Fin aluminum foil for high-corrosion-resistance and low-potential heat exchanger and manufacturing method of fin aluminum foil

A technology of a heat exchanger and a manufacturing method, applied in the field of aluminum alloy foil rolling, to prevent adverse effects, avoid excessive spheroidization and coarsening, and burn defects, and refine crystal grains

Active Publication Date: 2021-04-06
JIANGSU DINGSHENG NEW MATERIAL JOINT STOCK CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Relevant foreign air-conditioning companies have developed drawn aluminum tube-aluminum fin expansion heat exchangers to replace copper tube-based products on the market, greatly reducing costs and improving market competitiveness, but how to develop and select aluminum fins? The matching aluminum alloy fins and aluminum foil material of the tube can meet the overall high corrosion resistance service life of the heat exchanger, and there is no relevant special report in the industry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] High corrosion resistance of the present invention, the manufacture method of finned aluminum foil for low potential heat exchanger, the steps are as follows:

[0023] (1) Melting, casting and rolling: by weight percentage Fe0.50%, Si0.2%, Cu0.03%, Mn0.01%, Mg0.004%, Zn1.1%, Ti0.045%, Zr0.02% , the balance is the ratio of Al as the basic component, the alloy raw material is prepared, the billet is smelted and cast-rolled to obtain a 7.0mm cast-rolled coil, the temperature of the casting-rolling front box is 696°C, and the length of the casting-rolling zone is 60mm;

[0024] (2) High-temperature uniform annealing: the annealing process adopts temperature measurement production, the furnace gas temperature is raised to 580°C at full speed for heat preservation, and when the metal temperature reaches 500°C, the converter gas temperature is kept at 510°C for 6 hours and cooled.

[0025] (3) Rough and medium rolling: after 5 passes to 0.48mm, the rough and medium rolling pas...

Embodiment 2

[0032] High corrosion resistance of the present invention, the manufacture method of finned aluminum foil for low potential heat exchanger, the steps are as follows:

[0033] (1) Melting, casting and rolling: by weight percentage Fe0.40%, Si0.12%, Cu0.01%, Mn0.004%, Mg0.003%, Zn0.8%, Ti0.025%, Zr0.01% , the balance is the ratio of Al as the basic component, the alloy raw material is prepared, and the billet is smelted and cast-rolled to obtain a 7.0mm cast-rolled coil.

[0034] (2) High-temperature homogenization annealing: the annealing process adopts temperature measurement production, the furnace gas temperature is raised to 580°C at full speed and kept warm, and when the metal temperature reaches 502°C, the converter gas temperature is kept at 515°C for 3 hours and cooled.

[0035](3) Rough and medium rolling: after 5 passes to 0.48mm, the rough and medium rolling passes are 7.0→3.9→2.1→1.3→0.75→0.48mm;

[0036] (4) Longitudinal shearing edge: Clean and wipe each guide ro...

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Abstract

The invention belongs to the field of aluminum alloy foil rolling, and discloses a fin aluminum foil for a high-corrosion-resistance and low-potential heat exchanger and a manufacturing method of the fin aluminum foil. The aluminum foil comprises the following components by mass percentage: 0.40-0.50% of Fe, 0.12-0.20% of Si, less than or equal to 0.03% of Cu, less than or equal to 0.01% of Mn, less than or equal to 0.005% of Mg, 0.8-1.1% of Zn, 0.025-0.05% of Ti , less than or equal to 0.03% of Zr, and the balance of aluminum. The full-process technology for producing the high-Zn heat exchanger fin aluminum foil through the continuous cast rolling and cold rolling method, a produced novel aluminum fin is used in cooperation with a drawing internal thread aluminum round pipe and can serve as an anode sacrificial material to protect an air conditioner heat exchanger aluminum alloy pipe, and the service corrosion penetration life of the air conditioner heat exchanger drawing aluminum pipe is prolonged; and therefore, a heat exchanger of an air conditioner outdoor unit can be fully aluminized and is possible to be high in corrosion resistance and long in service life.

Description

technical field [0001] The invention relates to the processing technology of deformed aluminum alloy materials, in particular to a high-corrosion-resistant, low-potential heat exchanger finned aluminum foil and a manufacturing method thereof, belonging to the field of aluminum alloy foil rolling. Background technique [0002] Safety, energy saving, and environmental protection are the development directions of the air-conditioning equipment industry. Traditional air conditioner external unit radiators are mainly composed of copper tube-copper fins or copper tube-aluminum fins. Due to the sharp rise in copper prices, the cost of using copper has increased. At present, many researchers at home and abroad have carried out a large number of experimental studies on the work of substituting aluminum for copper, and have achieved remarkable results. Aluminum and aluminum alloys have a series of excellent properties. They not only have light specific gravity, high specific strength...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C37/02C22C21/10C22C1/02C22F1/053C21D1/26C21D9/46
CPCB21C37/02C22C21/10C22C1/026C22F1/053C21D1/26C21D9/46
Inventor 田国建陈魏新刘前换胡江华史明飞朱源沁
Owner JIANGSU DINGSHENG NEW MATERIAL JOINT STOCK CO LTD
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