Aluminum is commonly used in a variety of welded construction products due to its light weight. high compressive strength, good corrosion resistance, no magnetic properties, good formability. and good ultra-low temperature characteristics. and the net weight of the construction could reduce 50% by using aluminum alloy instead of thick steel plate. Welding is the most efficient method of joining aluminum materials. Aluminum profile welding creates a watertight seal and the best electrical conductivity. Welding also provides continuous heat dissipation and transmission properties. and we offer various welding methods at Custom Aluminum Products.
Argon ARC Welding with Fused Electrodes
Melting electrode argon arc welding to weld medium and large thickness aluminum . and aluminum alloy plates with a DC reverse connection. When welding with this method, the welding speed is fast. and the heat-affected zone of the welded joint and deformation of the welded parts are small. Welded parts do not need to be preheated before welding. for example, an aluminum plate with a thickness of up to 30mm .
only needs to welded on the front and back sides of each layer. Porosity sensitivity is greater in automatic fusion electrode argon arc welding. which has an obvious relationship with the diameter of the wire. as a result, thick wire and larger welding current values are frequently used. the thicker the diameter of the wire, the smaller the specific surface area of the wire, and vice versa. When welding with fine wire, the number of impurities brought into the molten pool. by the surface of the aluminum wire is greater than when welding with coarse wire. making it easy to produce a porosity deficiency. If the thickness of the aluminum plate is greater than 8mm and processed into a V-shaped bevel.
High arc power and fast welding speed are two advantages.
Application: used for welding thick parts with a thickness of 50mm or less.
Tungsten ARC Welding by Hand
In manual tungsten arc welding. an alternating current (AC) power source to remove the oxide film . on the surface of the welded part via the “cathode crushing effect.” Argon purity must be greater than 99.99%, with less than 0.04% nitrogen, less than 0.03% oxygen, and less than 0.07% moisture. When nitrogen exceeds the standard value. the surface of the weld will produce a yellowish or grass green compound (nitride) and porosity. causing difficulties in welder operation. and when oxygen exceeds the standard value. there will be dense black spots on the surface of the molten pool, making the arc unstable, spatter
Characteristics: poor joint quality
Application: used for welding and general maintenance on cast aluminum parts.
The thermal power of the oxy-acetylene gas welding flame is low. the heat is more dispersed, and the welded parts deform, resulting in low productivity. When welding thicker aluminum weldments with gas welding, preheating is required. and the resulting weld metal is not only coarse grain, loose tissue. and prone to defects such as aluminum oxide inclusions, porosity, and cracks. This method is only used for welding minor aluminum structural parts and castings ranging in thickness from 0.5 to 10mm.
Low thermal power, large deformation of welded parts, low productivity, slag, cracks, and other defects are common.
Application scope:Used for minor occasions such as thin plate butt welding and patch welding, among others.
Pulsed Tungsten ARC Welding with a Melting Electrode
Small welding current, wide range of parameter adjustment, low welded part deformation. suitable for thin plate welding and all-position welding. 212mm is a common measurement.
Small welding deformation, good resistance to porosity and cracking. and a wide range of process parameter adjustment
Application scope: for thin plate or all-position welding, commonly used for workpieces ranging in thickness from 2 to 12mm.
Welding with Tungsten ARC
When using this method, the heat is more concentrated. the arc combustion is stable, the weld metal is dense, the strength and plasticity of the welded joint are high. and it is widely used in industry. Tungsten arc welding for aluminum alloy is a more perfect welding method. but the equipment is more complicated and not suitable for use in open-air conditions.
Features include dense weld metal, high joint strength and plasticity, and high quality joints.
Application: widely used; can weld plate thicknesses ranging from 1 to 20 mm.
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