A kind of low-alloy high-performance superplastic magnesium alloy and its preparation method

Abstract

A low-alloy, high-performance, superplastic magnesium alloy and a preparation method therefor. The chemical components of said alloy by mass percent are: zinc 0.5-2.5, silver, 0.05-1.0, calcium 0.05-1.0, and zirconium 0.05-1.0, the remainder being magnesium. The total mass percent of the chemical components other than magnesium is less than 3%. The manufacturing method for said alloy comprises the four steps of gradient temperature smelting, quasi-rapid solidification, rolling processing, and recrystallization treatment.

Description

technical field

[0001] The invention relates to the field of metal materials, in particular to a low-alloy high-performance superplastic 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 electrical and thermal conductivity, high damping and shock absorption, high electrostatic shielding, and good regeneration and reuse. It is favored in the selection of materials in the fields of aviation, aerospace, automobile and communication. Especially in terms of light weight, it has significant advantages that are difficult to replace. However, the commonly used magnesium alloys have poor plastic deformation ability and low tensile strength, which limit their application in many occasions. Superplastic magnesium alloys can have high plastic deformation ability under certain conditions, which can satisfy th...