Welding rod technology

Welding rod technology

Date 06/05/2019
One of the most used welding techniques today is welding rods. The method of welding a cathode-ray tube (SNAW), is the method of using the arc heat generated between the coated rod and the solder to be welded. Welds are protected by the sheathing layer of the solder shell that decomposes during combustion. Welding rods do not use pressure. Metal filling is obtained from welding rods.
 
Advantages and applicability of welding technique:
 
Compared to other welding methods, the solder arc (SNAW arc welding) is the most widely used method.
 
Welding technique can be applied on many metals with all welding positions from the largest to the thickest.
 
Self-sticking sheaths provide a protective environment for the welding process.
 
Do not use gas protection should be less impact from the wind.
 
Equipment is cheap, simple and highly mobile.
 
Welding techniques are widely applied in manufacturing, agro-fishery, maintenance and construction.
 
Limitations of welding method:
 
Can not weld continuously
 
Low productivity due to stop to replace the rod
 
Waste of welding materials
 
After welding, the slag must be cleaned
 
Effect of welding rod sheath:
 
Coil sheathing provides a certain amount of protective gas from the decomposition of certain components in the sheath to protect the arc from oxidation due to the action of the air.
 
Help deoxidize, push the air to clean the metal weld after coagulation.
 
The slag layer is formed by the burning of the welding sheath to protect the non-oxidized welds after solidification.
 
The ionizing factor stabilizes the arc current and works in conjunction with alternating current.
 
The alloy elements contained in the welding rod increase the deposition rate for the weld metal.
 
Iron powder in the rod helps improve welding performance.
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