Standard of Aluminum Welding
Almost all welding methods can be used for welding aluminum and aluminum alloys, but aluminum and aluminum alloys have different adaptability to various welding methods, and various welding methods have their own application occasions. Gas welding and electrode arc welding methods are simple and easy to operate.
Gas welding can be used to welding thin aluminum plates and castings that do not require high welding quality. Welding electrode arc welding can be used for welding aluminum alloy castings.
The inert gas shielded welding (TIG or MIG) method is the most widely used welding method for aluminum and aluminum alloys. Aluminium and aluminum alloy sheets can be tungsten arc argon arc welding or tungsten electrode argon arc welding. Aluminium and aluminum alloy thick plates can be tungsten arc welding, argon-helium hybrid tungsten gas shielded welding, gas metal arc welding, pulsed gas metal arc welding. Gas metal arc welding, pulsed gas metal arc welding is more and more widely used (argon or argon/helium mixture)
Post-weld treatment of Aluminum Welding
- Residual flux and welding slag that remain in the weld and its vicinity after welding will destroy the passivation film on the aluminum surface, and sometimes it will corrode aluminum parts and should be cleaned. Simple shapes and common parts can be cleaned with hot water or steam blow. The aluminum parts with high requirements and complex shapes are brushed with a bristle brush in hot water, and then immersed in a solution of chromic anhydride or potassium dichromate at a concentration of 2% to 3% for 60 minutes at about 60°C to 80°C. ~ 10min, and scrubbing with a bristle brush, then washing in hot water, drying with an oven, or drying with hot air, can also be naturally dry.
- Post-weld heat treatment Aluminum containers generally do not require heat treatment after welding.
- Aluminum recycling aluminum is one of the most important non-ferrous metal species. Due to its good properties (low density, good plasticity and formability) and easy recovery, pure aluminum and aluminum alloys have become important basic materials in home appliances. Widely used in home appliances, thermal parts, conductive parts and other parts of the building. The recycling of scrap aluminum has become the most important part of non-ferrous metal recycling, and its energy consumption, regeneration costs, etc. are much lower than the production of primary aluminum (about 10%).