Preparation method of aluminum alloy brazing composite foil for automotive condenser fin

An aluminum alloy and condenser technology, which is applied in the field of preparation of aluminum alloy brazing composite foil for automobile condenser fins, can solve the problems of low strength and poor sag resistance, and achieves low heating temperature, increased strength, and reduced collapse. sexual effect

Active Publication Date: 2016-06-15
长沙众兴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

[0009] The purpose of the present invention is to provide a preparation method of aluminum alloy brazing composite foil for automotive condenser fins, which solves the problems of low strength and poor sagging resistance of the existing aluminum alloy brazing composite foil after brazing

Method used

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  • Preparation method of aluminum alloy brazing composite foil for automotive condenser fin
  • Preparation method of aluminum alloy brazing composite foil for automotive condenser fin
  • Preparation method of aluminum alloy brazing composite foil for automotive condenser fin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Step 1, preparation of core layer alloy:

[0057] Feeding is carried out according to the standard composition ratio of Al-Mn aluminum alloy with brand AA3003, and the Al-Mn aluminum alloy with brand AA3003 is fed according to the following mass percentage composition ratio: Si: 0.58%; Fe: 0.23%; Cu: 0.15% ; Mn: 1.37%; Mg: <0.05%; Zn: <0.05%; other single impurity elements <0.05%; the sum of other impurity elements <0.15%; the balance is Al;

[0058] The above-mentioned Al-Mn aluminum alloy was smelted at a temperature of 730° C. for the core layer alloy; during the smelting process, multi-stage degassing purification was used for degassing treatment, and a 30 ppi foam ceramic filter plate was used to filter the melt. During the melting process of the core alloy, no grain refiner is used. At a temperature of 690°C, the core alloy melt casting was carried out; after the core layer AA3003 alloy was smelted and cast into a block ingot, it was ready for use after face mill...

Embodiment 2

[0080] Step 1, preparation of core layer alloy:

[0081] The material is fed according to the standard composition ratio of the Al-Mn aluminum alloy with the brand AA3003, and the core layer alloy is smelted at a temperature of 780°C; during the smelting process, multi-stage degassing purification is used for degassing treatment, and a 30ppi foam ceramic filter plate is used for degassing. The melt is filtered. During the melting process of the core alloy, no grain refiner is used. At a temperature of 710°C, the core alloy melt casting was carried out; after the core layer AA3003 alloy was smelted and cast into a block ingot, it was ready for use after face milling and surface treatment; the chemical composition of the core layer AA3003 alloy was tested as shown in Table 1 shown.

[0082] Step 2, preparation of cladding layer alloy:

[0083] The material is fed according to the standard composition ratio of Al-Si aluminum alloy with the brand AA4343, and the cladding layer ...

Embodiment 3

[0098] Step 1, preparation of core layer alloy:

[0099] The material is fed according to the standard composition ratio of the Al-Mn aluminum alloy with the brand AA3003, and the core layer alloy is smelted at a temperature of 740°C; during the smelting process, multi-stage degassing purification is used for degassing treatment, and a 30ppi foam ceramic filter plate is used for degassing. The melt is filtered. During the melting process of the core alloy, no grain refiner is used. At a temperature of 700 °C, the core alloy melt casting was carried out; after the core layer AA3003 alloy was smelted and cast into a block ingot, it was ready for use after milling and surface treatment; the chemical composition of the core layer AA3003 alloy was tested as shown in Table 1 shown.

[0100] Step 2, preparation of cladding layer alloy:

[0101] The material is fed according to the standard composition ratio of Al-Si aluminum alloy with the brand AA4343, and the cladding layer allo...

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Abstract

The invention discloses a preparation method of aluminum alloy brazing composite foil for an automotive condenser fin and belongs to the technical field of aluminum alloy calendaring. The preparation method specifically comprises the steps of preparation of Al-Mn alloy of a core layer, preparation of Al-Si alloy of a brazing cladding layer, and composite rolling according to the Al-Si/Al-Mn/Al-Si combination. According to the preparation method, the low-temperature hot rolling technique is adopted, and no grain refiner is added, so that original grains of the core Al-Mn alloy of the composite foil are made large, and a large long-strip-shaped grain structure can be formed after rolling deformation; a high-angle grain boundary exists so that the number of medium channels through which main elements of the alloy of the brazing cladding layer diffuse and penetrate towards the core alloy after welding can be reduced, and accordingly mutual diffusion of alloy elements is reduced, the strength of the composite foil after brazing is improved, and the probability of collapse of materials is lowered. Meanwhile, the heating temperature of a cast ingot is low, the heating time is short, energy consumption is reduced, and good economic benefits and social benefits are achieved.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy calendering processing, and relates to a preparation method of an aluminum alloy brazing composite foil for automobile condenser fins. Background technique [0002] The aluminum alloy brazing composite foil for automobile condenser fins is usually a three-layer composite aluminum foil. The core material is an Al-Mn alloy matrix, which acts as a structural support. The metallurgical bonding of the composite interface is realized by the composite ingot through the rolling process. [0003] The typical production process of the existing aluminum alloy brazing composite foil for condenser fins is as follows: [0004] (1) Preparation of the core layer: After the ingots obtained by smelting, casting and refining treatment are subjected to homogenization heat treatment, head and tail cutting, face milling, surface treatment and other processes, the core material alloy is obtained; [0005] (2) P...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00B23P15/26
CPCB23P15/00B23P15/26B23P2700/50
Inventor 彭卓玮
Owner 长沙众兴新材料科技有限公司
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