Welding method of aluminum-magnesium alloy with medium thickness

A welding method and technology of aluminum-magnesium alloy, applied in welding equipment, laser welding equipment, welding/welding/cutting objects, etc., can solve problems such as pores and cracks, reduce welding deformation, improve comprehensive production efficiency, and improve the welding process. stable effect

Active Publication Date: 2017-01-11
BEIJING HANGXING MACHINERY MFG CO LTD
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  • Abstract
  • Description
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Problems solved by technology

[0010] Another object of the present invention is to provide a medium-thickness aluminum-magnesium alloy welding method, which can solve the technical problems of defects such as pores

Method used

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  • Welding method of aluminum-magnesium alloy with medium thickness
  • Welding method of aluminum-magnesium alloy with medium thickness

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0051] Example 1

[0052] 1. The aluminum-magnesium alloy sheet to be welded is made into a Y-shaped groove by mechanical processing, the thickness of the blunt side of the groove is 3mm, and the groove angle is between 60°, as attached figure 1 Shown. After the test plate groove processing is completed, chemical cleaning is carried out. The specific method is: alkaline washing with 10% NaOH solution at 70°C for 7 minutes, washing with flowing water, then pickling with 30% HNO3 solution at room temperature to 60°C for 3 minutes, and washing with flowing water. Air drying or low temperature drying;

[0053] 2. Fix the welding test plate on the welding platform with a welding pressure plate to ensure that the gap is less than 0.5mm and the step difference is not more than 1mm;

[0054] 3. A single-spot or double-beam laser beam can be used to perform bottom welding on the weld to be welded. The laser beam includes CO 2 Gas laser beam, Nd: YAG solid laser beam, semiconductor laser bea...

Example Embodiment

[0057] Example 2

[0058] 1. The aluminum-magnesium alloy sheet to be welded is made with a Y-shaped groove by mechanical processing, the thickness of the groove is 1mm, and the groove angle is between 30°, as attached figure 1 Shown. After the test plate groove is processed, chemical cleaning is carried out. The specific method is: alkaline washing with 5% NaOH solution at 40°C for 3 minutes, washing with flowing water, and then using 30% HNO at room temperature to 60°C 3 Pickling with solution for 1 min, rinse with running water, air-dry or low-temperature drying;

[0059] 2. Fix the welding test plate on the welding platform with a welding pressure plate to ensure that the gap is less than 0.5mm and the step difference is not more than 1mm;

[0060] 3. Single-spot or double-beam laser beams can be used to perform under-welding on the weld to be welded, and the laser beams include CO 2 Gas laser beam, Nd: YAG solid laser beam, semiconductor laser beam and fiber laser beam. Accordi...

Example Embodiment

[0063] Example 3

[0064] 1. The aluminum-magnesium alloy sheet to be welded is made with a Y-shaped groove by mechanical processing, the thickness of the groove is 2mm, and the groove angle is between 45°, as attached figure 1 Shown. After the test plate groove is processed, chemical cleaning is carried out. The specific method is: alkaline washing with 7% NaOH solution at 55°C for 5 minutes, flushing with flowing water, and then using 30% HNO at room temperature to 60°C 3 Pickling solution for 1min~3min, rinse with running water, air-dry or low-temperature drying;

[0065] 2. Fix the welding test plate on the welding platform with a welding pressure plate to ensure that the gap is less than 0.5mm and the step difference is not more than 1mm;

[0066] 3. A single-spot or double-beam laser beam can be used to perform bottom welding on the weld to be welded. The laser beam includes CO 2 Gas laser beam, Nd: YAG solid laser beam, semiconductor laser beam and fiber laser beam. Accordin...

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Abstract

The invention discloses a welding method of an aluminum-magnesium alloy with a medium thickness. The welding method comprises the following steps: machining a Y-shaped groove in a welding region of a product to be welded, and then chemically cleaning the Y-shaped groove of the product to be welded; assembling and fixing the product to be welded; performing backing welding on a welding line of the product to be welded by adopting laser welding; mechanically grinding a laser backing welding line obtained in the last step until a metallic luster appears; performing cosmetic welding on the slope surface of the Y-shaped groove above the ground laser backing welding line by adopting a CMT welding method to form a front welding line surplus height. According to the welding method disclosed by the invention, the laser backing welding is fully used, so that complete welding of a blunted edge is guaranteed; the groove in the upper part is capped by using the CMT welding to form the front surplus height; therefore, the problems of pores in welds and incomplete welding of the aluminum-magnesium alloy with the medium thickness are effectively solved; meanwhile, ultralow heat input reduces welding deformation and improves the forming precision of a welded structure; the method is stable in welding process and controllable in welding line quality, and the comprehensive production efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of material processing, in particular to a medium-thickness aluminum-magnesium alloy welding method. Background technique [0002] Aluminum-magnesium alloy is a non-heat-treated strengthened antirust aluminum alloy with magnesium as the main alloying element. It has low material density, high strength, high thermal conductivity, strong corrosion resistance, and good physical and mechanical properties, so it is widely used It is used in the welding structure of industrial products, especially aerospace products. [0003] Although aluminum-magnesium alloy has many advantages as a structural material, its special physical properties increase the difficulty of welding. The defects that are prone to occur during the welding process of aluminum-magnesium alloys are as follows: [0004] (1) Pores Pores are the most common welding defects in the welding of aluminum-magnesium alloys. The main reasons for their form...

Claims

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Application Information

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IPC IPC(8): B23K26/24B23K26/60B23K26/70
CPCB23K26/24B23K26/60B23K26/702B23K2103/10B23K2103/15
Inventor 曲宏韬步贤政胡洋王志敏韩铁姚为
Owner BEIJING HANGXING MACHINERY MFG CO LTD
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