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Self-brazing aluminum alloy foil and manufacturing method therefor

A technology of aluminum alloy foil and manufacturing method, which is applied in the direction of manufacturing tools, metal rolling, furnace types, etc., can solve the problems of high production cost, instability, poor performance, etc., to prolong life, improve production efficiency, and simplify production process. Effect

Active Publication Date: 2021-01-08
JIANGSU ALCHA ALUMINUM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, composite brazing aluminum foil is prepared by composite rolling of two or three different aluminum alloy materials, and its performance is often poor and unstable.
In addition, under the requirements of the modern automobile industry to further reduce weight and reduce costs, the top international automotive heat exchange system production companies continue to require that the limit thickness of aluminum sheet, strip and foil be continuously reduced, and the limit thickness of fins be gradually reduced to 0.05mm. Brings great challenges to the rolling of clad aluminum, resulting in higher production costs for the clad brazed aluminum foil process

Method used

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  • Self-brazing aluminum alloy foil and manufacturing method therefor
  • Self-brazing aluminum alloy foil and manufacturing method therefor
  • Self-brazing aluminum alloy foil and manufacturing method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A self-brazing aluminum alloy foil, the composition and mass percentage of the aluminum foil are: Fe: 0.25%; Si: 2.1%; Mn: 1.25%; Zn: 1.5%; Cu: 0.3%; Ti: 0.01 %; RE: 0.05%; Zr: 0.05%; the rest is Al. The preparation process comprises the following steps:

[0024] (1) Smelting and refining, the raw materials are added to the melting furnace for melting according to the weight percentage of each component, and continuous casting and rolling are carried out on the continuous casting and rolling machine. The casting and rolling temperature is 680°C, and the casting and rolling speed is 0.55m / min. The thickness of the cast-rolled plate is controlled to be 6.8mm. In order to control the quality of the cast-rolled plate and prevent defects such as sticking rolls and large cracks at the edge, the temperature of the front box when the plate is erected: 750°C, the length of the cast-rolled area: 47mm, the cooling water pressure: 0.3MPa, and wipe it with dry refractory cotton bef...

Embodiment 2

[0031] A self-brazing aluminum alloy foil, the composition and mass percentage of the aluminum foil are: Fe: 0.23%; Si: 2.2%; Mn: 1.30%; Zn: 1.4%; Cu: 0.35%; Ti: 0.015 %; RE: 0.03%; Zr: 0.05%; the rest is Al. The preparation process comprises the following steps:

[0032] (1) Smelting and refining, the raw materials are put into the melting furnace for smelting according to the weight percentage of each component, and continuous casting and rolling are carried out on the continuous casting and rolling machine. The casting and rolling temperature is 675°C, and the casting and rolling speed is 0.62m / min. The thickness of the cast-rolled plate is controlled to be 7.2mm. In order to control the quality of the cast-rolled plate and prevent defects such as sticking rolls and large cracks at the edge, the temperature of the front box when the plate is erected: 755°C, the length of the cast-rolled area: 48mm, the cooling water pressure: 0.4MPa, and wipe it with dry refractory cotton ...

Embodiment 3

[0039] A self-brazing aluminum alloy foil, the composition and mass percentage of the aluminum foil are: Fe: 0.33%; Si: 2.3%; Mn: 1.45%; Zn: 1.6%; Cu: 0.4%; Ti: 0.02 %; RE: 0.06%; Zr: 0.03%; the rest is Al. The preparation process comprises the following steps:

[0040](1) Smelting and refining, the raw materials are added to the melting furnace for melting according to the weight percentage of each component, and continuous casting and rolling are carried out on the continuous casting and rolling machine. The casting and rolling temperature is 680°C, and the casting and rolling speed is 0.77m / min. The thickness of the cast-rolled plate is controlled to be 6.7mm. In order to control the quality of the cast-rolled plate and prevent defects such as sticking rollers and large cracks at the edge, the temperature of the front box when the plate is erected: 758°C, the length of the cast-rolled area: 49mm, the cooling water pressure: 0.5MPa, and wipe with dry refractory cotton befor...

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Abstract

The invention discloses a self-brazing aluminum alloy foil, consisting of the following components in percentage by mass: 0.2-0.4% of Fe, 2.1-2.3% of Si, 1.25-1.45% of Mn, 1.4-1.6% of Zn, 0.3-0.4% ofCu, 0.01-0.02% of Ti, 0.03-0.07% of RE, 0.03-0.07% of Zr, and the balance of Al. The thickness of the self-brazing aluminum alloy foil is 0.05-0.10 mm. The invention further discloses a preparation method for the self-brazing aluminum alloy foil. The self-brazing aluminum alloy foil is a single-layer foil, can implement self-brazing, is high in tensile strength and yield strength after brazing, and is excellent in droop resistance.

Description

technical field [0001] The invention relates to an aluminum alloy foil and a manufacturing method thereof, in particular to a self-brazing aluminum alloy foil and a manufacturing method thereof. Background technique [0002] In recent years, with the continuous aggravation of the global energy crisis, the automobile industry has always focused on the development of lightweight materials. As an important part of the car, the radiator is gradually made of aluminum to achieve the dual purpose of reducing the weight of the car and reducing the cost. The fins in radiators are generally made of composite brazed aluminum foil. At present, most of the aluminum alloy composite foils produced in the world are double-sided coated with Al-Si alloy (skin material) on Al-Mn alloy (core material). . During brazing, the aluminum alloy composite foil is heated to about 600°C, and the Al-Si alloy with a lower melting point melts, and flows to the joint gap through capillary movement under t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22C1/02B22D11/00B21B1/22B21B3/00C21D8/02C22F1/043C21D1/26C21D9/46
CPCC22C21/02C22C1/026B22D11/003B21B1/22B21B3/00C21D8/0247C21D8/0221C22F1/043C21D1/26C21D9/46B21B2003/001
Inventor 张全成钱敏科吴永新陈惠新时坚
Owner JIANGSU ALCHA ALUMINUM CO LTD
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