Preparation process and extrusion die for magnesium alloy pipe under multiple strain paths

Abstract

The invention provides a preparation process and an extrusion die for a magnesium alloy pipe under multiple strain paths. The preparation process comprises the following steps of: preparing a rod-shaped magnesium alloy blank and high-temperature graphite powder; performing heat treatment on the magnesium alloy blank, and slowly cooling in air; performing extrusion preheating treatment again; putting the heated magnesium alloy blank into an extruder, heating an extrusion male die and an extrusion female die in the extruder, and putting the magnesium alloy blank into the extruder; extruding and deforming for multiple times because a shearing and extruding channel is corrugated; and polishing and cleaning the extruded magnesium alloy pipe. According to the preparation process and the extrusion die for the magnesium alloy pipe under the multiple strain paths, the technical problems of strong extrusion texture, severe tension-compression asymmetry, low grain refinement degree and the like existing in the conventional magnesium alloy processing method are solved, and the comprehensive mechanical property of magnesium alloy is improved.

Description

technical field [0001] The invention belongs to the technical field of plastic processing of nonferrous metals, and in particular relates to a preparation process of magnesium alloy pipes under multiple strain paths and an extrusion die. Background technique [0002] In recent years, magnesium and magnesium alloys have received extensive attention due to their unique and excellent comprehensive mechanical properties, and are currently the lightest metal structural materials. Because magnesium and magnesium alloys have excellent performance characteristics, such as: low density, light weight, excellent electrical and thermal conductivity, high specific strength and specific stiffness, good electromagnetic shielding performance, and excellent machinability. It is easy to recycle, so magnesium and magnesium alloys have excellent application prospects, and have been widely used in military, aerospace and digital electronic products and other fields. However, due to the defects ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a preparation process and extrusion die for magnesium alloy pipes under multiple strain paths, which solves the problems of strong extrusion texture, serious tension and compression asymmetry and grain refinement in existing magnesium alloy processing methods Improve the comprehensive mechanical properties of magnesium alloys

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