Multi-extrusion device for preparing layered isomeric magnesium alloy and method for preparing layered isomeric magnesium alloy by utilizing device

Abstract

The invention belongs to the field of material preparation, and particularly relates to a multi-extrusion device for preparing a layered isomeric magnesium alloy and a method for preparing the layeredisomeric magnesium alloy by utilizing the device A plurality of as-cast magnesium alloy ingot blanks subjected to homogenization treatment are cut into square shapes and subjected to preheating treatment, then the square-shaped as-cast magnesium alloy ingot blanks are put into a mold, the blanks are pressed into a cavity under the acting force applied by a punch, and the punch is extruded to continuously move downwards to push the alloy blanks to continuously enter the cavity. After the cavity is completely filled with a blank, an extrusion insert is taken out, an insert with a larger extrusion ratio is replaced, and a limiting block at the outlet part of the blank is adjusted upwards, so that the magnesium alloy which is forced to be extruded obtains enough space, and the extrusion experiment is repeated. In addition, the insert is replaced with the insert with the larger extrusion ratio, the position of the limiting block is adjusted upwards again, and then the extrusion experimentis repeated again. Through repeating the processes, the layered isomeric magnesium alloy with excellent comprehensive performance, high strength and high toughness is finally obtained.

Description

technical field [0001] The invention belongs to the field of material preparation, and in particular relates to a multiple extrusion device and method for preparing layered heterogeneous magnesium alloys. Background technique [0002] Magnesium is the lightest metal structure material. It has the advantages of high specific strength and specific stiffness, strong electromagnetic shielding ability, and good cutting performance. It is the material of choice for weight reduction, energy saving and environmental protection. The further development and wide application of magnesium alloys will greatly promote the development of vehicles and aerospace, but magnesium has a hexagonal close-packed structure, and its rare slip system leads to poor plastic deformation at room temperature, and magnesium The defect of low strength also limits its large-scale application in production. Precipitation strengthening can effectively improve the strength of magnesium alloys, but it also leads...

AI Technical Summary

Problems solved by technology

The further development and wide application of magnesium alloys will greatly promote the development of vehicles and aerospace, but magnesium has a close-packed hexagonal structure, and its rare slip system leads to poor plastic deformation at room temperature, and magnesium The defect of low strength also limits its large-scale application in production

Precipitation strengthening can effectively improve the strength of magnesium alloys, but it will also lead to a significant decrease in the toughness of the material

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