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Tungsten electrode argon arc welding method for filler wires of titanium alloy and aluminum alloy

A technology of argon tungsten arc welding and argon tungsten arc welding, which is applied in arc welding equipment, welding equipment, metal processing equipment, etc., can solve the problem of high equipment cost, achieve the effects of convenient operation, stable joint performance, and easy promotion and application

Inactive Publication Date: 2012-08-01
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When laser welding is used to connect titanium, aluminum and their alloys, the assembly accuracy of the weldment 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

[0025] Filled tungsten argon arc welding of TA15 titanium alloy and 5A06 aluminum alloy plate. The size of the TA15 titanium alloy plate is 100mm×40mm and the thickness is 2mm; the size of the 5A06 aluminum alloy plate is 100mm×80mm and the thickness is 2mm.

[0026] The first step, surface treatment of TA15 titanium alloy plate, 5A06 aluminum alloy plate and welding wire:

[0027] First, polish the butt joint between TA15 titanium alloy and 5A06 aluminum alloy with sandpaper, so that the surface to be welded will reveal a metallic luster, and the surface roughness will reach Ra 1.6-3.2;

[0028] Al-Mg5 alloy welding wire with a diameter of 2.0mm was used as the filler metal, and the surface of the welding wire was polished with sandpaper before welding to reveal a metallic luster.

[0029] The second step, the assembly of TA15 titanium alloy and 5A06 aluminum alloy plate:

[0030] Place the TA15 titanium alloy and the 5A06 aluminum alloy plate horizontally, and the assembly...

Embodiment 2

[0039] Filled tungsten argon arc welding of TA15 titanium alloy and 5A06 aluminum alloy plate.

[0040] The size of the TA15 titanium alloy plate is 100mm×40mm, and the thickness is 3mm; the size of the 5A06 aluminum alloy plate is 100mm×80mm, and the thickness is 3mm.

[0041] The first step, preparation before welding of TA15 titanium alloy plate, 5A06 aluminum alloy plate and welding wire:

[0042] First process the TA15 titanium alloy plate to be connected to a groove with a groove angle of 30° and a blunt edge of 2mm; then polish the groove and its surroundings with sandpaper until the metallic luster is exposed;

[0043] Use sandpaper to polish the surface of the 5A06 aluminum alloy to be welded, so that the surface roughness reaches Ra1.6-3.2;

[0044] Al-Mg5 alloy welding wire with a diameter of 2.4 mm was used as the filler metal, and the surface of the welding wire was polished with sandpaper before welding to reveal a metallic luster.

[0045] The second step, the...

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Abstract

The invention discloses a tungsten electrode argon arc welding method for filler wires of a titanium alloy and an aluminum alloy. The method comprises the following steps of: cleaning the surfaces to be connected of the titanium alloy and the aluminum alloy and the surfaces of Al-Mg alloy system welding wires for filling; horizontally splicing a titanium alloy plate with an aluminum alloy plate; controlling the heat distribution by means of tungsten electrode argon arcs, and performing tungsten electrode argon arc welding on the filler wires; and simultaneously protecting the front surface and the rear surface by using pure argon in the welding process, wherein the welding process parameters are as follows: 12 to 15 V of welding voltage, 90 to 120 A of welding current, 50 to 80 mm / min of welding speed, and 10 to 15 L / min of argon flow. The tungsten electrode argon arc welding method for the filler wires of the titanium alloy and the aluminum alloy has the advantages of convenience for operation, stable performance of joints, low cost, convenience for popularization and application and the like and is particularly suitable for welding of the titanium alloy and an aluminum magnesium alloy.

Description

technical field [0001] The invention belongs to the technical field of welding of dissimilar materials, and in particular relates to a wire-filling tungsten argon arc welding method for titanium alloy and aluminum alloy. Background technique [0002] Titanium alloys and aluminum alloys are widely used structural materials in aerospace, chemical, automotive and other fields. Due to the low strength and heat resistance of aluminum alloys, and the high density and high price of titanium alloys, composite components made of titanium and aluminum alloys can not only give full play to the performance potential of titanium, aluminum and their alloys, but also Reduce the quality of components, reduce production costs and meet the requirements of its special comprehensive performance. However, the physical properties such as melting point, thermal conductivity, thermal expansion coefficient, and crystal structure of titanium and aluminum alloy are very different. During welding, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/167B23K9/235
Inventor 王娟刘强李亚江
Owner SHANDONG UNIV
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