Aluminum foil annealing process

Abstract

The invention provides an aluminum foil annealing process. The aluminum foil annealing process comprises the following steps: (1), straightening and leveling aluminum foil coils on a bending straightening machine; (2), pre-coiling aluminium profiles outside a steel sleeve to form a first aluminum profile layer, coiling the aluminum foil coils outside the first aluminum profile layer to form an aluminum foil layer, and then coating an outer ring of the aluminum foil layer with the aluminium profiles to form a second aluminum profile layer to obtain aluminum foils coiled into coils; and (3), loading the aluminum foils coiled into coils in a box-type furnace for annealing, performing air cooling and completing annealing. According to the aluminum foil annealing process, when wide-width foil products with finished product widths of 1200-1600mm are produced, the heat treatment time can be controlled within 10 hours; the quality of finished product models is high; the quality requirements oncontinuous punching and forming of aluminum foil coils of vehicle-mounted display screens can be met by directly slitting under the condition that secondary straightening is not needed; and the aluminum foil annealing process has a good market prospect under the development requirements of production efficiency improvement, cost reduction and quality improvement.

Description

technical field [0001] The invention relates to the technical field of aluminum and aluminum alloys, in particular to an annealing process of aluminum foil. Background technique [0002] With the improvement of people's living standards, automotive display panels have been used more and more widely, and the size of the display panels has become larger and larger. Aluminum foil products have been widely used on display screens due to their good heat dissipation and thin thickness. , but on the one hand, it is required to have a good version to ensure continuous stamping and forming of coils, which can ensure the display effect of the finished product; on the other hand, it is required to have good strength and ductility to ensure the application range of the product, while the pressure drop It is also an obvious trend in the development of the industry. [0003] In the existing coil annealing process, such as the patent No. CN106048479A, entitled "Annealing Process for Alumi...

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Problems solved by technology

The cooling time from high temperature of 600°C to 200°C is long, and the internal crystal grains will grow obviously, and because the annealing process is placed vertically, the furnace loading capacity is also low, which further affects the efficiency, and the production cost of this process is high; The patent number is CN101338404A, titled "Annealing Process for Aluminum Foil of Air Conditioning Radiator". The invention uses isothermal annealing at 280-290°C, and the annealing time is more than 20 hours. The temperature is low enough to promote the complete recrystallization of the product, and the long time Heating increases costs and reduces efficiency; another example is "Annealing Process for Aluminum Alloy Coils" with patent number CN104087879A, which produces aluminum coils through differential temperature annealing. The annealing heating time is greatly reduced to about 12 hours, but the heating efficiency is still low. It is not high enough, and the internal grains are not small enough, so that the elongation is only about 18%, and the control of the pattern is not involved in the content of the invention

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