High-strength aluminum alloy online quenching system and online quenching technology

Abstract

The invention discloses a high-strength aluminum alloy online quenching system and an online quenching technology of the high-strength aluminum alloy online quenching system. The high-strength aluminum alloy online quenching system comprises an extruding machine, a heat preservation furnace, a quenching device and a dragging machine. The online quenching technology includes the steps of preheating aluminum alloy cast rods, carrying out hot extrusion while dragging is carried out, carrying out heat preservation or heating for heat preservation, and carrying out quenching treatment. After the high-strength aluminum alloy online quenching system and the online quenching technology of the high-strength aluminum alloy online quenching system are adopted, the time of the whole transferring process that aluminum alloy profile leaves a profile outlet of the extruding machine to reach the quenching device for rapid cooling quenching treatment is quite short, immediate online quenching and continuous production after the process that the aluminum alloy profile is extruded to from product parts is completed are achieved, the production cycle is greatly shortened, and the coincidence of the product quality is guaranteed; in the production process, heat losses are few, energy consumption is low, energy is saved, the environment is improved, energy is saved by more than 80% compared with the vertical air furnace quenching technology, and the economic benefits are substantial.

Description

technical field [0001] The invention relates to the technical field of heat treatment of high-strength aluminum alloys, in particular to a system for on-line quenching of high-strength aluminum alloys and an on-line quenching process thereof. Background technique [0002] In the series of high-strength aluminum alloys, 2XXX series aluminum alloys are called duralumin, and 7XXX series aluminum alloys are called super duralumin. Due to the high hardness and high deformation resistance of these two series of aluminum alloys, when the aluminum alloy cast rods are hot-extruded into aluminum alloy profiles, the extrusion speed is very slow, generally between 0.8-3.5 m / min. Since such a slow speed cannot guarantee the temperature consistency of the entire extruded aluminum alloy profile, online quenching cannot be realized. At present, most of the vertical air furnaces are used to quench the aluminum alloy profiles. The process is: preheating the aluminum alloy casting rods → extr...

AI Technical Summary

Problems solved by technology

[0004] (1) The temperature of the aluminum alloy profile extruded by the extrusion machine is very high (above 440°C), but this part of the heat is not fully utilized, but is naturally lost to the surrounding environment, and the aluminum alloy profile is cooled to Normal temperature, and before the subsequent quenching step, it is necessary to put the aluminum alloy profile at normal temperature into a vertical air furnace for reheating, heating, and heat preservation to reach the required quenching temperature, so this quenching process consumes a lot of energy and the surrounding environment The temperature is high and the operating environment is harsh; the investment of a vertical air furnace is expensive, and the investment of a vertical air furnace is usually between 1 million yuan and 10 million yuan (according to the height of the vertical quenching furnace); in addition, it is necessary to build a Deep water well for quenching

Therefore, the whole set of equipment investment is large

[0005] (2) This quenching process is intermittent production, aluminum alloy profiles cannot be continuously quenched online, and the production cycle is long, generally takes 2-3 days

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