Tips For Welding Aluminum

The wire welding torch is more suitable for welding aluminum. If you cannot use this welding torch, try to use a shorter welding torch to keep the welding torch straight. You can only use argon gas as the shielding gas. Welding machine).

If you find a wire feeding problem, you can try a conductive head that is one size larger than the welding wire.

The more commonly used welding wire for welding aluminum is the softer standard welding wire. The other is harder (easier to feed wire), and it is mainly used in welding operations that require higher hardness and strength.

Before the welding starts, the oxide layer on the aluminum surface should be removed, and a special stainless steel brush should be used to remove the oxide layer.

Fill the arc crater at the end of welding to prevent cracks. One way is to leave the welding gun in the molten pool for a few seconds after welding.

Precautions

  1. Welding of aluminum

Welding characteristics: Aluminum and aluminum alloys have the characteristics of strong thermal conductivity, large heat capacity, large linear expansion coefficient, low melting point and low high-temperature strength. Welding is difficult, and certain measures should be taken to ensure the welding quality.

Cleaning of pipe fittings and welding wire, the surface of the welding wire and the break within 50mm of both sides should be cleaned with acetone, and the surface oxide film should be brushed with a stainless steel wire brush to reveal the metallic luster. The cleaned break must be welded within 2 hours and cleaned The welding wire is put into an unused barrel and must be used up within 8 hours, otherwise it will be reprocessed.

The tungsten rod is made of cerium tungsten rod, the argon passivation is not less than 99.96%, and the water content should not be greater than 50mg/m³.

The ambient temperature is not lower than 5℃, otherwise it should be preheated to 100~200℃ before welding, relative humidity control.