A kind of aluminum alloy diffusion welding method

A technology of diffusion welding and aluminum alloy, which is applied in welding equipment, non-electric welding equipment, metal processing equipment, etc., can solve the problems of large deformation, lower elastic modulus, and low melting point of aluminum alloy, and achieve good compatibility and improve compactness effect

Active Publication Date: 2021-04-02
东莞市发奕林精密机电设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the diffusion bonding of aluminum alloy often needs to be carried out between 400°C and 600°C, and the melting point of aluminum alloy is low, the elastic modulus decreases seriously at this temperature, and the aluminum alloy material softens at the same time, so the aluminum alloy material often produces a relatively low temperature. Large deformation, which limits the application of diffusion welding of aluminum alloys in aerospace, electronic industry and other sectors and fields that require strict precision

Method used

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  • A kind of aluminum alloy diffusion welding method

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Experimental program
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Effect test

Embodiment 1

[0060]The aluminum alloy diffusion welding method provided in this embodiment includes the following steps:

[0061]S1: Clean the surface of the aluminum alloy base material with acetone, remove oil;

[0062]S2: Wipe the surface of the aluminum alloy base material for the oil to remove the oil in the concentration of 5 wt.%, The wipe is 10 minutes;

[0063]S3: After the surface of the sodium hydroxide solution is wiped, the surface of the aluminum alloy base material is cleaned with anhydrous ethanol, and the excess base liquid is removed;

[0064]S4: Wipe the surface of the aluminum alloy base material after the concentration of 12 vol.%, The wipe time is 3 minutes, neutralized residual base, remove the reaction product and carry out light treatment;

[0065]S5: The surface of the aluminum alloy base material after water treatment is cleaned by anhydrous ethanol;

[0066]S6: The surface of the aluminum alloy base material to remove the except for the extent is blown away, and the peppercohol is appl...

Embodiment 2

[0074]The aluminum alloy diffusion welding method provided in this embodiment includes the following steps:

[0075]S1: Clean the surface of the aluminum alloy base material with acetone, remove oil;

[0076]S2: Wipe the surface of the aluminum alloy base material having a concentration of 6 wt.%, The wipe is 10 minutes;

[0077]S3: After the surface of the sodium hydroxide solution is wiped, the surface of the aluminum alloy base material is cleaned with anhydrous ethanol, and the excess base liquid is removed;

[0078]S4: Wipe the surface of the aluminum alloy base material after the concentration of 15 vol.%, The wipe is 3 minutes, the neutralization of the residual base, and the reaction product is removed and the light is removed;

[0079]S5: The surface of the aluminum alloy base material after water treatment is cleaned by anhydrous ethanol;

[0080]S6: The surface of the aluminum alloy base material to remove the except for the extent is blown away, and the peppercohol is applied to weld the ...

Embodiment 3

[0088]The aluminum alloy diffusion welding method provided in this embodiment includes the following steps:

[0089]S1: Clean the surface of the aluminum alloy base material with acetone, remove oil;

[0090]S2: Wipe the surface of the aluminum alloy base material having a concentration of 10 wt.%, The wipe is 10 minutes;

[0091]S3: After the surface of the sodium hydroxide solution is wiped, the surface of the aluminum alloy base material is cleaned with anhydrous ethanol, and the excess base liquid is removed;

[0092]S4: Wipe the surface of the aluminum alloy base material after the concentration of 20 vol.%, The wipe is 3 minutes, the neutralization time is 3 minutes, neutralized residual base, remove the reaction product and perform light treatment;

[0093]S5: The surface of the aluminum alloy base material after water treatment is cleaned by anhydrous ethanol;

[0094]S6: The surface of the aluminum alloy base material to remove the except for the extent is blown away, and the peppercohol is ...

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Abstract

The invention discloses an aluminum alloy diffusion welding method and relates to the technical field of diffusion welding. The aluminum alloy diffusion welding method comprises the steps that chromium is deposited on the surfaces of to-be-welded aluminum alloy base metal A in a magnetron sputtering manner so as to obtain to-be-welded aluminum alloy base metal B; copper is deposited on the surfaces of the to-be-welded aluminum alloy base metal B in a magnetron sputtering manner so as to obtain to-be-welded aluminum alloy base metal C; a tin-lead alloy is arranged between two pieces of the to-be-welded aluminum alloy base metal C, so that a to-be-welded component is obtained; and the to-be-welded component is arranged in a vacuum furnace, diffusion welding is performed, and a welding connecting component is obtained. According to the aluminum alloy diffusion welding method provided by the invention, copper layers are introduced to the surface layers of the aluminum alloy base metal in the magnetron sputtering manner, the copper and the intermediate layer tin-lead alloy foil are subjected to diffusion welding under a low temperature, and low-temperature and low-deformation aluminum alloy connection is achieved.

Description

Technical field[0001]The present invention relates to the field of diffusion welding technologies, and more particularly to an aluminum alloy diffusion welding method.Background technique[0002]Aluminum elements are rich in reserves in the earth, and due to low density, good thermal conductivity, there is a certain corrosion resistance and high ratio strength, aluminum alloy materials in aerospace, electronic fields, chemical oil and other industries after adding alloying elements. The field has a wide range of applications. Applying such a wide range of materials inevitably involves material connection, with the development of the industry, the precision requirements for material connection are getting higher. At present, the low-shaped convection connection of aluminum alloys is mainly carried out by brazing, but the holes produced during the solidification process have seriously influence the density of the joint.[0003]Diffusion welding is a dense connection means, which insulates...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K20/14C23C14/35
CPCB23K20/14C23C14/35
Inventor 林铁松白松义何鹏
Owner 东莞市发奕林精密机电设备有限公司
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