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Method for brazing foamed aluminum plate and aluminum plate by removing interfacial oxide films through bubble wall friction

A foamed aluminum plate and oxide film technology, which is used in welding equipment, welding/welding/cutting items, manufacturing tools, etc., can solve the problems of low joint strength of foamed aluminum and aluminum plate, difficult to remove oxide film, and non-wetting of solder. Achieve improved wetting and spreading, short welding cycle times and low cost

Inactive Publication Date: 2012-07-18
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of low joint strength between foamed aluminum and aluminum plate due to the non-wetting of brazing material and difficult removal of oxide film in the existing method of direct brazing for the composite of foamed aluminum and aluminum plate. Method for removing interface oxide film by wall friction and brazing aluminum foam and aluminum plate

Method used

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  • Method for brazing foamed aluminum plate and aluminum plate by removing interfacial oxide films through bubble wall friction
  • Method for brazing foamed aluminum plate and aluminum plate by removing interfacial oxide films through bubble wall friction
  • Method for brazing foamed aluminum plate and aluminum plate by removing interfacial oxide films through bubble wall friction

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specific Embodiment approach 1

[0014] Specific implementation mode one: combine Figure 1 to Figure 5 Describe this implementation mode, this implementation mode is realized through the following steps:

[0015] Step 1, cleaning and drying the foamed aluminum plate 2 and the dense aluminum plate 3;

[0016] Step 2: Heat the aluminum foam board 2 as a whole to above the melting point of the brazing material, that is, between 350°C and 460°C, and use the rod-shaped Zn-Al-Cu brazing filler metal to reciprocate on the surface to be welded of the aluminum foam board 2, see figure 1 , so that the melted brazing material is evenly coated on the surface of the foamed aluminum plate 2 to be welded, see figure 2 , naturally cooled to room temperature (20 ° C ~ 25 ° C);

[0017] Step 3: Fix the weldment of the dense aluminum plate 3 on the fixing jig 6, fix the weldment of the foamed aluminum plate 2 coated with brazing material on the sliding jig 5, and coat the end surface of the foamed aluminum plate 2 with braz...

specific Embodiment approach 2

[0020] Embodiment 2: The heating temperature in step 1 of this embodiment is 400°C-430°C. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0021] Embodiment 3: In step 2 of this embodiment, the way of heating the aluminum foam board 2 as a whole adopts a propane flame or an oxyacetylene flame. Other steps are the same as in the first embodiment.

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Abstract

A method for brazing a foamed aluminum plate and an aluminum plate by removing interfacial oxide films through bubble wall friction relates to a welding method in the field of brazing, and solves the problem that an existing foamed aluminum plate and an existing aluminum plate are low in joint strength as the existing foamed aluminum plate and the existing aluminum plate are directly brazed, brazing filler metal is non-wetted and oxide films are difficult to remove. The method includes the steps: firstly, cleaning and drying the foamed aluminum plate and the compact aluminum plate; secondly, heating the foamed aluminum plate, sliding rod-like brazing filler metal on a surface to be welded of the foamed aluminum plate in a reciprocating manner, and coating the brazing filler metal on the surface of the foamed aluminum plate to be welded; thirdly, butting end surfaces to be welded of the foamed aluminum plate and the compact aluminum plate, and heating butt joint surfaces to melt the brazing filler metal on the butt joint surfaces; fourthly, sliding the foamed aluminum plate on an interface to be welded in a reciprocating manner for 5-15 times, and exerting pressure in a direction perpendicular to the surface to be welded; and fifthly, stopping sliding friction, exerting pressure again, cooling the plates after heat preservation, and connecting brazing interfaces of the foamed aluminum plate and the compact aluminum plate. The method is used for welding the foamed aluminum plate and the aluminum plate.

Description

technical field [0001] The invention relates to a welding method in the field of brazing, in particular to a method for brazing foamed aluminum and an aluminum plate by removing an oxide film by friction on the convex-concave surface of the foamed aluminum. Background technique [0002] Aluminum foam is an ultra-light metal material similar to foam, and it is a new type of material that integrates multiple properties. Due to its special porous structure, its density is only 0.1 to 0.5 times that of metal aluminum, but its specific bending stiffness can reach 1.5 times that of steel, and its damping performance can reach 5 to 10 times that of metal aluminum. In addition, aluminum foam also has good acoustic performance, excellent electromagnetic shielding performance and excellent thermal performance. Therefore, aluminum foam is of great significance in high-tech and high-tech fields such as transportation, microelectronics, marine oil recovery, aerospace, biology, medical t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K1/19B23K103/10
Inventor 黄永宪龚靖吕世雄刘华杰
Owner HARBIN INST OF TECH
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