CN1552929A - High specific capacitance alloy foil and production method thereof - Google Patents

Abstract

The invention discloses a high specific capacitance alloy foil and a production method thereof, relating to an aluminum-based alloy and a production method thereof, wherein the alloy comprises the following components in parts by weight: cu0.2 to 0.25 percent of Cu0.04 to 0.06 percent of Mg0.20 percent of Zn0.1 to 0.4 percent of Mn0.8 to 1.0 percent of Fe0.8 to 1.0 percent of Si1.0 percent of Ti0.2 percent of Al100, preparing raw materials, forging, carrying out homogenization treatment at 600 ℃, carrying out hot rolling at 500 ℃ to form a thick coil, carrying out cold rolling and intermediate annealing treatment, controlling the intermediate annealing temperature at 380 ℃ to 420 ℃, and finally rolling to form a foil material with the thickness of 0.04 to 0.05 mm. The product manufactured by the method has ideal corrosion speed, can form a uniform porous corrosion surface under specified conditions, and has specific capacitance up to 370-430 Ufcm.

Description

High specific capacitance alloy foil and production method thereof

Technical field: what the present invention relates to is an alloy with high specific capacitance and its production method.

Background technology: In the existing technology, in order to increase the specific capacitance, the raw materials are generally chemically etched in an acid solution to form a porous corrosion layer on the surface and expand the surface area. Existing specific capacitance plate, its composition (weight percent) is Cu←0.20, Mg←0.05, Zn←0.10, Mn1.0-1.6, Fe←0.7, Si←0.60, Ti←0.15, other impurity summature←0.10( single element ←0.05) and the balance of Al. The specific capacitance of this alloy can only reach 80uFcm, and it is corrosion-resistant, with low corrosion rate and low production efficiency.

Invention content:

The object of the present invention is to provide an alloy foil material that can obtain an ideal corrosion surface and high specific capacitance, and provide a production method for an alloy foil that can obtain an ideal corrosion surface and high specific capacitance.

The purpose of the present invention is achieved like this:

A high-capacitance alloy foil, the alloy composition weight ratio is: Cu0.2-0.25, Mg0.04-0.06, Zn0.20, Mn0.1-0.4, Fe0.8-1.0, Si1.0, Ti0. 2. Al100, made of foil with a thickness of 0.04-0.05mm.

The above-mentioned high-capacitance alloy foil has an alloy composition of Cu0.2, Mg0.3, Zn0.20, Mn0.3, Fe1.0, Si1.0, Ti0.3, Al100 in parts by weight.

A production method of high specific capacitance alloy foil, according to the ratio of alloy components by weight: Cu0.2-0.25, Mg0.04-0.06, Zn0.20, Mn0.1-0.4, Fe0.8-1.0, Si1. 0, Ti0.2, Al100 or Cu0.2, Mg0.3, Zn0.20, Mn0.3, Fe1.0, Si1.0, Ti0.3, Al100, prepare raw materials, forge, and homogenize at 600°C For processing, hot rolling is carried out at 500°C to form thick coils, and then cold rolling is carried out, followed by intermediate annealing treatment. The intermediate annealing temperature is controlled at 380-420°C, and finally rolled into 0.04-0.05mm thick foil.

In the production method of the above-mentioned high specific capacitance alloy foil, the holding time of the homogenization treatment is 8 hours.

The advantages of the present invention are:

1. Zn and Mn are regarded as impurities in traditional aluminum alloys, and their content needs to be strictly controlled. In this product, Zn and Mn are added to the alloy in a relatively high amount as a necessary additive element, and the process method of the present invention is adopted The finished product has a faster corrosion rate than ordinary aluminum alloys, forms a uniform porous corrosion surface after corrosion, and improves specific capacitance. The specific capacitance of the product of the invention reaches 380-430uFcm. Its production method is relatively easy to implement, and increasing the content of Cu and Mg within the effective range will be beneficial to the improvement of product quality.

2. Alloy foil is often used in automobile air conditioners. The structure of the original radiator is that multiple pipes are inserted into the composite foil and then brazed. Damaged pipes can be replaced during use. With the application of porous flat tubes produced by continuous extrusion technology in automotive air strips, new requirements are gradually put forward for brazed composite foils for heat dissipation. The automotive air conditioner made of porous flat is brazed together with a composite foil after processing a porous tube. In this way, once one part of the flat tube is damaged, it will be scrapped as a whole, and the corrosion resistance of the existing composite foil is stronger than that of the material of the porous flat tube. Therefore, in the process of use, the porous flat tube is often damaged before the composite foil, resulting in the overall scrap. This product is a brazing composite foil that can not only meet the brazing requirements, but also corrode before the porous flat tube under working conditions, reducing the damage rate of the porous flat tube.

Example 1.

High specific capacitance alloy foil, alloy composition weight ratio: Cu0.2 or 0.22 or 0.25, Mg0.04 or 0.05 or 0.06, Zn0.20, Mn0.1 or 0.25 or 0.4, Fe0.8 or 0.9 or 1.0, Si1.0, Ti0.2, Al100, made of foil with a thickness of 0.04-0.05mm.

The specific production method is: preparing raw materials, forging, homogenizing treatment at 600°C, hot rolling at 500°C into thick coils, cold rolling and then intermediate annealing treatment, the intermediate annealing temperature is controlled at 380-420°C, and finally Rolled into 0.04-0.05mm thick foil.

Example 2.

High specific capacitance alloy foil, the weight ratio of alloy components is Cu0.2, Mg0.3, Zn0.20, Mn0.3, Fe1.0, Si1.0, Ti0.3, Al100. The production method is: prepare raw materials according to the ratio, forge, homogenize at 600°C, hot-roll at 500°C to form a thick coil, then cold-roll and then carry out intermediate annealing treatment, and the intermediate annealing temperature is controlled at 380-420°C , and finally rolled into 0.04-0.05mm thick foil. The heat preservation time of the homogenization treatment is 8-10 hours.

Claims (4)

1. A high specific capacitance alloy foil, characterized in that: the ratio of alloy components by weight and number is: Cu0.2-0.25, Mg0.04-0.06, Zn0.20, Mn0.1-0.4, Fe0.8-1.0, Si1.0, Ti0.2, Al100, made of foil with a thickness of 0.04-0.05mm. 2. The high specific capacitance alloy foil according to claim 1, characterized in that: the weight ratio of the alloy components is Cu0.2, Mg0.3, Zn0.20, Mn0.3, Fe1.0, Si1.0, Ti0.3, Al100. 3. A production method of high specific capacitance alloy foil, characterized in that: according to the ratio of parts by weight of the combined box components: Cu0.2-0.25, Mg0.04-0.06, Zn0.20, Mn0.1-0.4, Fe0 .8-1.0, Si1.0, Ti0.2, Al100 or Cu0.2, Mg0.3, Zn0.20, Mn0.3, Fe1.0, Si1.0, Ti0.3, Al100, preparation of raw materials, forging , homogenized at 600°C, hot-rolled at 500°C into thick coils, then cold-rolled and then intermediate annealed, the intermediate annealing temperature is controlled at 380-420°C, and finally rolled into 0.04-0.05mm thick foil . 4. The production method of high specific capacitance alloy foil according to claim 3, characterized in that: the holding time of the homogenization treatment is 8 hours.