Annealing method in high-voltage electronic aluminum-foil production for high-capacity high-strength capacitor

An electronic aluminum foil, high-strength technology, applied in the direction of metal rolling, coating, anti-corrosion coating, etc., can solve the problems of uneven casting structure, shorten the production cycle, etc., to avoid coarse grains, eliminate uneven casting, and avoid moisture The effect of residual oxidation

Active Publication Date: 2021-08-10
广西广投正润新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies in the prior art, the present invention provides an annealing method in the production of medium and high voltage electronic aluminum foils for high-capacity and high-strength capacitors, using a continuous air cushion furnace for homogenization and annealing for many times to improve the problem of uneven casting structure, thereby improving performance and cubic texture, to obtain a high-capacity high-strength high-voltage high-purity aluminum foil for capacitors, which not only improves the specific capacity, but also shortens the production cycle

Method used

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  • Annealing method in high-voltage electronic aluminum-foil production for high-capacity high-strength capacitor
  • Annealing method in high-voltage electronic aluminum-foil production for high-capacity high-strength capacitor
  • Annealing method in high-voltage electronic aluminum-foil production for high-capacity high-strength capacitor

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Embodiment 1

[0045] The annealing method in the production of medium and high voltage electronic aluminum foil for high-capacity and high-strength capacitors includes the following steps:

[0046] Preparation of cold rolled coils:

[0047] ①Casting: After smelting, heat preservation, refining and standing still, the raw materials of high-purity molten aluminum casting are used to produce flat ingots by semi-continuous casting. The casting temperature is 695°C, and the formed flat ingots are obtained by rapid cooling;

[0048] ② Homogenization: Homogenize the shaped slab obtained in the above step through an annealing furnace, the homogenization temperature is 570°C, the homogenization time is 19h, and air-cool to room temperature after homogenization;

[0049] ③Hot rolling: The slab after the homogenization treatment in the previous step is hot-rolled by an integrated roughing and finishing rolling unit. The hot-rolling starting temperature is 520°C and the finishing rolling temperature is...

Embodiment 2

[0057] The annealing method in the production of medium and high voltage electronic aluminum foil for high-capacity and high-strength capacitors includes the following steps:

[0058] The preparation of cold-rolled coils is the same as in Example 1;

[0059] 1) Cleaning and intermediate annealing: The cold-rolled coils after cold rolling are cleaned with deionized water containing alkaline additives, rinsed with deionized water, the water temperature is controlled at 75°C, and the outlet is dried with high-pressure air Squeeze dry with a squeeze roller, and carry out intermediate annealing in a belt-type continuous air cushion furnace. The annealing temperature is 300°C, and the annealing speed is 40m / min. After annealing, it is air-cooled to room temperature;

[0060] 2) Foil rolling: 7% deformation is applied through foil rolling, the finished product pass adopts bright rolling with a reduction of ≤2% in the finished pass, the foil rolling speed is 150m / min, and the thicknes...

Embodiment 3

[0065] The annealing method in the production of medium and high voltage electronic aluminum foil for high-capacity and high-strength capacitors includes the following steps:

[0066] The preparation of cold-rolled coils is the same as in Example 1;

[0067] 1) Cleaning and intermediate annealing: The cold-rolled coils after cold rolling are cleaned with deionized water containing alkaline additives, rinsed with deionized water, the water temperature is controlled at 70°C, and the outlet is dried with high-pressure air. Squeeze the dry roll, and carry out intermediate annealing in the continuous air cushion furnace with the belt type, the annealing temperature is 350 ℃, the annealing speed is 30m / min, and air cooling to room temperature after annealing;

[0068] 2) Foil rolling: apply 45% deformation through foil rolling, the finished product pass adopts bright rolling with a reduction of 3% in the finished pass, the foil rolling speed is 200m / min, and the thickness of the fin...

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Abstract

The invention discloses an annealing method in high-voltage electronic aluminum-foil production for a high-capacity high-strength capacitor. The annealing method comprises the following steps: performing intermediate annealing in a belt mode through a continuous type gas cushion furnace, uniformly heating an aluminum belt, controlling speed by the continuous type gas cushion furnace during heating, guaranteeing growth consistency of grown crystalline grains as annealing time is stable and controllable, thereby obtaining a uniform structure; eliminating internal stress, and reducing aluminum foil processing hardening degree; performing aluminum foil finished product annealing by the continuous type gas cushion furnace, and controlling a regrowth rate of the crystalline grains in a mode of annealing at different temperatures in multiple regions, changing a non-cubic texture into a cubic texture, increasing the proportion of the cubic texture, enriching trace elements on the surface, and increasing a corrosion porosity; and quickly cooling and coiling after discharging to prevent surface damages due to blocking under warming.

Description

【Technical field】 [0001] The invention relates to the technical field of medium and high voltage electronic aluminum foil processing, in particular to an annealing method in the production of medium and high voltage electronic aluminum foil for high-capacity and high-strength capacitors. 【Background technique】 [0002] Miniaturization is an inevitable trend in the development of aluminum electrolytic capacitors. With the rapid development of electrical and electronic industries, aluminum electrolytic capacitors continue to develop towards high performance, miniaturization, and integration. Therefore, it is necessary to meet the needs of aluminum electrolytic capacitors by increasing the specific capacity of high-purity aluminum foil. In order to meet the demand for miniaturization of capacitors, it is also necessary to increase the output of pure aluminum foil to meet the increasing demand of the market. [0003] The existing annealing method in the production of medium and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/04C22F1/02C23G5/06B21B3/00B21B1/40C09D1/00C09D5/08
CPCC22F1/04C22F1/02C23G5/06B21B3/00B21B1/40C09D1/00C09D5/08B21B2003/001Y02E60/13
Inventor 胡传彬黄奎覃雪伍志铭李永春贾桂龙刘挺尹建平黄玉芳
Owner 广西广投正润新材料科技有限公司
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