A kind of aluminum alloy extrusion molding production process

Abstract

The invention discloses an aluminum alloy extrusion forming production technology. The aluminum alloy extrusion forming production technology comprises the steps of (1) pretreating aluminum alloy cast ingots, heating the ingots to 360-380 DEG C, and placing the ingots into an extrusion cylinder of an extruding machine; (2) pulling into a workbench filled with product molds so as to enable the ingots be matched with and clamped with the extrusion cylinder; (3) driving an extrusion device in the extrusion cylinder to advance to the product molds at the extrusion speed of 0.2m / min-0.3m / min, extruding the aluminum alloy cast ingots, and extruding the aluminum alloy cast ingots from mold holes of the product molds out so as to form extrusion elements. Thus, during the production process, the heating temperature and the extrusion speed of the aluminum alloy cast ingots are reduced; the dynamic recovery degree of aluminum alloy can be reduced, and further rough and big crystal particles and deep rough crystal rings are prevented from forming; the using requirement is met as well as the finished product rate is increased; the production cost is reduced.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy extrusion material production, in particular to an aluminum alloy extrusion molding production process. Background technique [0002] When aluminum alloy extruded profiles are used as aircraft engine pistons or ship materials, the aluminum alloy material needs to have high heat resistance, good cold and hot processing performance and good welding performance. The production process of alloy materials puts forward higher requirements. [0003] In the prior art, take the AL-CU-Mg-Fe-Ni alloy extruded material suitable as aircraft engine piston or ship material, such as 2A70 (2D70) alloy extruded material as an example, which has high requirements on the production process , especially the grain size and coarse-grained rings of the alloy structure are more stringent. According to technical requirements, the coarse-grained rings in the lower part of the extruded material or along the entire pe...

AI Technical Summary

Problems solved by technology

However, the internal grains of the AL-CU-Mg-Fe-Ni alloy extruded materials produced in China are generally relatively coarse, and most of them are grades four or five. The finished product rate is very low, and more than half of the feeding batches are scrapped as a whole. Therefore, the production cost of AL-CU-Mg-Fe-Ni alloy extruded materials for aviation is very high, and the production speed is slow. It is difficult to meet the market demand for this material. needs

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