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Laser preprocessing wire filling tungsten inert gas (TIG) welding method of titanium alloy and pure aluminum sheets

A laser pretreatment, titanium alloy plate technology, applied in welding media, welding equipment, welding equipment and other directions, can solve the problems of inconsistent compound composition and structure size, unsuitable for large-volume aluminum-titanium material connection and molding, long production cycle, etc. , to achieve the effect of homogenization of microstructure, good quality and stability, and reduction of welding heat loss

Inactive Publication Date: 2013-05-08
东莞昶能镭射金属科技有限公司
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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 simple 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, this method has relatively high requirements on the welding process and parameters, and it is easy to cause inconsistency in the composition of the compound and the size of the tissue at the weld. Moreover, the welding method requires forming in a vacuum environment. From the perspective of economic productivity, the cost is relatively high, and it is not suitable for large-scale Batch aluminum titanium material connection forming

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1) Select a Ti-6Al-4V titanium alloy plate and a 1060 pure aluminum plate with a thickness of 2.5mm, and open grooves of equal size on the sides of the two plates, and the angle of the V-shaped structure formed by the butt joint of the side grooves of the two plates 20 degrees, and then carry out surface treatment on the titanium alloy plate and the pure aluminum plate to be welded respectively. The treatment process is: use sandpaper to polish - metal cleaning liquid degreasing - water washing - dilute hydrofluoric acid corrosion - water washing - acetone Cleaning - drying to remove the oxide layer, impurities and oil stains on the surface of the plate;

[0026] 2) Prepare a solution with the following ratio: 93% industrial pure aluminum, 4% Fe and 3% Si, and then perform liquid immersion treatment on the part of the titanium alloy plate to be welded, the residence time is 22 minutes, and the heating temperature is 690 ° C to form The thickness of the aluminized layer ...

Embodiment 2

[0037] 1) Select a Ti-6Al-4V titanium alloy plate with a thickness of 3mm and a 1060 pure aluminum plate, open grooves of equal size on the sides of the two plates, and form a V-shaped structure formed by the butt joint of the side grooves of the two plates The angle is 15 degrees, and then the surface treatment is carried out on the titanium alloy plate and the pure aluminum plate to be welded respectively. The treatment process is: use sandpaper to polish——metal cleaning liquid degreasing—water washing—dilute hydrofluoric acid corrosion—water washing—— Acetone cleaning - drying to remove the oxide layer, impurities and oil stains on the surface of the board;

[0038] 2) Prepare a solution with the following ratio: 94% industrial pure aluminum, 4% Fe and 2% Si, and then perform liquid immersion treatment on the part of the titanium alloy plate to be welded, the residence time is 25 minutes, and the heating temperature is 700 ° C to form The thickness of the aluminized layer i...

Embodiment 3

[0049] 1) Select a Ti-6Al-4V titanium alloy plate and a 1060 pure aluminum plate with a thickness of 3.5mm, and open grooves of equal size on the sides of the two plates, and the side grooves of the two plates are connected to form a V shape The angle of the structure is 10 degrees, and then the surface treatment is carried out on the titanium alloy plate and the pure aluminum plate to be welded respectively. The treatment process is: use sandpaper to polish——metal cleaning liquid degreasing—water washing—dilute hydrofluoric acid corrosion—water washing ——Acetone cleaning——drying to remove the oxide layer, impurities and oil stains on the surface of the board;

[0050] 2) Prepare a solution with the following ratio: 94% industrial pure aluminum, 4% Fe and 2% Si, and then perform liquid immersion treatment on the part of the titanium alloy plate to be welded, the residence time is 28 minutes, and the heating temperature is 720 ° C to form The thickness of the aluminized layer i...

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Abstract

The invention provides a laser preprocessing wire filling tungsten inert gas (TIG) welding method of titanium alloy and pure aluminum sheets. Firstly, a titanium alloy sheet and a pure aluminum sheet are cleaned. Secondly, a to-be-welded part of the titanium alloy sheet undergoes liquid immersing processing. Thirdly, a laser is utilized to preprocess the to-be-welded surface of the lateral side of the titanium alloy sheet, wherein the surface of the lateral side of the titanium alloy sheet undergoes aluminizing so that a stable middle layer which is easy to combine is formed, and meanwhile, after laser processing, the to-be-welded surface of titanium alloy undergoes self cooling quenching. Finally, a welding wire with specific proportioning is utilized for TIG of titanium and the pure aluminum sheet, and the titanium alloy sheet and the aluminum sheet can be connected through the middle layer by welding. The laser preprocessing wire filling TIG welding method of the titanium alloy and pure aluminum sheets improves plasticity and toughness of a joint, operation is simple, cost is low, and connection effect is good.

Description

technical field [0001] The invention belongs to the technical field of welding of dissimilar materials, and in particular relates to a laser pretreatment wire-filling TIG welding method of a titanium alloy and a pure aluminum thin plate. [0002] Background technique [0003] 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. The application of titanium alloy involves many fields, and the application in the aerospace field is the most prominent. Aluminum alloy is the main structural material in aircraft manufacturing. Most of the key load-bearing parts (such as wings, shells, empennages, etc.) And it has begun to be widely used in many industrial sectors such as chemical industry, petroleum, light industry, metallurgy, and power generation. Aluminum has the advantages of high spec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/167B23K9/23B23K9/235B23K33/00B23K35/28B23K103/18
Inventor 梁建波
Owner 东莞昶能镭射金属科技有限公司
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