Introduce the precautions when welding aluminum profiles
Source：http://m.just-ok.comRelease Time：2018-05-31
1, welding characteristics: aluminum and aluminum alloy has a strong thermal conductivity and heat capacity, linear expansion coefficient, low melting point and high temperature strength and other characteristics, welding is difficult, we must take certain measures to ensure the quality of welding.
2. Cleaning of pipe fittings and welding wire. The surface of the wire within the range of 50mm on both sides of the wire and breakage is cleaned with acetone. The surface oxide film is brushed with a stainless steel wire brush to expose the metal luster. The cleaned hole must be welded within 2 hours. A good wire is placed in an unused cartridge and must be used within 8 hours or it will be reprocessed.
3, tungsten rods use tungsten rods, argon blunt quality is not less than 99.96%, and the water content should not exceed 50mg/m3. 4 Ambient temperature is not lower than 5°C, otherwise it should be preheated to 100~200°C before welding, relative humidity control.
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