Rotary reciprocating extrusion device and processing method for ultrafine-grained magnesium alloy

Abstract

The invention relates to a rotary reciprocating extrusion device for a superfine crystal magnesium alloy and a processing method, and belongs to the technical field of non-ferrous metal plastic processing. The device and the method can solve the problem that an existing magnesium alloy mechanical property improvement method is not beneficial to batch production. According to the device and the method, a rotating wheel is additionally arranged in the deformation process to enable a cavity of an extrusion mold to rotate to change the extrusion path so as to realize the introduction of the torsion deformation in the extrusion process, then the magnesium alloy undergoes deformation processing through multi-pass reciprocating rotary extrusion, continuous deformation of a magnesium alloy blank is realized, and the magnesium alloy material with fine grains and uniform structure is prepared. According to the rotary reciprocating extrusion device and the processing method, the extrusion mold issimple in structure and easy to process, and is suitable for preparation of superfine crystal products such as the magnesium-based material and other light metal.

Description

technical field [0001] The invention belongs to the technical field of plastic processing of nonferrous metals, and in particular relates to a rotary reciprocating extrusion device and a processing method for ultrafine-grained magnesium alloys. Background technique [0002] As one of the three pillar industries in the 21st century, materials play an important role in various fields of national construction. In recent years, with the development of medical, transportation, electric power, aviation and other fields, people have put forward a higher level Lightweight, high-strength, high-plasticity materials have become the objects of urgent demand. As a light-weight metal structure material, magnesium and its alloys have the advantages of high specific strength and specific stiffness, good cutting processing ability, etc. It is widely used in many industrial fields. However, due to its special crystal structure (hexagonal close-packed crystal structure), magnesium alloys only ...

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Problems solved by technology

[0004] The present invention aims at the problem that existing methods for improving the mechanical properties of magnesium alloys are not conducive to mass production, and provides a rotating and reciprocating extrusion device and processing method for ultra-fine-grained magnesium alloys. The extrusion die is driven by adding a rotating wheel during the deformation process. The rotation of the cavity changes the extrusion path, thereby realizing the introduction of torsional deformation in the extrusion process. Further, the multi-pass reciprocating rotary extrusion deforms the magnesium alloy, realizes the continuous deformation of the magnesium alloy billet, and produces fine grains. Uniform magnesium alloy material

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