Jan 062014
 

Manual arc welding is a manual welding process. The arc (about 5000 ° C) is the heat source, which burns between the coated welding electrode and the workpiece. The arc decomposes the electrode coating into slag and shielding gas to protect the passing drop and the weld from atmosphere.

The main difference for this welding process, compared to other welding processes, is that the shielding gas is produced by the coating of the electrode.
The kind of the coating has influence on the chemical composition of the welding material, the drop size and flow behavior of the slag and the melted mass.
Manual arc welding is used in many areas and in all welding positions and it can achieve a melting deposition rate of approximately 1.5 kg/h.

The advantages of manual stick electrode welding in comparison to gas metal arc welding are:
-lower demand for investments
-easy to handle.
Disadvantages:
-lower deposition efficiency
-higher slag formation
-often changing electrodes.

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Example of a Welding Transformer

Example of a Welding Transformer 

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