A kind of production method of aluminum foil blank

Abstract

The invention discloses a method for producing an aluminum foil blank. The problem that the conventional blank difficultly meets the requirements on high strength of the finished product and fewer pinholes is solved. The aluminum foil blank disclosed by the method comprises the following chemical components in percentage by weight: less than 1.65 percent of Fe+Si, less than 0.05 percent of Cu, less than 0.05 percent of Mn, less than 0.05 percent of Mg, less than or equal to 0.05 percent of Cr, less than 0.1 percent of Zn and less than 0.06 percent of Ti, wherein the ratio of Fe to Si is 1.5-3.0. The production process comprises the following steps: performing cast rolling (the thickness is 5-15mm), performing cold rolling (the total deformation is 60-80 percent), performing high-temperature annealing (500-520 DEG C per 6-8 hours), performing cold rolling (the total deformation is 65-85 percent), and performing medium temperature annealing (380-400 DEG C per 2-4 hours). The aluminum foil blank produced by the invention is uniform and reasonable in tissue distribution and has high processability, and the produced finished product has good service performance.

Description

technical field [0001] The invention specifically relates to a method for producing aluminum foil blanks by using cast-rolled plates, and belongs to the technical field of non-ferrous metal materials. Background technique [0002] Aluminum foil blank is an intermediate product in foil production. The type, size, distribution and grain size of the second phase of the blank will affect the processing performance of the blank and the pinhole rate and strength of the finished aluminum foil. The thinner the product, the more obvious the effect. Therefore, the distribution state of the aluminum foil blank structure determines the processing performance of the blank itself and the quality of the finished aluminum foil. At present, there are mainly three difficulties in the production of high-quality aluminum foil blanks by casting and rolling. [0003] First of all, the production of aluminum foil mainly uses 1XXX series aluminum alloys such as 1235 with relatively low Fe and Si c...

AI Technical Summary

Problems solved by technology

[0006] The uneven structure of the surface layer and the central layer of the cast-rolled sheet is determined by the production method and is inevitable. Therefore, the material structure can only be regulated from the chemical composition and production process in production.

Some enterprises try to reduce the Fe and Si content to reduce the adverse effects of Fe and Si phases, and increase the strength of the alloy by adding other elements, but the addition of other elements brings the adverse effects of other second phases and the difficulty of regulation

Some enterprises further restrict the range of Fe and Si content on the basis of the national standard. This method can sometimes produce qualified products, but the stability is very poor, and the product performance cannot be guaranteed if the composition is within the control range. qualified

In addition, the problem of poor stability of the production process is also obvious, especially when there are changes in factors such as composition, original thickness of cast-rolled sheet, thickness of aluminum foil blank, etc.

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