Finished product annealing process for double zero aluminum foils

Abstract

The invention discloses a finished product annealing process for double zero aluminum foils. The finished product annealing process for the double zero aluminum foils comprises the following steps: a, standing on the outside of a furnace; b, pretreating in the furnace; c, heating slowly; d, annealing at the medium temperature; e, annealing at the low temperature; f, cooling in the furnace; and g, cooling in air out of the furnace. The heating rate in the step of heating slowly is 6-12 h / 100 DEG C; the heating time of the step of annealing at the medium temperature is 8-20 hours, insulating time is 10-175 hours, and the temperature is 195-225 DEG C; and in the step of annealing at the low temperature, the annealing time is 15-100 hours, and the annealing temperature is 150-185 DEG C. In the finished product annealing process, the temperature is raised slowly, performance is reduced and oil is removed at the medium temperature, the oil is then removed at the low temperature, so that the quality of the double zero aluminum foils is improved, the mechanical properties of the aluminum foils, the oil removal effect, the adhesion property and the effect of controlling indexes of a hot drum are remarkable, and demands of downstream users are met.

Description

technical field [0001] The invention belongs to the technical field of aluminum foil processing, and mainly relates to a finished annealing process of a double-zero aluminum foil, in particular to a finished annealing process of an A1235 / 8079 alloy double-zero aluminum foil. Background technique [0002] Most of the double-zero aluminum foil is used after softening annealing. Usually, the purpose of annealing the finished aluminum foil is: one is to control the mechanical properties of the aluminum foil, and the other is to eliminate the residual oil on the surface of the aluminum foil and obtain a bright, clean, and oil-free surface quality. And it can be unfolded freely; the current double-zero aluminum foil finished annealing process in aluminum processing plants is: first low-temperature annealing to remove oil, and then high-temperature annealing to reduce mechanical properties, so as to obtain products with clean surfaces and performance that meet the requirements of do...

AI Technical Summary

Problems solved by technology

[0003] 1. In the heating process step, the heating rate has not been effectively controlled, which is not conducive to the uniform heating of the coil, and may easily lead to hot drums;

[0004] 2. In the process steps of low-temperature annealing and degreasing, low-temperature annealing and degreasing first is not conducive to the rapid degreasing of aluminum foil, which makes the annealing efficiency lower;

[0005] 3. In the high-temperature annealing process step, high-temperature annealing after low-temperature annealing and degreasing will reduce the mechanical properties of the aluminum foil; after the low-temperature annealing and degreasing process, due to the low oil content on the surface of the aluminum foil, it is easy to cause stickiness on both sides of the aluminum foil and poor adhesion ; And it is easy to cause low mechanical properties during high temperature annealing;

[0006] In recent years, with the continuous improvement of user requirements for aluminum foil surface quality, degreasing effect, mechanical properties, uncoiling and unwinding performance, the existing aluminum foil has been difficult to meet the needs of downstream users