Method for welding foamed aluminum material by transient liquid phase diffusion

A diffusion welding and instantaneous liquid phase technology, which is applied in welding equipment, non-electric welding equipment, metal processing equipment, etc., can solve the problem of unfavorable interface layer component diffusion and uniform solidification, material Strength and plastic failure and other issues to achieve the effect of avoiding adverse effects, low cost, and avoiding residual stress

Active Publication Date: 2011-01-26
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

How Deping and others used high-temperature secondary foaming technology to connect aluminum foam, but the application of this technology was limited due to the great influence of the porosity of the connection interface on welding
[0006] The above two methods have their own defects. The first method is too short for holding time, which is not conducive to the diffusion and uniform solidification of the interface layer components; the second method will cause great damage to the strength and plasticity of the material itself when the aluminum foam matrix is ​​heated to high temperature.
But so far, there is no literature about the instantaneous liquid phase diffusion welding technology of foamed aluminum.

Method used

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  • Method for welding foamed aluminum material by transient liquid phase diffusion
  • Method for welding foamed aluminum material by transient liquid phase diffusion
  • Method for welding foamed aluminum material by transient liquid phase diffusion

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Experimental program
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Effect test

Embodiment 1

[0027] Embodiment 1: The instant liquid phase diffusion welding connection method of the foamed aluminum material of the present invention is:

[0028] The intermediate layer foil is aluminum alloy Al4004, and its composition by weight percentage is: Al: 86-88.5%, Si: 9.0-10.5%, Mg: 1.0-2.0%, Cu: 0.50-1.3%, Fe: 0.8%, and its thickness is 50 μm. The composition of foamed aluminum is: Al: 87.5%, Si: 12.5%;

[0029] (1) Perform rust and oil removal treatment on the surface of the aluminum foam to be connected, soak it with 10% volume fraction of NaOH solution for 1 minute to remove oxides and impurities, then soak it with 10% volume fraction of HCl solution for 1 minute to neutralize it, and use sandpaper Grind the welding interface of the aluminum foam to be connected and the Al4004 foil (commercial product) of the intermediate layer material, place the treated aluminum foam and Al4004 foil in an ultrasonic instrument to shake for 30 minutes to remove impurities, and finally pl...

Embodiment 2

[0034] Embodiment 2: The instant liquid phase diffusion welding connection method of the foamed aluminum material of the present invention is:

[0035] The intermediate layer foil is aluminum alloy Al4004, and its composition by weight percentage is: Al: 86-88.5%, Si: 9.0-10.5%, Mg: 1.0-2.0%, Cu: 0.50-1.3%, Fe: 0.8%, and its thickness is 50 μm. The composition of foamed aluminum is: Al: 87.5%, Si: 12.5%;

[0036] (1) Perform rust and oil removal treatment on the surface of the aluminum foam to be connected, soak it with 10% volume fraction of NaOH solution for 1 minute to remove oxides and impurities, then soak it with 10% volume fraction of HCl solution for 1 minute to neutralize it, and use sandpaper Grind the welding interface of the aluminum foam to be connected and the Al4004 foil (commercial product) of the intermediate layer material, place the treated aluminum foam and Al4004 foil in an ultrasonic instrument to shake for 30 minutes to remove impurities, and finally pl...

Embodiment 3

[0041] Embodiment 3: The instant liquid phase diffusion welding connection method of the foamed aluminum material of the present invention is:

[0042]The intermediate layer foil is aluminum alloy Al4004, and its composition by weight percentage is: Al: 86-88.5%, Si: 9.0-10.5%, Mg: 1.0-2.0%, Cu: 0.50-1.3%, Fe: 0.8%, and its thickness is 50 μm. The composition of foamed aluminum is: Al: 87.5%, Si: 12.5%;

[0043] (1) Perform rust and oil removal treatment on the surface of the aluminum foam to be connected, soak it with 10% volume fraction of NaOH solution for 1 minute to remove oxides and impurities, then soak it with 10% volume fraction of HCl solution for 1 minute to neutralize it, and use sandpaper Grind the welding interface of the aluminum foam to be connected and the Al4004 foil (commercial product) of the intermediate layer material, place the treated aluminum foam and Al4004 foil in an ultrasonic instrument to shake for 30 minutes to remove impurities, and finally pla...

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Abstract

The invention relates to a method for welding a foamed aluminum material. The method comprises the following steps of: performing rust removing and deoiling on the foamed aluminum material, then polishing a weld interface of the foamed aluminum and an AL4004 foil to expose a fresh metal, removing impurities by using an ultrasonic apparatus, and then drying; placing the AL4004 foil between the connected interfaces of the two foamed aluminum materials, and then clamping the two foamed aluminum materials and the AL4004 foil by using a fixing clamp, wherein the clamping pressure is 10MPa; putting a connecting piece in a structure of the upper foamed aluminum, the middle AL4004 foil and the lower foamed aluminum into a heating furnace without vacuum environment and gas protective atmosphere for heating, preserving the heat at the temperature of between 580 and 700 DEG C for 20 to 90 minutes; and then performing furnace cooling on the connecting piece for 20 to 180 minutes, reducing the temperature to 220 to 560 DEG C, taking the connecting piece out for air cooling, and then removing the clamp to obtain the foamed aluminum structural component with high connection performance. The foamed aluminum material has the advantages of uniform tissue of the weld interface, sharing strength of 8 to 10MPa, high heat resistance, small heat affected zone of the weld interface, no residual stress and the like; and the method has the advantage of simple process and low cost.

Description

technical field [0001] The invention belongs to the technical field of welding, and in particular relates to a welding method of foamed aluminum material. Background technique [0002] As a new type of functional material, closed-cell aluminum foam has broad application prospects due to its unique structure and properties. Due to the high porosity, large specific surface area and low density of aluminum foam, it has the characteristics of sound absorption, heat insulation, shock absorption, energy absorption such as shielding electromagnetic waves, etc. It can be used to make structurally stable components with low weight, high hardness and bending resistance. ; Good cushioning performance, can be used for car bumpers, front bodies, trunks and guardrails of highways, etc.; used for decorative materials, it can be flame retardant, and can also be used for filtration or ventilation, such as filtration of compressed air, various gases, aqueous solutions, Filtration of oils and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K20/16B23K20/233B23K20/24
Inventor 祖国胤姚广春李小兵关志昊宋滨娜丁明明仲照阳
Owner NORTHEASTERN UNIV
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