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TIG welding method of titanium alloy and pure aluminum plates

A technology of titanium alloy plate and welding method, which is applied in the direction of welding medium, welding equipment, welding equipment, etc., can solve the problems of strict assembly precision requirements of welding parts, large heat dissipation of titanium metal, and high equipment cost, so as to avoid pre-aluminizing treatment, Improve production efficiency and facilitate operation

Inactive Publication Date: 2013-01-30
夏雨
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process of realizing the connection and forming of aluminum-titanium dissimilar metals, if the general arc brazing method is adopted, the welding process has the following disadvantages: the heat dissipation of titanium metal is large, the existing equipment is expensive, and the production cycle is long
However, the assembly accuracy of weldments is strictly required, and the equipment cost is relatively high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1) Select the Ti-6Al-4V titanium alloy plate and 1060 pure aluminum plate with a thickness of 2mm to be connected, and process the groove angle of 35° on the surface of the titanium alloy plate to be connected;

[0032] 2) For the surface of the alloy plate to be connected, fully sand it with sandpaper to remove the surface oxide layer, and clean the surface of the base metal with ethanol or acetone, so that the roughness of the surface to be welded reaches Ra 1.8;

[0033] 3) Alloy welding wire with a diameter of 2.2mm is used, and its mass percentage composition is:

[0034] Mg: 5.2%,

[0035] Si: 0.15%,

[0036] Fe: 0.2%,

[0037] Cu: 0.03%,

[0038] Cr: 0.1%,

[0039] Zn: 0.06%,

[0040] Mn: 0.10%,

[0041] Ti: 0.05%,

[0042] The balance is Al;

[0043] 4) Dip the welding wire into 50%H 2 O+50%HNO 3 Solution, after 15 minutes, rinse with clean water, dry, and then polish with sandpaper;

[0044] 5) Then coat the active agent on the surface of the welding...

Embodiment 2

[0051]1) Select the Ti-6Al-4V titanium alloy plate and 1060 pure aluminum plate with a thickness of 2.5mm to be connected, and process the groove angle of 35-40° on the surface of the titanium alloy plate to be connected;

[0052] 2) For the surface of the alloy plate to be connected, fully sand it with sandpaper to remove the surface oxide layer, and clean the surface of the base metal with ethanol or acetone, so that the roughness of the surface to be welded reaches Ra 2.5;

[0053] 3) Alloy welding wire with a diameter of 2.6mm is used, and its mass percentage composition is:

[0054] Mg: 5.5%,

[0055] Si: 0.2%,

[0056] Fe: 0.25%,

[0057] Cu: 0.033%,

[0058] Cr: 0.15%,

[0059] Zn: 0.08%,

[0060] Mn: 0.12%,

[0061] Ti: 0.1%,

[0062] The balance is Al;

[0063] 4) Dip the welding wire into 50%H 2 O+50%HNO 3 Solution, after 18 minutes, rinse with clean water, dry, and then polish with sandpaper;

[0064] 5) Then coat the active agent on the surface of the we...

Embodiment 3

[0071] 1) Select the titanium alloy plate and pure aluminum plate to be connected with a thickness of 3mm, and first process the groove angle of 40° on the surface of the titanium alloy plate to be connected;

[0072] 2) For the surface of the alloy plate to be connected, fully sand it with sandpaper to remove the surface oxide layer, and clean the surface of the base metal with ethanol or acetone, so that the roughness of the surface to be welded reaches Ra 3;

[0073] 3) Alloy welding wire with a diameter of 2.8mm is used, and its mass percentage composition is:

[0074] Mg: 5.8%,

[0075] Si: 0.25%,

[0076] Fe: 0.3%,

[0077] Cu: 0.04%,

[0078] Cr: 0.2%,

[0079] Zn: 0.09%,

[0080] Mn: 0.15%,

[0081] Ti: 0.15%,

[0082] The balance is Al;

[0083] 4) Dip the welding wire into 50%H 2 O+50%HNO 3 Solution, after 20 minutes, rinse with clean water, dry, and then polish with sandpaper;

[0084] 5) Then coat the active agent on the surface of the welding wire. The ...

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Abstract

The invention provides a TIG (tungsten arc inert gas) welding method of a titanium alloy and pure aluminum plates. The method adopts a welding wire at specific ratio, an active agent is coated on the welding wire, argon tungsten-arc welding to titanium and the pure aluminum plates is performed, not only pre-alumetizing treatment related in a vacuum diffusion welding technology is avoided, but also welding cost in a vacuum environment or a laser condition is reduced. Filling material and pure aluminum plate parent metal are sufficiently molten and mixed during a welding process and then are solidified to form a welding line, and an obvious fusion area exists; a high-melting-point titanium alloy and a molten welding wire filling metal have mutual effect to form brazed connection, so that two metal liquid phase Ti and Al are prevented from being mixed, a large amount of fragile Ti-Al intermetallic compound is prevented from being produced, and simultaneously, the active agent on the surface of the welding wire has an effect of welding penetration increasing, so that the an artistic welding connector without cracks is formed through the welding line. The welding method has the advantages that production efficiency is improved, a performance of the connector is improved, and the welding method is convenient to operate.

Description

technical field [0001] The invention belongs to the technical field of welding of dissimilar materials, in particular to a TIG welding method of a titanium alloy and a pure aluminum plate. Background technique [0002] Titanium alloy has many excellent characteristics such as light weight, high strength, strong heat resistance and corrosion resistance. It is known as "the metal of the future" and is a new type of structural material with development prospects. Titanium and its alloys not only have very important applications in aviation and aerospace industries, but also have been widely used in many industrial sectors such as chemical industry, petroleum, light industry, metallurgy, and power generation. Aluminum has the advantages of high specific strength, good processability, superior physical and mechanical properties, and corrosion resistance. It is considered to be the most economical and practical material in many application fields. Aluminum exhibits excellent corr...

Claims

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Application Information

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IPC IPC(8): B23K9/167B23K9/23B23K9/235B23K33/00B23K35/28B23K35/362
Inventor 夏雨
Owner 夏雨
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