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Aluminum alloy welding wire for aerospace and preparation method of aluminum alloy welding wire for aerospace

An aluminum alloy welding wire, aerospace technology, applied in the direction of metal material coating process, etc., can solve the problems of high hydrogen content and oxidized inclusion content, high oxidized inclusion content, plasticity decline of aluminum alloy, etc., to reduce surface tension and gloss. Corrosion resistance and crack reduction effect

Inactive Publication Date: 2016-07-20
GUILIN UNIV OF AEROSPACE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, compared with the imported welding wire, the aerospace aluminum alloy welding wire produced in my country has higher hydrogen content and oxidation inclusion content, which seriously affects the quality of the weld.
The welding wire often breaks during the drawing process, mainly due to the high content of oxide inclusions, coarse grains, and dendrite segregation, which lead to a decrease in the plasticity of the aluminum alloy.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029]The chemical composition of aluminum alloy welding wire is as follows:

[0030] Cu:6.2%, Ti:0.06%, Cr:0.1%, V:0.05%, Mn:0.1%, Sc:0.5%, Te:0.05%, Bi:0.01%, Mg≤0.2%, Fe≤0.2%, Si≤0.2%, individual content of other impurity elements≤0.05%, total content of other impurity elements≤0.15%, and the balance is Al.

[0031] Its preparation method is:

[0032] (1) Melting: Put aluminum ingots and intermediate alloys into the melting furnace for melting, add refining agent evenly into the melting furnace according to 0.05-0.1% of the total aluminum alloy, and use electromagnetic stirring to accelerate the melting speed during the melting process, aluminum After the liquid temperature reaches 700-730°C, use a slag removal vehicle to remove slag from the molten aluminum slag in the smelting furnace, control the slag removal time to 30 minutes, and the molten aluminum smelting time to 6 hours;

[0033] (2) Refining: The smelted aluminum liquid is transferred to the holding furnace for...

Embodiment 2

[0043] The chemical composition of aluminum alloy welding wire is as follows:

[0044] Cu:7.0%, Ti:0.10%, Cr:0.5%, V:0.2%, Mn:0.5%, Sc:1.5%, Te:0.2%, Bi:0.05%, Mg≤0.2%, Fe≤0.2%, Si≤0.2%, individual content of other impurity elements≤0.05%, total content of other impurity elements≤0.15%, and the balance is Al.

[0045] Its preparation method is:

[0046] (1) Melting: Put aluminum ingots and intermediate alloys into the melting furnace for melting, add refining agent evenly into the melting furnace according to 0.05-0.1% of the total aluminum alloy, and use electromagnetic stirring to accelerate the melting speed during the melting process, aluminum After the temperature of the liquid reaches 700-730°C, use a slag removal vehicle to remove slag from the molten aluminum in the melting furnace. The time for removing slag is controlled to be 40 minutes, and the time for melting aluminum is 8 hours;

[0047] (2) Refining: The smelted aluminum liquid is transferred to the holding f...

Embodiment 3

[0057] The chemical composition of aluminum alloy welding wire is as follows:

[0058] Cu:6.5%, Ti:0.07%, Cr:0.3%, V:0.1%, Mn:0.2%, Sc:1.0%, Te:0.1%, Bi:0.03%, Mg≤0.2%, Fe≤0.2%, Si≤0.2%, individual content of other impurity elements≤0.05%, total content of other impurity elements≤0.15%, and the balance is Al.

[0059] Its preparation method is:

[0060] (1) Melting: Put aluminum ingots and intermediate alloys into the melting furnace for melting, add refining agent evenly into the melting furnace according to 0.05-0.1% of the total aluminum alloy, and use electromagnetic stirring to accelerate the melting speed during the melting process, aluminum After the temperature of the liquid reaches 700-730°C, use a slag removal vehicle to remove the slag inclusions in the molten aluminum in the melting furnace. The time for removing slag is controlled to be 35 minutes, and the melting time for the molten aluminum is 7 hours;

[0061] (2) Refining: The smelted aluminum liquid is tran...

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Abstract

The invention relates to an aluminum alloy welding wire for aerospace and a preparation method of the aluminum alloy welding wire for aerospace. The aluminum alloy welding wire for aerospace is characterized by comprising the following chemical components in percentages by mass: 6.2-7.0% of Cu, 0.06-0.10% of Ti, 0.1-0.5% of Cr, 0.05-0.2% of V, 0.1-0.5% of Mn, 0.5-1.5% of Sc, 0.05-0.2% of Te, 0.01-0.05% of Bi, less than or equal to 0.2% of Mg, less than or equal to 0.2% of Fe, less than or equal to 0.2% of Si, less than or equal to 0.05% of single content of other impurity elements, less than or equal to 0.15% of total content of other impurity elements and the balance of Al. The preparation method of the aluminum alloy welding wire for aerospace comprises the following steps: smelting, refining, casting, homogenization, extrusion, drawing, and surface treatment. The aluminum alloy welding wire for aerospace provided by the invention is fine in weld microstructure and good in crack resistance; the tensile strength, the plasticity and the toughness of welded joints are remarkably higher than those of common 5556, 5654, 2319 or 2325 welding wires.

Description

technical field [0001] The invention relates to the technical field of processing an aluminum alloy welding wire, in particular to an aluminum alloy welding wire suitable for aerospace and a preparation method thereof. Background technique [0002] Aluminum alloy has high specific strength, specific modulus, fracture toughness, fatigue strength and corrosion resistance, and also has good forming process and weldability, and the cost is relatively low. Therefore, it has become a It is the most widely used non-ferrous metal structural material in the fields of train, chemical industry and military. For example, the command module and lunar module of the spacecraft, the storage tank of the launch vehicle, the storage tank of the satellite, the casing of the tactical missile, the casing of the ship, the aluminum alloy carriage of the high-speed train and the subway train, and the chemical container are all welded by aluminum alloy structural materials. . Aluminum alloy welding...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/12C22C1/06C22C1/03C22B9/05C23C22/08
CPCC22B9/05C22C1/026C22C1/03C22C1/06C22C21/12C23C22/08
Inventor 刘运强刘晓刚叶东张文凤
Owner GUILIN UNIV OF AEROSPACE TECH
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