Method for reducing annealing defect of aluminum product

Abstract

The invention discloses a method for reducing the annealing defect of an aluminum product. In the stretch-straightening and washing process of an aluminum strip, after a material tail is separated from the strip, the aluminum strip and the two ends of an aluminum strip on the outermost ring of an aluminum roll are welded and fixed at the rolling position of the aluminum strip till the whole aluminum strip is rolled. After the aluminum strip is stretch-straightened and washed and is rolled, the outer ring of the aluminum roll is fixed, and then a finished product annealing procedure is executed. According to the method for reducing the annealing defect of the aluminum product, the two-end welding manner is adopted for welding and fixing the aluminum strip obtained after the material tail is separated from the strip and the aluminum strip on the outermost ring, the portion with unstable rolling tension and small rolling tension and the aluminum roll on the portion with normal rolling tension can be isolated, and the problem that the layers of the aluminum roll within the number of the welding layers of the aluminum strip are loosened can be effectively avoided. Therefore, annealing bind-damaging defects caused by layer loosening are overcome.

Description

technical field [0001] The invention belongs to the technical field of production and processing of aluminum materials, in particular to a method for reducing annealing defects of aluminum materials. Background technique [0002] Generally, after the finished annealed aluminum strip is cleaned by the tension leveling process, the outer ring of the aluminum coil needs to be fixed, and the fixing method is usually used in combination with one of the following three methods. [0003] 1) Use the adhesive tape transfer head to stick tightly; [0004] 2) Longitudinally use aluminum tape to wrap the outer ring of the aluminum coil tightly, and the aluminum tape is generally used for aluminum materials with a thickness of ≤1.0mm; [0005] 3) Tighten the outer ring of the aluminum coil longitudinally with a steel strip, which is generally used for aluminum with a thickness > 1.0mm. [0006] There are two main quality problems in the above-mentioned method of fixing the outer rin...

AI Technical Summary

Problems solved by technology

[0006] There are two main quality problems in the above-mentioned method of fixing the outer ring of the aluminum coil: after annealing the aluminum coil that is stripped longitudinally, due to the difference in the thermal deformation coefficient of the aluminum material and the thermal deformation coefficient of the steel material, the aluminum material will be corresponding to the steel strip after annealing. position will produce more obvious annealed strangulation

[0007] In addition, when the finished aluminum strip is cleaned in the over-stretching and straightening process before annealing, the coiling tension is small and unstable when the tail is stripped off and threaded, resulting in insufficient coiling tension for the outer ring of the aluminum coil. During the process, there is a slight misalignment between the layers, which leads to dense point-like sticking damage on the outer ring of the aluminum coil

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