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Low-manganese aluminum alloy for cathode foil and preparation method thereof

A manganese-aluminum alloy and cathode foil technology, applied in the field of aluminum alloy processing, can solve the problems affecting the performance of cathode foil, surface dust blackening, layered corrosion, etc., and achieve the effects of high dislocation density, reducing looseness and saving energy.

Active Publication Date: 2014-12-17
广西南南铝加工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the aluminum-manganese-based aluminum alloys used for cathode foil are mainly alloys such as 3003 with a manganese content of 0.7-1.5% (mass percentage), and the cathode foil of 3003 aluminum-manganese alloy has the following disadvantages: (1) High manganese content, Composition segregation occurs during casting, which is easy to form a coarse second phase, resulting in layered corrosion when the aluminum foil is corroded at the end; (2) the strength is high, and a large rolling force is required during rolling; (3) It is very easy to produce surface dust and blackening when the aluminum foil corrodes and forms holes, which seriously affects the performance of the cathode foil

Method used

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  • Low-manganese aluminum alloy for cathode foil and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Take the production of 0.018mm thick cathode foil as an example:

[0023] By weight percentage: Mn: 0.3%, Fe: 0.2%, Cu: 0.1%, Si≤0.15%, Mg≤0.08%, Zn≤0.05%, Ti≤0.15%, individual content of other impurity elements≤0.05%, other impurities The total element content is ≤0.15%, and the balance is Al, which is used for batching.

[0024] (1) Smelting: After adding more than 99.75% aluminum ingots into the melting furnace and melting at 720°C, intermediate alloying elements are added by weight percentage. During the smelting process, aluminum titanium boron wire is added online, and after online degassing, slag removal, Refining and static treatment, after the sampling analysis is qualified, the alloy aluminum water is filtered;

[0025] (2) Casting: casting the melted and refined aluminum alloy solution into an aluminum alloy ingot at a casting temperature of 690°C to obtain an aluminum alloy ingot;

[0026] (3) Homogenization: the cast ingots are put into the heating furna...

Embodiment 2

[0032] Take the production of 0.025mm thick cathode foil as an example:

[0033] By weight percentage: Mn: 0.4%, Fe: 0.25%, Cu: 0.15%, Si≤0.15%, Mg≤0.08%, Zn≤0.05%, Ti≤0.15%, individual content of other impurity elements≤0.05%, other impurities The total element content is ≤0.15%, and the balance is Al, which is used for batching.

[0034] (1) Smelting: After adding more than 99.75% aluminum ingots to the melting furnace and melting them at a temperature of 730°C, intermediate alloy elements are added according to the weight percentage. During the smelting process, aluminum titanium boron wire is added online, and after online degassing, slag removal, Refining and static treatment, after the sampling analysis is qualified, the alloy aluminum water is filtered;

[0035] (2) Casting: cast the melted and refined aluminum alloy solution into an aluminum alloy ingot at a casting temperature of 700°C to obtain an aluminum alloy ingot;

[0036] (3) Homogenization: the cast ingots ...

Embodiment 3

[0042] Take the production of 0.040mm thick cathode foil as an example:

[0043] By weight percentage: Mn: 0.4%, Fe: 0.3%, Cu: 0.2%, Si≤0.15%, Mg≤0.08%, Zn≤0.05%, Ti≤0.15%, other impurity element single content≤0.05%, other impurities The total element content is ≤0.15%, and the balance is Al, which is used for batching.

[0044] (1) Smelting: After adding more than 99.75% aluminum ingots into the melting furnace and melting at 750°C, intermediate alloying elements are added by weight percentage. During the smelting process, aluminum titanium boron wire is added online, and after online degassing, slag removal, Refining and static treatment, after the sampling analysis is qualified, the alloy aluminum water is filtered;

[0045] (2) Casting: cast the melted and refined aluminum alloy solution into an aluminum alloy ingot at a casting temperature of 720°C to obtain an aluminum alloy ingot;

[0046] (3) Homogenization: the cast ingots are put into the heating furnace, kept at...

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Abstract

The invention relates to a low-manganese aluminum alloy for a cathode foil and a preparation method thereof. The low-manganese aluminum alloy is characterized by comprising the following chemical components in percentage by weight: 0.30-0.60% of Mn, 0.20-0.40% of Fe, 0.10-0.20% of Cu, Si not higher than 0.15%, Mg not higher than 0.08%, Zn not higher than 0.05%, Ti not higher than 0.15%, other impurity elements with single content not higher than 0.05%, other impurity elements with total content not higher than 0.15%, and the balance of Al. According to the low-manganese aluminum alloy of the present invention, the content of alloy elements is reduced, so that the alloy strength is reduced, the rolling force during rolling is reduced, the processing difficulty is reduced, and the energy is saved; and the cathode foil produced by the low-manganese aluminum alloy has the advantages of good surface quality, no dust, uniform structure and high specific capacitance.

Description

technical field [0001] The invention relates to the field of aluminum alloy processing, in particular to a low-manganese aluminum alloy for cathode foil and a preparation method thereof. Background technique [0002] Cathode electronic aluminum foil is one of the important raw materials for manufacturing aluminum electrolytic capacitors. At present, the commonly used materials for the preparation of cathode electronic aluminum foil are pure aluminum (1XXX series), aluminum-copper (2XXX) and aluminum-manganese (3XXX), among which the aluminum-manganese series aluminum alloy has less thinning during the corrosion process, and is "sponge-like" and uniformly corroded , can effectively expand the surface area of ​​the cathode foil, increase the specific capacitance, have high strength, and are not suitable for broken strips. It is widely used. At present, the aluminum-manganese-based aluminum alloys used for cathode foil are mainly alloys such as 3003 with a manganese content of...

Claims

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Application Information

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IPC IPC(8): C22C21/00C22C1/02C22F1/04
Inventor 朱玉涛黄相博龙旭初刘莹徐艳萍曾光黄程毅
Owner 广西南南铝加工有限公司
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