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Alloy powder filled tungsten argon arc welding method for aluminum alloy

A technology of argon tungsten arc welding and alloy powder, which is applied in the direction of welding medium, welding equipment, welding equipment, etc., can solve the problems of low welding speed and deposition efficiency, high requirements for wire feeding accuracy, and low arc power density. , to achieve high deposition efficiency, lower assembly precision requirements, and large welding penetration

Active Publication Date: 2016-03-23
SUZHOU YUNSHOU SOFTWARE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. Low welding efficiency and small penetration depth
Due to the limited capacity of the tungsten electrode to carry current, and the expansion of the free arc shape, the power density of the arc is small, so that the formed weld penetration is shallow, the welding speed and deposition efficiency are not high, and the production efficiency is low when welding medium and thick plates.
[0005] 2. Large stomatal tendency
The protective gas argon used in conventional argon tungsten arc welding without filler materials has no deoxidation and dehydrogenation effects, and the welding process is sensitive to pores
[0006] 3. When automatic wire feeding is used for welding, the wire feeding system is relatively complicated, and the wire feeding accuracy is required to be high; when manual wire feeding is used for welding, the wire feeding efficiency is low, and continuous welding production of long welds cannot be carried out

Method used

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  • Alloy powder filled tungsten argon arc welding method for aluminum alloy
  • Alloy powder filled tungsten argon arc welding method for aluminum alloy
  • Alloy powder filled tungsten argon arc welding method for aluminum alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1: as image 3 As shown, the aluminum alloy workpiece 2 to be welded is the butt joint of two flat plate structures with a thickness of 6 mm. The workpiece 2 has a 30° V-shaped groove, and the height of the blunt edge is 2 mm. The two workpieces 2 are clamped by the fixture without leaving any assembly gap. Set the welding current to 120A, the welding speed to 12m / h, the flow rate of shielding gas 14 to 7L / min, the flow rate of powder feeding working gas 15 to 4L / min, the amount of alloy powder feeding to 150g / min, and the diameter of tungsten electrode 8 to be 2.4 mm. Alloy powder material consists of 6%Cr by weight 2 o 3 Powder, 4%TiO 2 powder and the balance of Al powder, the alloy powder material is dried and placed in the powder feeding mechanism 1, and the alignment between the tungsten electrode 8 and the powder feeding nozzle 3 is corrected so that the extension line of the tungsten electrode 8 and the powder feeding nozzle 3 are sprayed along Th...

Embodiment 2

[0035] Embodiment 2: as Figure 4 As shown, the aluminum alloy workpiece 2 to be welded is the butt joint of two flat plate structures with a thickness of 3mm. The workpiece 2 is not beveled, and the two workpieces 2 are clamped by a fixture, and the assembly gap is 1mm. Alloy powder material consists of 6%Cr by weight 2 o 3 Powder, 4%TiO 2 Al powder and the balance of Al powder, the alloy powder material is dried, mixed thoroughly with acetone solution, and evenly brushed and filled in the reserved gap of the workpiece 2 to be welded, and a certain layer of alloy powder is formed on the surface of the part to be welded. The acetone solution in the preset alloy powder 17 is completely volatilized. Set the welding current to 120A, the welding speed to 10m / h, the flow rate of the shielding gas 14 to 7L / min, and the diameter of the tungsten electrode 8 to 2.4mm. Turn on the argon tungsten arc welding torch 4 to supply gas in advance to protect the area to be welded, and then ...

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Abstract

The invention discloses a tungsten argon arc welding method, which is applied to aluminum alloy materials and uses alloy powder as welding and filling materials. Besides aluminum powder, the aluminum base alloy powder used in the method further comprises an active powder component and an arc stabilizer powder component. The aluminum base alloy powder is added into welding lines of the aluminum alloy materials to be welded by means of automatic filling, homogeneous materials can be welded, dissimilar materials can also be welded, and the technical problems of low welding efficiency and large air hole inclination in the process of tungsten argon arc welding can be solved, so that high-quality welding joints are obtained.

Description

technical field [0001] The invention relates to an aluminum alloy powder filled tungsten argon arc welding method, which is suitable for welding aluminum and aluminum alloy materials. Background technique [0002] Aluminum and aluminum alloys are widely used in aviation, aerospace, automobiles, Locomotives, machinery manufacturing, shipbuilding, chemical industry, national defense and military and other fields have extremely important application value and broad application prospects. [0003] The argon tungsten arc welding method is a fusion welding method commonly used for aluminum alloy materials. The following problems often exist when welding aluminum alloys with conventional argon tungsten arc welding methods: [0004] 1. The welding efficiency is low and the penetration depth is small. Due to the limited capacity of the tungsten electrode to carry current, and the expansion of the free arc shape, the power density of the arc is small, so that the formed weld penetra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/167B23K35/28B23K35/36B23K103/10
Inventor 罗怡杜长华李春天
Owner SUZHOU YUNSHOU SOFTWARE TECH CO LTD
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