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Pure aluminum is a soft and well -ductive metal. For most structures, its strength is low. To increase the intensity of aluminum, alloying elements need to be added. Copper, silicon, manganese, magnesium, and zinc are used as the main element to play a solid -soluble reinforcement effect. Aluminum and aluminum alloy have been widely used in many industries.
The welding of aluminum and aluminum alloy is more difficult than low -carbon steel. Its welding characteristics are different from low -carbon steel. The specific performance is as follows:
1. Soferality of welded connecting mechanical performance, decreased corrosion resistance.
2. The chemical activity is very strong, and the surface is easily formed.
3. Strong thermal conductivity, and it is easy to cause insoluble phenomenon during welding.
4. Successive defects such as pores, cracks, bite edges, slag and weld forming.
5. Large line expansion coefficient (about 2 times the low -carbon steel), which is prone to warp and deformation during welding.
6. The thermal conductivity is large (about 5 times the low -carbon steel). At the same welding speed, the thermal input is 2 to 4 times larger than the welding steel.
The aluminum alloy is welded with TIG or GMAW.
1．Aluminum alloy tig welding
If you need to obtain the highest quality welding, Tig welding is often the first choice. The most suitable process method is to exchange TIG welding and AC pulse TIG welding. There are several advantages:
1. When welding, the cathode atomization characteristics can be removed by itself.
2. The connection form is not limited, the surface is smooth and good for molding.
3. The welding area of the airflow to cooled the joints to cool down and improve the organization and performance.
Therefore, this process is very suitable in high -quality and extremely important aerospace industry. Of course, its disadvantages are also very obvious. Welding efficiency is low, and it is not suitable for production of large -scale high -efficiency.
1．Aluminum alloy GMAW welding
Gmaw welding has gradually entered our lives. DC reverse connection is usually used during welding, and pulse welding can also be used. Compared with TIG welding, GMAW welding has the following advantages:
1. There is almost no oxidative burns during the welding process, and the process is simpler.
2. High labor productivity.
3. Do not adopt tungsten poles, low cost.
When welding in GMAW, pay attention to the following points:
1. You need to use a plastic -based silk hose, and the steel hose cannot be used.
2. The aluminum welding wire is soft and the wire delivery is poor. You need to choose a U -shaped groove wire delivery wheel.
3. Use the proper inner diameter conductive mouth.
4. Do not share the parts with steel welding to avoid pollution.
GMA-A5356 uses the effect on the site of a customer
This data shares with users who are underway or are about to be welded, allowing us to make progress on the road of aluminum alloy welding.
The normal supply products of our company are as follows:
TIG MIG
GTA-A4043 GMA-A4043
GTA-A5183 GMA-A5183
GTA-A5356 GMA-A5356
Post time: Nov-14-2022