century". In recent years, energy resources have become increasingly tense. Promoting the lightweight of automobiles and reducing the weight of the body can effectively reduce energy consumption and reduce pollution. Magnesium alloys, as lightweight metal structural materials, have broad application prospects in the automobile manufacturing industry. People have gradually realized that Magnesium alloys are used in transportation, home appliances and other fields. [0003] The annual production of magnesium in the world is about 300,000 tons, of which die-casting ...

AI Technical Summary

Problems solved by technology

However, due to the slow diffusion of Sn in Mg, the time to reach the aging peak is relatively long, which is not conducive to industrial production.

In addition, for Mg‐Sn binary alloys, the lamellar Mg 2 The Sn phase precipitates on the basal plane where the habitual surface is the Mg matrix, which cannot effectively hinder the slip of dislocations on the basal plane, so the improvement of the strength is limited; and the Sn content is too high to cause the Mg 2 The Sn phase is coarse, which reduces the mechanical properties. Some studies have shown that when the Sn content is 3-5%, the mechanical properties are better.

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