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Method of welding foamed aluminium and alloy

A welding method and foamed aluminum technology, applied in welding equipment, metal processing equipment, manufacturing tools, etc., can solve problems such as low material strength, unformable weld seam, difficulty in welding foamed aluminum, etc., achieve uniform heating, small deformation, The effect of simple method

Inactive Publication Date: 2008-07-09
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The welding quality of the existing welding technology is very sensitive to the existence of pores in the material. Due to the special porous structure of foamed aluminum, the weld cannot be formed, and the material strength is low. Therefore, traditional fusion welding and pressure welding are used to weld foamed aluminum. very difficult

Method used

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  • Method of welding foamed aluminium and alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: Welding of a kind of foamed aluminum alloy

[0018] The first step is to select the foamed aluminum alloy to be welded, the finish is basically flat, select the joint surface to be welded, and remove the oxide skin on the surface of the foamed aluminum alloy by grinding, without using chemical methods to clean it.

[0019] The second step is to use the positioning iron sheets to properly position and properly cover the foamed aluminum alloy, and spot weld the positioning iron sheets together to form a component covered with the foamed aluminum alloy.

[0020] The third step is to heat the above parts to 300° C. for 10 minutes for preheating, so as to prevent the uneven porosity caused by the low solid phase ratio during the welding process.

[0021] The fourth step is to put the foamed aluminum and alloy parts covered with iron sheets into the heating furnace, pass through the argon protection, and quickly raise the temperature to 650 ° C and keep it for 5...

Embodiment 2

[0023] Embodiment 2: Embodiment 1: Welding of a kind of foamed aluminum alloy

[0024] The first step is to select the foamed aluminum alloy to be welded, the finish is basically flat, select the joint surface to be welded, and remove the oxide skin on the surface of the foamed aluminum alloy by grinding, without using chemical methods to clean it.

[0025] The second step is to use the positioning iron sheets to properly position and properly cover the foamed aluminum alloy, and spot weld the positioning iron sheets together to form a component covered with the foamed aluminum alloy.

[0026] The third step is to heat the above parts to 650°C for 50 minutes for preheating, so as to prevent the uneven porosity caused by the low solid phase ratio during the welding process.

[0027] The fourth step is to put the foamed aluminum and alloy parts covered with iron sheets into the heating furnace, pass through the argon protection, and quickly raise the temperature to 1200 ° C and ...

Embodiment 3

[0029] Embodiment 3: Welding of a kind of foamed aluminum alloy

[0030] The first step is to select the foamed aluminum alloy to be welded, the finish is basically flat, select the joint surface to be welded, and remove the oxide skin on the surface of the foamed aluminum alloy by grinding, without using chemical methods to clean it.

[0031] The second step is to use the positioning iron sheets to properly position and properly cover the foamed aluminum alloy, and spot weld the positioning iron sheets together to form a component covered with the foamed aluminum alloy.

[0032] The third step is to heat the above parts to 400°C for 25 minutes for preheating, so as to prevent the uneven porosity caused by the low solid phase ratio during the welding process.

[0033] The fourth step is to put the foamed aluminum and alloy parts covered with iron sheets into the heating furnace, pass through the argon gas protection, and quickly raise the temperature to 1000 ° C and keep it fo...

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Abstract

A welding method for foamed aluminum and alloy is characterized in that the welding steps include: coating processing, preheating processing, secondary foaming behavior and cooling processing. The invention needs not to use any brazing filler metal on the welded foamed aluminum and alloy; thereby the method is simple and easy to carry out, the processing cost is low and the invention can acquire welded foamed aluminum and alloy material with oversize, high combining degree as well as excellent processing performances and mechanical property. The invention needs not to carry out fine processing on a welding interface of the foamed aluminum and alloy and only needs to remove an oxide layer, can reduce cost, simplify the working procedures. Through using a locating iron sheet to coat the foamed aluminum and alloy and lead a small amount of deformation and higher precision during the welding process. The welding combining rate can reach 95 percent. The invention relates to the joint among metals and has no aging problem under the space ray conditions like ultraviolet radiation and has a reliable connection compared with splicing.

Description

1. Technical field [0001] The invention belongs to the field of welding technology, in particular to a welding method for aluminum foam and alloys. 2. Background technology [0002] Existing technology: The ultra-light metal structure focusing on closed-cell foam aluminum and alloys, due to the special pore structure, realizes light weight and multi-functional structural materials, thus becoming a hot spot in aerospace and high technology. Due to the needs of civil and high-tech fields such as automobiles, foamed aluminum and alloy special-shaped parts, sandwich structures, and oversized foamed aluminum and alloys are becoming the forefront of the field of foamed aluminum preparation. The welding quality of the existing welding technology is very sensitive to the existence of pores in the material. Due to the special porous structure of foamed aluminum, the weld cannot be formed, and the material strength is low. Therefore, traditional fusion welding and pressure welding are...

Claims

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Application Information

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IPC IPC(8): B23K28/00
Inventor 何德坪褚旭明何思渊王辉戴戈
Owner SOUTHEAST UNIV
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