Preparation method of aluminum alloy for aerosol bottle cap

Abstract

The invention provides a preparation method of an aluminum alloy for an aerosol bottle cap. The method comprises the steps of S1, preparing a cast ingot through alloy components based on the mixing ratio; S2, milling the cast ingot; S3, uniformly thermally processing the cast ingot; S4, performing hot rolling on the cast iron to obtain a blank; S5, performing cold rolling to the blank which is subjected to hot rolling until the intermediate annealing thickness is reached; S6, washing the surface with weak alkali; S7, completely recrystallizing and annealing the middle; S8, performing pass rolling on a finished product; S9, stably chemically processing the finished product; and S10, stretching and bending and correcting back roll. According to the method, the Na content is effectively decreased based on the component mixing ratio and the technical method; the range of Na element which easily causes Na embrittlement in a high-magnesium alloy is avoided, and thus the problem of Na embrittlement is solved; and meanwhile, the component fluctuation is well controlled, and the problem that the magnesium element easily results to slag inclusion is solved; and meanwhile, the problem of liquid leaking caused by impurities adhering to the surface can be solved by a special weak alkali washing technology in the middle process; and the produced aluminum alloy for the aerosol bottle cap is high in stability in batch.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy preparation, and more specifically relates to a method for preparing an aluminum alloy for an aerosol bottle cap. Background technique [0002] At present, bottled aerosol cans are widely used due to their portability / smallness and practicality. The can lid is subject to relatively high pressure. At present, the aerosol bottle body and bottle cap are made of various materials such as PVC plastic / tinplate / aluminum. PVC plastic is generally easy to be injection molded, but because the aerosol bottle is a pressurized liquid, The overall strength of PVC plastic is low, and it is easy to crack during use to cause liquid leakage and be scrapped. Therefore, the utilization rate in the industry is not high, and the strength of tinplate is relatively high. However, due to the limitation of processing technology, the material of the manufactured aerosol bottle needs to be thicker. Material, plus the...

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Problems solved by technology

[0006] The present invention combines the use requirements of the can lid of the aerosol can, selects aluminum-magnesium alloy as the material of the can lid, adjusts the composition and processing technology, solves the problems of slag inclusion caused by magnesium elements, and makes up for the existing plastic materials, tinplate materials, Technical defects of other aluminum alloys

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