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A brazing flat tube composite aluminum strip for high-frequency welding and its manufacturing method

A technology of high-frequency welding and manufacturing methods, which is applied in the field of aluminum foil calendering manufacturing, can solve problems such as uneven compounding rate, long production process, and large investment in equipment, and achieve the effects of short process flow, high production efficiency, and low investment

Active Publication Date: 2022-05-24
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

[0003] The object of the present invention is to provide a brazed flat tube composite aluminum strip for high-frequency welding and its manufacturing method to solve the problems of large equipment investment, long production process, high energy consumption, low yield rate, and compounding rate in traditional manufacturing methods. Inhomogeneity and other defects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041]A manufacturing method of a brazed flat tube composite aluminum strip for high-frequency welding, comprising the following steps:

[0042] 1. According to the mass percentage of Si 0.12%, Fe 0.41%, Cu 0.08%, Mn 1.1%, Ti 0.03%, and the balance of Al as the basic component, prepare alloy raw materials for intermediate layer billet smelting, casting and rolling to obtain 7.5mm Cast-rolled coil, i.e. alloy "3003";

[0043] According to the mass percentage of Si 7.6%, Fe 0.20%, Ti 0.02%, and the balance of Al as the basic component, the alloy raw materials are prepared, and the composite layer billet is smelted, cast and rolled to obtain a 6.8mm cast-rolled coil, namely alloy "4343";

[0044] According to the mass percentage of Fe+Si: 0.55%, Zn 1.1%, Ti 0.03%, and the balance of Al as the basic component, the alloy raw materials are prepared and the water-contact layer billet is smelted, cast and rolled to obtain a 6.9mm cast-rolled coil, that is, the alloy " 7072";

[0045...

Embodiment 2

[0061] 1. According to the mass percentage of Si 0.10%, Fe 0.60%, Cu 0.05%, Mn 1.2%, Ti 0.02%, Zn 0.1%, the balance is Al as the basic component, prepare alloy raw materials for intermediate layer billet melting and casting. Rolled to obtain 7.5mm cast-rolled coil, namely alloy "3003";

[0062] According to the mass percentage of Si 6.8%, Fe 0.25%, Cu 0.05%, Mn 0.05%, Ti 0.05%, and the balance of Al as the basic component, the alloy raw materials are prepared for composite layer billet melting, casting and rolling to obtain 6.8mm casting and rolling roll, i.e. alloy "4343";

[0063] According to the mass percentage of Cu 0.10%, Mn 0.10%, Zn 1.3%, Ti 0.02%, and the balance of Al as the basic component, the alloy raw materials are prepared and the water-contact layer billet is smelted and rolled to obtain a 6.9mm cast-rolled coil, that is, an alloy. "7072";

[0064] Other steps are the same as in Example 1.

Embodiment 3

[0066] 1. According to the mass percentage of Si 0.30%, Fe 0.30%, Cu 0.25%, Mn 1.0%, Zn 0.05%, and the balance is the ratio of Al as the basic component, prepare alloy raw materials for intermediate layer billet smelting, casting and rolling to obtain 7.5mm Cast-rolled coil, i.e. alloy "3003";

[0067] According to the mass percentage of Si 8.2%, Fe 0.05%, Cu 0.10%, Mn 0.10%, and the balance of Al as the basic component, the alloy raw materials are prepared for composite layer billet smelting, casting and rolling to obtain 6.8mm cast-rolled coils, that is, alloys "4343";

[0068] According to the mass percentage of Fe+Si 0.70%, Cu 0.05%, Mn 0.05%, Zn 0.80%, and the balance of Al as the basic component, the alloy raw materials are prepared and the water-contact layer billet is smelted and rolled to obtain a 6.9mm cast-rolled coil. That is alloy "7072";

[0069] Other steps are the same as in Example 1.

[0070] The properties of the finished brazed flat tube composite alumin...

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Abstract

The invention provides a brazed flat tube composite aluminum strip for high-frequency welding, which includes an intermediate layer and a brazing layer and a water-contacting layer respectively compounded on the upper and lower surfaces of the intermediate layer. The brazing layer, the intermediate layer, and the water-contacting layer are cast It is prepared by rolling + cold rolling production method, and the three layers of metal are tightly combined through cold rolling and compounding. The invention also discloses a method for manufacturing the brazed flat tube composite aluminum strip for high-frequency welding. The process flow includes smelting, casting and rolling, rough rolling, homogenizing annealing, cold rolling and compounding, diffusion annealing, rough rolling and trimming, Finish rolling, surface cleaning, annealing before finished products, finish rolling, surface cleaning + plate straightening, slitting inspection and packaging and other steps. Compared with the materials produced by the traditional hot rolling method, the present invention has the same indicators as the strength before and after brazing, the quality of solder joints, the pressure bearing performance after welding, and the corrosion resistance, but the process flow is short, the energy consumption is low, and the production efficiency is high. The composite rate in the width direction is uniform, the finished product rate is high, the investment capital is small, and the risk is low.

Description

technical field [0001] The invention relates to a brazing flat tube composite aluminum strip for high-frequency welding and a manufacturing method thereof, belonging to the technical field of aluminum foil rolling and manufacturing. Background technique [0002] Composite aluminum strips are widely used in water tanks, heaters, condensers, etc. heat exchanger. The traditional manufacturing method adopts smelting-casting-saw cutting-milling-homogenization annealing-heating-hot rolling-compound pairing-hot rolling compounding and subsequent processing methods. This method has the advantages of large equipment investment, long production process, high energy consumption, Disadvantages such as low yield and uneven compounding rate. SUMMARY OF THE INVENTION [0003] The object of the present invention is to provide a brazed flat tube composite aluminum strip for high-frequency welding and a manufacturing method thereof, so as to solve the problems of large equipment investmen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21C37/02B21B1/22C22C21/00C22C21/02C22C21/10C22F1/02C22F1/04C22F1/043C22F1/053
CPCB21C37/02B21B1/22C22C21/00C22C21/02C22C21/10C22F1/04C22F1/043C22F1/053C22F1/02B21B2001/221
Inventor 刘前换董则防田国建史明飞胡刘飞吴保剑
Owner JIANGSU DINGSHENG NEW MATERIAL JOINT STOCK CO LTD
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