Aluminum alloy welding precautions
专栏:Industry information
发布日期:2016-09-28
阅读量:722
作者:佚名
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Aluminum alloy is widely used in industrial products because it has good physical properties. However, due to improper selection of welding methods and welding process parameters, aluminum a..........
Aluminum alloy is widely used in industrial products because it has good physical properties. However, due to improper selection of welding methods and welding process parameters, aluminum alloy parts are severely deformed due to excessive stress after welding, or because of welds. Defects such as pores, slag inclusions, and incomplete penetration lead to cracks in the weld metal or loose material, which seriously affects product quality and performance. Next, we will introduce the aluminum alloy welding method and aluminum alloy welding precautions for everyone.

Aluminum alloy welding method

1, tungsten argon arc welding

Tungsten argon arc welding is mainly used for aluminum alloys, which is a good welding method. However, tungsten argon arc welding equipment is complicated and is not suitable for operation under open air conditions.

2, resistance spot welding, seam welding

This welding method can be used to weld aluminum alloy sheets with a thickness of less than 5 mm. However, the equipment used in welding is complicated, the welding current is large, and the productivity is high, and it is particularly suitable for the mass production of parts and components.

3. Pulsed argon arc welding

Pulsed argon arc welding can improve the stability during welding and can adjust parameters to control arc power and weld formation. The weldment has small deformation and small heat-affected zone, and is especially suitable for welding on thin plates, all-position welding, etc., as well as forging aluminum, hard aluminum, super-hard aluminum, etc. with high heat sensitivity.

Aluminum alloy welding precautions

1. Before welding the aluminum alloy, the surface of the aluminum alloy should be cleaned first. There should be no oil, dust, etc. The surface of the aluminum alloy welded joint can be cleaned with acetone. The thick aluminum alloy should be cleaned with a wire brush, and then added with acetone.

2. When welding aluminum alloy, first clean the surface of the aluminum alloy, there must be no oil smoke, dust, etc. In addition, the thick aluminum alloy should be cleaned with a wire brush, and then added with acetone.

3. If the board can be preheated after comparison, this can prevent the preheating from being insufficient to cause the welding to be impervious. When the arc is closed, the arc should be filled with a small current.

4, must be standardized when welding, according to the thickness of the plate to weld

5. The cable of the welding torch should not be too long. If it is too long, the wire feeding will be stable.


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