Production method of 3003-brand cathode aluminum foil

A cathode aluminum foil and manufacturing method technology, applied to electrolytic capacitors, electrical components, circuits, etc., can solve problems such as delamination corrosion, coarse grains of products, and growth of recrystallized grains

Inactive Publication Date: 2009-09-02
登电集团铝加工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The grain size of the 3003 grade cathode aluminum foil has a great influence on corrosion. The 3003 series aluminum alloy contains Mn element, and the degree of supersaturation of the solute element in the solid solution of the cast-rolled plate is greatly improved. The alloy has a strong supercooling ability. During rapid cooling, the concentration distribution of Mn is not uniform, resulting in large intragranular segregation, resulting in serious growth of recrystallized grains.
[0010] At present, there are still some defects in the production of cathode aluminum foil. The existing method is to directly perform recrystallization annealing after casting and rolling, but the grains of the product after annealing are coarse, which is easy to cause delamination corrosion, resulting in a decrease in specific volume, which directly affects the quality of the product.
Moreover, the existing method needs to cast the electrolytic aluminum melt into aluminum ingots and then remelt them before casting and rolling. The process is cumbersome, and it causes waste of resources, high production costs, and does not conform to the sustainable development strategy.

Method used

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  • Production method of 3003-brand cathode aluminum foil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: Take the 3003 brand cathode aluminum foil with a thickness of 0.041mm as an example:

[0020] a. Send the electrolytic aluminum melt to the smelting furnace, add aluminum ingots accounting for 20% of the total weight of the electrolytic aluminum melt, control the temperature of the melt at 750°C, and adjust the mass percentage of each element in the melt to: Si: 0.1% , Fe: 0.5%, Cu: 0.1%, Mn: 1.1%, Ti: 0.02%, and the balance is Al; use pure nitrogen to spray powder refining agent SY-PJ1 into the melt for refining, and the addition of SY-PJ1 is adjusted 0.1% of the weight of the melt after the element composition, fully stir evenly, refining time is 8 minutes, then stand for 15 minutes, remove the scum on the surface of the molten aluminum, pour it into the static furnace, and control the temperature in the static furnace to 750 ° C; The aluminum liquid in the static furnace is sent into the launder, and the aluminum titanium boron wire is added reversely t...

Embodiment 2

[0024] Embodiment 2: Take the 3003 brand cathode aluminum foil with a thickness of 0.041mm as an example:

[0025] a. Send the electrolytic aluminum melt to the smelting furnace, add aluminum ingots accounting for 40% of the total weight of the electrolytic aluminum melt, control the temperature of the melt at 780°C, and adjust the mass percentage of each element in the melt to: Si: 0.12% , Fe: 0.48%, Cu: 0.12%, Mn: 1.15%, Ti: 0.03%, and the balance is Al; use pure argon to spray powder refining agent SY-PJ1 into the melt for refining, and the amount of SY-PJ1 added is After adjusting the elemental composition to 0.4% of the melt weight, fully stir it evenly, the refining time is 10 minutes, and then stand still for 25 minutes to remove the scum on the surface of the molten aluminum, pour it into a standing furnace, and control the temperature in the standing furnace to 760°C; Feed the liquid aluminum in the static furnace into the launder, add aluminum titanium boron wire in ...

Embodiment 3

[0029] Embodiment 3: Take the 3003 brand cathode aluminum foil with a thickness of 0.041mm as an example:

[0030]a. Send the electrolytic aluminum melt to the smelting furnace, add aluminum ingots accounting for 30% of the total weight of the electrolytic aluminum melt, control the temperature of the melt to 770°C, and adjust the mass percentage of each element in the melt to: Si: 0.15% , Fe: 0.45%, Cu: 0.15%, Mn: 1.2%, Ti: 0.04%, and the balance is Al; use pure nitrogen to spray powder refining agent SY-PJ1 into the melt for refining, and the addition of SY-PJ1 is adjusted 0.3% of the weight of the melt after the element composition, fully stirred evenly, the refining time was 9 minutes, and then stood still for 20 minutes to remove the scum on the surface of the molten aluminum, pour it into a standing furnace, and control the temperature in the standing furnace to 755°C; The aluminum liquid in the static furnace is sent into the launder, and the aluminum titanium boron wir...

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Abstract

The invention relates to a production method of 3003-brand cathode aluminum foil, which includes the following steps: a. raw materials are refined and rolled into a blank with the thickness of 6.5 mm to 8.5 mm; b. the blank obtained in step a is rolled into the blank with the thickness of 3.5 mm to 4.3 mm in a cooling mode to be uniformly annealed; c. the uniformly-annealed blank is rolled into the blank with the thickness of 0.3 mm to 0.5 mm in a cooling mode to be recrystallized and annealed; and d. the recrystallized-and-annealed blank is rolled into the 3003-brand cathode aluminum foil with the required thickness. The method of the invention enables the cost to be lower and the product quality to be better, the specific capacitance of the product is increased to be higher than 530 microfarads /cm<2>, and the highest specific capacitance can be 560 microfarads /cm<2>. The invention greatly improves the product competitive strength, reduces the disparity with abroad products, and makes a contribution for the trade progress.

Description

technical field [0001] The invention belongs to the field of aluminum alloy material manufacturing, and in particular relates to a method for manufacturing a 3003 brand cathode aluminum foil. Background technique [0002] With the rapid development of electronic technology, the assembly density and integration of electronic machines are increasing. As a key, non-integrable discrete component, electrolytic capacitors are moving towards small size, large capacity, low cost, high frequency and low impedance. direction development. Aluminum electrolytic capacitors are widely used due to their excellent performance, low price, easy processing, and convenient use. Because the 3003 aluminum alloy material has the characteristics of good machining performance, corrosion resistance, heat dissipation performance, anti-electromagnetic interference performance, low density and excellent mechanical properties, it has been recognized by the market as the cathode aluminum foil of aluminum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/04C21D1/26H01G9/045
Inventor 胡冠奇毕书军袁文晓文玉兴武进道牛荟晓袁杏利王吉东刘振伟张建平
Owner 登电集团铝加工有限公司
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