Super-high-plasticity high-strength cast magnesium alloy and preparation method thereof

Abstract

The invention relates to a super-high-plasticity high-strength cast magnesium alloy and a preparation method thereof. The cast magnesium alloy comprises the following chemical components by mass percent: 0.5-8.05% of tin, 1.0-6.0% of aluminum and the balance of magnesium. The preparation method comprises the following steps: under the protection of gases, melting preheated the pure magnesium at apreset low temperature, adding the tin and the aluminum in a certain proportion into the melt, evenly stirring after completely melting, heating to a high preset temperature to refine and remove slag,and finally casting to form ingots, The cast magnesium alloy has the advantages of super-high plasticity and high strength; and the preparation method has the advantages of simple technique, high reliability, easy popularization and application, and the like.

Description

technical field

[0001] The invention relates to the field of metal materials, in particular to an ultra-high plasticity, high-strength casting magnesium alloy and a preparation method thereof. Background technique

[0002] As the lightest metal material for engineering structures, magnesium alloy has many excellent unique properties, such as high specific strength, high specific stiffness, good electrical and thermal conductivity, good damping and shock absorption and electromagnetic shielding performance, good regeneration and reuse, etc. Advantages, it has a good application prospect in the fields of automobile, communication equipment, aviation and so on. Especially in terms of light weight, it has significant advantages that are difficult to replace. However, the crystal structure of magnesium is hexagonal close-packed, with few slip systems and poor plastic deformation ability, which largely limits its application. Cast magnesium alloys can form complex shapes and are...