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Brazing composite aluminum plate strip for heat exchanger and manufacturing method thereof

A technology of heat exchanger and composite aluminum, applied in the direction of metal rolling, etc., can solve the problem of low corrosion resistance, achieve the effect of ensuring brazing performance, easy realization, and reducing the flow distance

Active Publication Date: 2019-08-02
JIANGSU ALCHA ALUMINUM CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the deficiencies in the prior art above, the purpose of the present invention is to provide a brazed composite aluminum strip for heat exchangers to solve the problem of low corrosion resistance of the three-layer composite aluminum alloy strip

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1: 4343 alloy is used as the core layer material of the brazed composite aluminum strip for heat exchangers, and 3003 alloy is used as the material of the first cladding layer and the second cladding layer. Alloy composition by weight percentage: 3003 aluminum alloy, iron 0.60±0.05%, silicon ≤0.02%, copper 0.09±0.03%, manganese 1.2±0.1%, titanium 0.04±0.01%, the rest is aluminum; 4343 aluminum alloy, iron ≤0.25%, silicon 8.0±0.2%, copper ≤0.05%, manganese ≤0.05%, titanium ≤0.1%, and the rest is aluminum. The melting and casting process of the core layer material is as follows: melting the raw material according to the composition of the 4343 aluminum alloy at a melting temperature of 700°C, stirring for 10 minutes, refining at 750°C for 10 minutes, and casting at 700°C. The melting and casting process of the first cladding layer and the second cladding layer material is as follows: melting the raw materials according to the composition of the 3003 aluminum alloy...

Embodiment 2

[0022] Example 2: 4343 alloy is used as the core layer material of the brazed composite aluminum strip for heat exchangers, and 3003Mod alloy is used as the material of the first cladding layer and the second cladding layer. Alloy composition by weight percentage: 3003Mod aluminum alloy, iron 0.25±0.05%, silicon ≤0.2%, copper 0.45±0.05%, manganese 1.5±0.1%, titanium 0.15±0.05%, the rest is aluminum; 4343 aluminum alloy, iron ≤0.25%, silicon 8.0±0.2%, copper ≤0.05%, manganese ≤0.05%, titanium ≤0.1%, and the rest is aluminum. The melting and casting process of the core layer material is as follows: melting the raw materials according to the composition of the 4343 aluminum alloy at a melting temperature of 720°C, stirring for 10 minutes, refining at 740°C for 10 minutes, and casting at 720°C. The melting and casting process of the first cladding layer and the second cladding layer material is as follows: melt the raw materials according to the composition of the 3003Mod aluminum...

Embodiment 3

[0025]Embodiment 3: 4045 alloy is used as the core layer material of the brazed composite aluminum strip for heat exchangers, and 3003Mod alloy is used as the material of the first cladding layer and the second cladding layer. Alloy composition by weight percentage: 3003Mod aluminum alloy, iron 0.25±0.05%, silicon ≤0.2%, copper 0.45±0.05%, manganese 1.5±0.1%, titanium 0.15±0.05%, the rest is aluminum; 4045 aluminum alloy, iron ≤0.25%, silicon 10.25±0.25%, copper ≤0.05%, manganese ≤0.05%, titanium ≤0.1%, and the rest is aluminum. The melting and casting process of the core layer material is as follows: melting the raw materials according to the composition of the 4045 aluminum alloy at a melting temperature of 730°C, stirring for 15 minutes, refining at 750°C for 10 minutes, and casting at 730°C. The melting and casting process of the first cladding layer and the second cladding layer material is as follows: melt the raw materials according to the composition of the 3003Mod alu...

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Abstract

The invention discloses a brazing composite aluminum plate strip for a heat exchanger. The brazing composite aluminum plate strip is composed of a first coating layer, a core layer and a second coating layer which are stacked in sequence, wherein the first coating layer and the second coating layer are made of 3-series aluminum alloy, the core layer is made of 4-series aluminum alloy, and the corelayer accounts for 3%-20% of the total thickness of the brazing composite aluminum plate strip for the heat exchanger; the 3-series aluminum alloy comprises the following components of, in percentageby weight, 0.25%-0.65% of iron, 0.01%-0.45% of silicon, 0.06%-0.50% of copper, 1.0%-1.6% of manganese, 0.03%-0.2% of titanium, and the balance aluminum; the 4-series aluminum alloy comprises the following components of, in percentage by weight, 8.0%-11.0% of silicon, less than or equal to 0.25% of iron, less than or equal to 0.05% of copper, less than or equal to 0.05% of manganese, less than orequal to 0.1% of titanium, and the balance aluminum. The invention further discloses a manufacturing method of the brazing composite aluminum plate strip for the heat exchanger. According to the brazing composite aluminum plate strip for the heat exchanger and the manufacturing method thereof, corrosion and erosion possibility caused by diffusion of a traditional composite aluminum product are effectively eliminated, and the corrosion resistance performance of the material is remarkably improved.

Description

technical field [0001] The invention relates to a composite aluminum strip and its manufacturing method, in particular to a brazing composite aluminum strip for heat exchangers and its manufacturing method. Background technique [0002] With the development of light weight and low cost in the automobile industry, aluminum heat exchangers have been widely used. Most automotive heat exchangers use composite brazed aluminum materials to prepare heat exchange main side plates and pipe fittings, and braze them in a high temperature environment of 600°C to form heat dissipation modules. This requires that the composite brazed aluminum sheet and strip used for heat exchangers have better brazing performance. Therefore, in order to ensure the brazing performance of the heat dissipation block, the traditional composite brazing aluminum material mainly uses the 4 series aluminum alloy with a lower melting point as the cladding layer, and the thickness percentage is 7-12%. The 3 seri...

Claims

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Application Information

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IPC IPC(8): C22C21/00C22C21/02C22F1/04C22F1/043B21C37/02B21B1/38
CPCB21B1/38B21B2001/383B21B2001/386B21C37/02C22C21/00C22C21/02C22F1/04C22F1/043
Inventor 张全成袁婷苏朔彭晓彤吴永新邹晓明陈业铨
Owner JIANGSU ALCHA ALUMINUM CO LTD
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