Method for manufacturing composite aluminum foil for car heat exchanger

A heat exchanger and composite aluminum foil technology, which is applied in the directions of manufacturing tools, metal rolling, metal rolling, etc., can solve the problems of poor structure, poor collapse resistance and low composite strength of composite foil, and achieve brazing strength and The effect of improving the anti-collapse ability, improving the tensile strength and anti-collapse ability, and improving the intrinsic tissue properties

Active Publication Date: 2009-12-30
JIANGSU ALCHA ALUMINUM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. Purpose of the invention: the purpose of the present invention is to address the shortcomings of the existing composite aluminum foil manufacturing process, and propose a method for manufacturing composite aluminum foil for automotive heat exchangers, which solves the poor structure and low tensile strength of the existing composite foil , low composite strength, and poor collapse resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: the manufacture method of composite aluminum foil for automobile heat exchanger is:

[0027] 1) Add the raw materials for the core layer of composite aluminum foil prepared according to the 3003 or 3003+Zn grade and the raw materials for the upper and lower cladding layers of the composite aluminum foil prepared according to the grade 4004 or 4343, respectively, into the melting furnace, at 740 ° C After melting, refining, deslagging and stirring at a certain temperature, the formed aluminum liquid is put into a standing furnace. In order to ensure the quality of the melt, powder spraying refining equipment is used in the smelting process to pass the overload gas N 2 Spray Si into aluminum melt in the form of crystalline silicon powder, the particle size of silicon powder is controlled at 1 mm, and the purity is 99%. Quickly analyze Li, Na, Ca content in front of the furnace, and control them at 4.9×10 -5 %the following. While Mn is added to the melt in...

Embodiment 2

[0039] 1) Add the raw materials for the core layer of composite aluminum foil prepared according to the 3003 or 3003+Zn grade and the raw materials for the upper and lower cladding layers of the composite aluminum foil prepared according to the grade 4004 or 4343, respectively, into the melting furnace, at 745 ° C After melting, refining, deslagging and stirring at a certain temperature, the formed aluminum liquid is put into a standing furnace. In order to ensure the quality of the melt, powder spraying refining equipment is used in the smelting process to pass the overload gas N 2 Si is sprayed into the aluminum melt in the form of crystalline silicon powder, the particle size of the silicon powder is controlled at 1mm, and the purity is 99.2%. Quickly analyze Li, Na, Ca content in front of the furnace, and control them at 4.9×10 -5 %the following. While Mn is added to the melt in the form of additives, Zn is added in the form of zinc ingots to ensure uniform composition. ...

Embodiment 3

[0051] 1) Add the raw materials for the core layer of composite aluminum foil prepared according to the 3003 or 3003+Zn grade and the raw materials for the upper and lower cladding layers of the composite aluminum foil prepared according to the grade 4004 or 4343, respectively, into the melting furnace, at 745 ° C After melting, refining, deslagging and stirring at a certain temperature, the formed aluminum liquid is put into a standing furnace. In order to ensure the quality of the melt, powder spraying refining equipment is used in the smelting process to pass the overload gas N 2 Si is sprayed into the aluminum melt in the form of crystalline silicon powder, the particle size of silicon powder is controlled at 1mm, and the purity is 99.5%. Quickly analyze Li, Na, Ca content in front of the furnace, and control them at 4.9×10 -5 %the following. While Mn is added to the melt in the form of additives, Zn is added in the form of zinc ingots to ensure uniform composition.

[...

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Abstract

The invention discloses a metal material processing technology, in particular to a manufacturing method used for manufacturing an aluminum-alloy compound foil. The method includes the following steps: the aluminum liquid is cast into an ingot through melting, smelting, sediment-removing and stirring; the ingot is heated and rolled into an aluminum-ally plate; the aluminum-alloy plates of an upper and a lower claddings are washed and then are covered onto an upper surface and a lower surface of a cast plate of a core layer, then the alloy plates are welded into a whole; the welded alloy plates are heated and hot rolled into a blank, and the hot rolled blank is rolled into a foil material through a cold rolling mill; in the end the foil material is put into an annealing furnace for a medium annealing; after taken from the annealing furnace, the foil material is rolled, drawn and cut fine so as to make into the compound foil used for an automobile heat exchanger. The invention has the advantages that a microstructure of the compound foil and the distribution form and structure of a second-phase particle are enhanced so as to raise the structural capability of the compound foil; the optimized welding, hot rolling, cold rolling and medium annealing techniques lead to equal structure and conformed thickness and size of the claddings.

Description

technical field [0001] The invention relates to a metal material processing technology, in particular to a manufacturing method for producing aluminum alloy composite foil. Background technique [0002] Composite aluminum foil has the advantages of light weight, corrosion resistance, good brazability, and reliable performance. It has been widely used in automotive heat exchangers, such as automotive radiators, automotive air-conditioning condensers, and evaporators. In the 1980s, due to the development of vacuum brazing technology, 50% of the cars produced in the United States were equipped with vacuum brazed aluminum foil heat exchangers. more than 90 percent. In recent years, domestic automobiles have developed rapidly. At present, the annual output of automobiles has reached 3 million, and the number of automobiles in society has exceeded 20 million. However, at present, most of the heat exchanger materials in domestic automobiles are traditional copper foil, which not ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P17/00B21B1/40B21B37/16C22B21/00C22F1/04
Inventor 张平张敏达朱俊明张建军章建华吴永新
Owner JIANGSU ALCHA ALUMINUM CO LTD
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