Production process of high purity aluminium foil for electrolytic capacity

An electrolytic capacitor and production process technology, applied in electrolytic capacitors, capacitors, circuits, etc., can solve the problems of poor quality and poor performance of electronic aluminum foil, achieve good economic and social benefits, curb price rises, and be very internationally competitive. Effect

Inactive Publication Date: 2007-01-03
黄涛 +1
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a high-efficiency production process of high-purity aluminum foil for electrolytic capacitors, which solves the problem of poor quality and performance of electronic aluminum foil produced by domestic traditional equipment and technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Get 200mm (length) * 50mm (width) * 7.5mm (thick) high-purity aluminum (Al≥99.99%Wt.) hot-rolled plate, press 1.06 speed ratio, present embodiment adopts 4 pass rolling, rolling The pressing amount is 40%, 30%, 20%, and 9.2% in turn, and the deformation amount reaches 99.2% and is asynchronously cold-rolled into high-purity aluminum foil. Wash with NaOH solution, mark the rolling direction, and obtain the cold-rolled texture sample. Put the cold-rolled sample into the pass with N 2 In the tubular annealing furnace with protective gas, the temperature was raised with the furnace at a heating rate of 10°C / min. When the temperature rises to 600°C, it is kept for 3 hours and quenched in water to obtain an annealed texture sample.

[0022] The texture of the cold-rolled and annealed samples was measured respectively. The texture was measured on the D / max-IIIA X-ray diffractometer and the B-7 semi-automatic texture measuring angle table in the Northeastern University Test C...

Embodiment 2

[0024] Get 200mm (length) * 50mm (width) * 7.5mm (thick) high-purity aluminum hot-rolled plate, according to the speed ratio of 1.17, the present embodiment adopts 3 pass rolling, and the amount of rolling down is 45% successively , 35%, 18.7%, reaching a deformation of 98.7% asynchronously cold-rolled into high-purity aluminum foil, the size after rolling is 0.1mm thick, cut a 20mm×20mm sample, clean the surface with NaOH solution, mark the rolling direction, and obtain a cold As-rolled texture samples. Put the cold-rolled sample into the pass with N 2 In the tubular annealing furnace with protective gas, the temperature was raised with the furnace at a heating rate of 10°C / min. When the temperature rose to 500°C, it was kept for 2 hours and quenched in water to obtain an annealed texture sample. The cubic texture volume fraction of the high-purity aluminum foil prepared by the process is measured to be 95.0%.

Embodiment 3

[0026] Get 200mm (length) * 50mm (width) * 7.5mm (thick) high-purity aluminum hot-rolled plate, according to the speed ratio of 1.17, the present embodiment adopts 3 pass rolling, and the rolling down force is 42% successively , 38%, and 16.7%, reaching 96.7% of deformation, asynchronously cold-rolled into high-purity aluminum foil. As-rolled texture samples. Put the cold-rolled sample into the pass with N 2 In the tubular annealing furnace with protective gas, the temperature is raised with the furnace at a heating rate of 5°C / min. When the temperature rises to 400°C, it is kept for 2 hours and quenched in water to obtain an annealed texture sample. The cubic texture volume fraction of the high-purity aluminum foil prepared by the process is measured to be 95.57%.

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Abstract

The present invention provides the high effect production process of high purity aluminum foil for electrolytic capacitor, and the production process includes the main steps of asynchronous cold rolling and heat treatment of high purity aluminum foil. The present invention features the asynchronous cold rolling at speed ratio of 1.05-1.30 and controlled aluminum foil rolling deformation state and rolling texture configuration to obtain great deformation high purity aluminum foil in less rolling turns; and continuous annealing in protecting atmosphere to produce high purity aluminum foil with very strong cube texture ultimately. Thus produced high purity aluminum foil for electrolytic capacitor has the advantages of one level raised asynchronous rolling precision compared with conventional rolling and {100} plane cube texture over 95%.

Description

technical field [0001] The invention belongs to the technical field of non-ferrous metal processing and heat treatment, in particular to a method for processing high-purity aluminum foil for electrolytic capacitors by adopting asynchronous rolling technology. Background technique [0002] At present, the output of precision electronic equipment in the world is increasing rapidly, so the demand for capacitors is also rapidly expanding. High-voltage electronic aluminum foil has become a hot spot for scientists and entrepreneurs from all over the world to research and develop. Internationally, very sophisticated and expensive special equipment is used to produce electronic aluminum foil, and its price is more than ten times that of domestic traditional processing equipment. At present, traditional equipment and technology are mostly used in China to produce electronic aluminum foil. Although the price is only half of imported products, it is basically not accepted by the market...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P23/04B21B1/40H01G9/00
Inventor 黄涛王福刘沿东高明田鹏左良
Owner 黄涛
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