Composite preparation die made from high-performance wrought magnesium alloy

Abstract

The invention discloses a composite preparation die made from high-performance wrought magnesium alloy. The composite preparation die integrates alloy melting, high specific pressure speed-control condensation, reducing extrusion and equal channel angular extrusion and specifically comprises a cavity, an extruding cavity, a reducing extrusion belt and an equal channel angular extrusion cavity which are sequentially connected, the upper end of the cavity is provide with a convex die matched with the cavity, a movable insertion plate is arranged in an extruding cavity area at the lower end, theperiphery is provided with an inner sleeve and a heating sleeve wrapping the inner sleeve, the heating sleeve is uniformly provided with 6-8 heating tubes in the peripheral direction, the periphery isprovided with a circular cooling chamber, thermocouples are arranged in the cavity, the heating sleeve and the circular cooling chamber, the thermocouples, the heating tubes and the circular coolingchamber are jointly controlled by a control system, and real-time acquisition and adjustment of die temperature are achieved. The composite preparation die can achieve accurate control of process parameters in a whole preparation period while die-change-free continuous production including alloy melting, cooling and pressure machining, and finally the high-performance wrought magnesium alloy material is obtained.

Description

technical field [0001] The invention belongs to the technical field of magnesium alloy processing, and in particular relates to a high-performance deformed magnesium alloy mechanical processing die, in particular to a composite preparation die integrating gold melting, cooling and pressure processing. Background technique [0002] The processing and preparation technology of high-performance magnesium alloys has always been a major problem restricting the production capacity and level of the industry. Due to the condensation and plastic deformation characteristics of magnesium alloy itself, its grain size, density, strength and toughness are low, which greatly limits its wide application as a high-performance structural material. Alloying, special processing technology and heat treatment are usually adopted in the industry. It is expected to improve the strength by means of second phase strengthening, fine grain strengthening, deformation strengthening and precipitation stre...

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Problems solved by technology

[0006]The applicant carefully analyzed the existing technology and found that most of the existing high-performance magnesium alloy processing technology is based on the as-cast ingot obtained by natural cooling under normal pressure. The preparation and processing method separates the various stages of material composition design, preparation and processing modification, which can easily cause the problems of coarse grains, low density and toughness of the material, and the performance potential of the material cannot be fully utilized.

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