Brazed flat pipe composite aluminum strip for high-frequency welding, and manufacturing method of brazed flat pipe composite aluminum strip

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: 2020-07-17
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 method for manufacturing a brazing 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 is Al as the basic composition, the alloy raw materials are prepared for intermediate layer billet melting, casting and rolling to obtain 7.5mm Cast and rolled coils, namely alloy "3003";

[0043] According to the mass percentage of Si 7.6%, Fe 0.20%, Ti 0.02%, and the balance is Al as the basic composition, the alloy raw material is prepared for composite layer billet smelting, casting and rolling to obtain a 6.8mm cast rolling coil, that is, the alloy "4343";

[0044] According to the mass percentage of Fe+Si: 0.55%, Zn 1.1%, Ti 0.03%, and the balance is Al as the basic composition, the alloy raw material is prepared for smelting and casting of the water-contact layer billet to obtain a 6.9mm cast-rolled coil, that is, the alloy...

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%, and the balance is Al as the basic composition, the alloy raw materials are prepared for intermediate layer blank smelting and casting Rolled to obtain 7.5mm cast-rolled coil, that is, 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 is Al as the basic composition, the alloy raw material is prepared for composite layer billet smelting, casting and rolling to obtain 6.8mm casting and rolling Coil, namely alloy "4343";

[0063] According to the mass percentage of Cu 0.10%, Mn 0.10%, Zn 1.3%, Ti 0.02%, and the balance is Al as the basic composition, the alloy raw material is prepared for smelting and casting of the water-contact layer billet to obtain a 6.9mm cast-rolled coil, that is, the alloy "7072";

[0064] Other steps are with embodiment 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 Al as the basic composition, the alloy raw materials are prepared for intermediate layer billet melting, casting and rolling to obtain 7.5mm Cast and rolled coils, namely alloy "3003";

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

[0068] According to the mass percentage of Fe + Si 0.70%, Cu 0.05%, Mn 0.05%, Zn 0.80%, the balance is Al as the basic composition, the alloy raw material is prepared for smelting and casting of the water-contact layer billet to obtain a 6.9mm cast-rolled coil, Namely alloy "7072";

[0069] Other steps are with embodiment 1.

[0070] The finished product brazing flat tube composite aluminum strip m...

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Abstract

The invention provides a brazed flat pipe composite aluminum strip for high-frequency welding. The brazed flat pipe composite aluminum strip comprises a middle layer, a brazing layer and a water contact layer, wherein the brazing layer and the water contact layer are respectively composited on an upper surface and a lower surface of the middle layer, the brazing layer, the middle layer and the water contact layer are prepared in a cast rolling and cold rolling production mode, and three layers of metal are tightly combined together through cold rolling compositing. The invention further discloses a manufacturing method of the brazed flat pipe composite aluminum strip for high-frequency welding. The technological process comprises the steps of smelting, cast rolling, rough rolling, homogenizing annealing, cold rolling compositing, diffusion annealing, rough rolling trimming, finish rolling, surface cleaning, finished product pre-annealing, finish rolling, surface cleaning and plate shape straightening, slitting inspection and packaging and the like. Compared with materials produced through a traditional hot rolling method, the strength before and after brazing, the welding spot quality, the pressure bearing performance after welding, the corrosion resistance and other indexes are equivalent, but the technological process is short, energy consumption is low, the production efficiency is high, the compositing rate of plate and strip materials in the width direction is uniform, the yield is high, the investment fund 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 calendering manufacturing. Background technique [0002] Composite aluminum strip is widely used in water tanks, heaters, condensers, etc. heat exchanger. The traditional manufacturing method adopts smelting-casting-sawing-milling-homogenizing annealing-heating-hot rolling-compound matching-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. Contents 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 its manufacturing method to solve the problems of large equipment investment, long production p...

Claims

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Application Information

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Patent Type & Authority Applications(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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