Electro-plasticizing continuous extrusion molding processing technology of high-strength aluminum alloy

Abstract

The invention relates to a new method for molding processing of a high-strength aluminum alloy, and belongs to the plasticity processing field. The method enables a pulse current to be applied to a deformation zone in the high-strength aluminum alloy extruding process to promote the improvement of the plasticity of the high-strength aluminum alloy and reduce the deformation resistance of the high-strength aluminum alloy to make the difficult-deformation high-strength aluminum alloy deform at normal temperature, so the heat treatment operations comprising device heating, annealing and the like are omitted. The pulse current can be directly applied to dislocation structures to promote the dislocation motion, so the affections of residual stress and processing hardening are reduced under the action of the pulse current, thereby the product surface quality is improved and the annealing operation is omitted. The reduction of the deformation resistance can effectively reduce the load acted on a die and reduce the temperature of the cavity material baffle block, so the service life and the production efficiency of the die are greatly improved, thereby the production cost is reduced. The surface quality and the mechanical performances of products are improved because of the pulse current, so rigorous performance requirements of the high-strength aluminum alloy of aerospace vehicles, high-speed trains and the like because of bad working environments are satisfied.

Description

technical field [0001] The invention relates to the plastic processing of nonferrous metals, especially the continuous extrusion forming processing method of high-strength aluminum alloy electroplasticization. Background technique [0002] At present, high-speed railways, aerospace and other transportation fields have put forward higher and higher requirements for increasing speed and saving energy. High-speed trains, airplanes and other means of transportation increase speed and reduce energy consumption by reducing their own weight. Therefore, light metals such as high-strength aluminum alloys are receiving more and more attention. Compared with traditional components such as carbon steel and stainless steel, one is that its weight can be reduced by 1 / 4 to 1 / 3, which can effectively increase speed and reduce energy consumption; Rust removal and other production processes reduce the cost of component production, use and maintenance, and improve the overall quality of comp...

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Problems solved by technology

[0004] Continuous extrusion forming is also an important method for forming high-strength aluminum alloys. However, due to the low plasticity of high-strength aluminum alloys, the method of hot continuous extrusion must be used. Allows to work continuously at high temperature for a long time

However, cold processing will bring about a large extrusion load and a high temperature of the blocking block, which will cause premature damage to the cavity, reduce the service life of the cavity, and increase the production cost.

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