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A kind of brazing composite aluminum strip for heat exchanger and its manufacturing method

A technology of a heat exchanger and a manufacturing method, applied in metal rolling and other directions, can solve problems such as low corrosion resistance, and achieve the effects of ensuring brazing performance, easy realization, and reducing flow distance

Active Publication Date: 2021-09-28
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 brazed composite aluminum strip for heat exchangers, which consists of a first cladding layer, a core layer and a second cladding layer stacked in sequence, the first cladding layer and the second cladding layer It is a 3-series aluminum alloy, the core layer is a 4-series aluminum alloy, and the core layer accounts for 3-20% of the total thickness of the brazed composite aluminum sheet and strip for heat exchangers, and the composition of the 3-series aluminum alloy is by weight percentage It is: 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 rest is aluminum. The composition of the 4-series aluminum alloy is: silicon 8.0‑11.0%, iron≤0.25%, copper≤0.05%, manganese≤0.05%, titanium≤0.1%, and the rest is aluminum. The invention also discloses a manufacturing method of the brazing composite aluminum sheet and strip used for the heat exchanger. The invention effectively eliminates the possibility of corrosion and erosion caused by diffusion of traditional composite aluminum materials, and significantly improves the corrosion resistance of the material.

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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Patent Type & Authority Patents(China)
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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