Authigenic quasicrystal reinforced high plastic deformation magnesium alloy

Abstract

The high molding distortion magnesium alloy with the autogeny allowing the crystal wnganced belongs to the metal technical domain. The invention team and the weight percent: 2-10% Zn, 0.5-6%Gd, 0-1.0%Zr, the impurity element Fe is below 0.005%, the rest is Mg. the invention alloy contains the allowing crystal phase, it is formed into the casting group as the formation of the branch crystal, the allowing crystal phase crushed to distribute along the distorting direction through the extrusion or the rolling hot distorting technology, at the same time, the dispersion distributing twice allowing crystal phase is separated out on the inner group body and the edge of the crystal during the extrusion and the rolling to improve the capability of the alloy. The allowing crystal and the group body has the good interface connecting function, it can harmonize distortion and delay the stress concentrate. So the mold distortional capability of the magnesium alloy can be improved highly. It can be used to produce the magnesium alloy distortional material with the higher distortional capability to resisting the extrusion, the rolling and the pressing. The alloy has the upper model ability and matched with the middling intensity; the resisting intension under the room temperature: 260MPa-320MPa; the extending percent: 20%-26%.

Description

technical field [0001] The invention relates to a magnesium alloy, in particular to a self-generated quasi-crystal reinforced high plastic deformation magnesium alloy. It belongs to the technical field of metal materials. Background technique [0002] Magnesium alloy is the lightest metal structural material in practical application. It has the advantages of high specific strength, high specific modulus, high damping and shock absorption, etc. It has extremely important application value in the fields of automobile, electronic communication, aerospace and other fields. Wrought magnesium alloys have a wide range of application prospects because they can obtain fine structures and eliminate casting defects, and have higher comprehensive mechanical properties than cast alloys. Existing typical wrought magnesium alloys include AZ31, AZ61, and ZK60 grades. They have certain tensile strength at room temperature, but their plastic deformation ability is not high. In addition to th...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of low plasticity and insufficient forming ability of the existing deformed magnesium alloys, and provide a high-plastic deformation magnesium alloy reinforced by autogenous quasicrystals, so that it can form fine and dispersed particles in the grain boundaries of the alloy and inside the matrix. The quasicrystal strengthening phase particles make full use of the characteristics of quasicrystals, overcome the disadvantages of cracks easily formed at the interface between the second phase and the matrix caused by the conventional crystal phase strengthening of magnesium alloys, and lead to low plasticity, and greatly improve the strength of magnesium alloys at room temperature. Plasticity, while ensuring that the magnesium alloy has medium-strength mechanical properties, tensile strength at room temperature: 260MPa-320MPa; tensile elongation: 20%-26%