Multi-element microalloyed magnesium alloy, preparation method thereof and plate extrusion forming process

Abstract

The invention discloses a multi-element microalloyed magnesium alloy, a manufacturing method of the multi-element microalloyed magnesium alloy and a plate extrusion forming process, and belongs to the technical field of magnesium alloys. Firstly, the novel multi-element microalloyed magnesium alloy is provided; secondly, the new preparation method of the multi-element microalloyed magnesium alloy is provided; and thirdly, the new thermal deformation process is provided. The mechanical property of the magnesium alloy is improved by adding a multi-element microalloy optimized structure and utilizing mechanisms such as solution strengthening, aging strengthening and dispersion strengthening; ultrasonic treatment is adopted, so that the nucleation rate is increased, the structure is refined, and the multi-element microalloy is uniformly dispersed; and then thermal deformation treatment is carried out on the basis, a multi-stage solid solution process is adopted, and then extrusion treatment is carried out, so that the mechanical property of the alloy is improved. According to the invention, the tensile strength of the magnesium alloy is 350-370 MPa, the yield strength of the magnesium alloy is 340-350 MPa, and the yield strength of the magnesium alloy is improved by 210-230 MPa compared with that of a cast magnesium alloy.

Description

technical field [0001] The invention belongs to the technical field of magnesium alloys, and specifically relates to a multi-element microalloyed magnesium alloy, a preparation method thereof, and a plate extrusion forming process. Background technique [0002] Magnesium alloy is an alloy with the smallest density among structural materials. It has the characteristics of high specific strength, high specific stiffness, good shock absorption performance, good anti-electromagnetic shielding performance, and excellent cutting performance. Therefore, it is widely used in automobiles, aerospace, The field of electronic products. Especially in the automotive field, the use of magnesium alloy materials can not only reduce weight, but also save energy consumption. [0003] Pure magnesium has a close-packed hexagonal structure, low symmetry, and few slip systems at room temperature, so it has poor plasticity and poor mechanical properties, and is rarely used directly as a structural...

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Problems solved by technology

[0003] Pure magnesium has a close-packed hexagonal structure, low symmetry, and less slip systems at room temperature, so it has poor plasticity and poor mechanical properties, and is rarely used directly as a structural material

In addition, defects such as shrinkage and shrinkage are prone to occur in the cast Mg-Zn alloy, so its mechanical properties are poor

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