1100-O state aluminum alloy strip for capacitor housing and production method thereof

Abstract

The invention discloses a 1100-O state aluminum alloy strip for a capacitor housing and a production method thereof. The production method comprises the steps that firstly, various alloy components are prepared according to the composition ratios of the 1100-O state aluminum alloy strip, then the alloy components are sequentially smelted, statically refined and degassed, a grain refiner is added,filtration is carried out, then semi-continuous casting carried out to obtain ingots, the obtained ingots are sequentially subjected to homogenization heat treatment, hot rolling, cold rolling, intermediate annealing, cold rolling again to the thickness of a finished product, stretch bending straightening and cleaning, plate form stretching and slitting, and finally finished product annealing, inspection and packaging are carried out. The product obtained by using the technical scheme is high in dimensional accuracy, good in isotropy, high in molding rate, fine in surface crystal grain and fine and smooth in surface after deep drawing, and has less than or equal to 2.5% of ear-making rate. Therefore, the use requirements of the current market for high precision capacitor housings can be completely met.

Description

[0001] 1. Technical field: [0002] The invention relates to the technical field of metal manufacturing, in particular to a 1100-O state aluminum alloy strip for capacitor shells and a production method thereof. [0003] 2. Background technology: [0004] At present, the shells of ordinary domestic capacitors are mostly stamped from pure aluminum strips with an aluminum content of more than 99%, such as 1050, 1060 and other brands, which have low prices and good processability. However, with the development of capacitors in the direction of miniaturization and aesthetics in recent years, the surface of the shell is required to be smooth and beautiful after stamping, and the ear-making rate during molding is extremely strict. At present, the industry has verified that the 1100 series replaces the 1060 series in the production of capacitor shells to improve product performance, but most of the cast and rolled blanks are produced in the 1100-O state. Relatively speaking, the surfa...

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Problems solved by technology

[0005] So far, in order to solve the technical problems existing in the existing 1100-O state aluminum alloy products such as fine and smooth surface after stamping, slightly poor smoothness and high ear making rate, etc.