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Aluminum alloy composite tube pre-brazing layer material

A composite pipe and pre-brazing technology, applied in the field of deformed aluminum alloy materials, can solve the problems of insufficient sealing performance and insufficient fluidity, and achieve the effects of good welding performance, excellent welding fluidity, and reducing welding leakage.

Inactive Publication Date: 2011-04-27
JIANGSU ASIA PACIFIC LIGHT ALLOY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the pre-brazing layer material of aluminum alloy composite pipe is mainly 4343 or 4045 aluminum alloy grade. During the welding process, due to its insufficient fluidity, certain gaps are formed locally after welding, and the expected sealing performance cannot be achieved.

Method used

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  • Aluminum alloy composite tube pre-brazing layer material

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Embodiment Construction

[0014] Aluminum alloy composite pipe pre-brazed layer material, its chemical composition weight percentage is:

[0015] Silicon 8.6~11.5%;

[0016] Zinc 0.9~1.2%;

[0017] Iron 0.1~0.7%;

[0018] The rest is aluminum.

[0019] Its components can also be: 8.83-11.2% of silicon, 0.95-1.17% of zinc, 0.19-0.65% of iron, and the rest is aluminum.

[0020] Its components can further be: 10.2% of silicon, 1.01% of zinc, 0.41% of iron, and the rest is aluminum.

[0021] In the new alloy, prepare a composite aluminum tube A of a specification according to the upper limit of all components, prepare the same product B according to the lower limit of the components, and prepare the same specification products C, D, E, F, G, H, I, J, K, L, M, take 4343, 4045 alloy components are also extruded products of the same specification, their chemical composition weight percentage is:

[0022]

silicon

iron

zinc

aluminum

A

11.50

0.70

1.20

marg...

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Abstract

The invention discloses an aluminum alloy composite tube pre-brazing layer material which is characterized by comprising the following chemical components in percentage by weight: 8.6-11.5% of silicon, 0.9-1.2% of zinc, 0.1-0.7% of ferrum and the balance of aluminum; the material can also comprises the chemical components in following percentage by weight: 8.83-11.2% of solicon, 0.95-1.17% of zinc, 0.19-0.65% of ferrum and the balance of aluminum; and further, the material can also comprises the chemical components in following percentage by weight: 10.2% of silicon, 0.01% of zinc, 0.41% of ferrum and the balance of aluminum. A large amount of Si in the alloy can mainly exist in the form of alpha+Si eutectic in the alloy, the eutectic is increased when the content of Si is increased, the flowability of the alloy is increased, and Si plays the function of increasing welding flowability; a small amount of Zn plays the functions of improving the thermal stress of welding and reducing welding bubbles so as to increase welding performance; and FeAl3 formed from a trace amount of Fe can play good effect of refining recrystal grains so to as improve welding flowability.

Description

technical field [0001] The invention belongs to the field of deformed aluminum alloy materials. Background technique [0002] At present, the pre-brazing layer material of aluminum alloy composite pipe is mainly 4343 or 4045 aluminum alloy grade. During the welding process, due to its insufficient fluidity, certain gaps are formed locally after welding, and the expected sealing performance cannot be achieved. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a new pre-brazing material for aluminum alloy composite pipes with good weldability. [0004] Technical scheme of the present invention is: [0005] A kind of aluminum alloy composite tube pre-brazing material, its main feature is that the weight percentage of chemical composition is: [0006] Silicon 8.6~11.5%; [0007] Zinc 0.9~1.2%; [0008] Iron 0.1~0.7%; [0009] The rest is aluminum. [0010] Its components can also be: 8.83-11.2% of silicon, 0.95-1...

Claims

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Application Information

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IPC IPC(8): C22C21/02
Inventor 陈啸彭俊芳
Owner JIANGSU ASIA PACIFIC LIGHT ALLOY TECH CO LTD
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