Arc welding process
Arc welding process itself has a group of welding processes wherein coalescence is produced by heating the job with an electric arc between a source and the work peace. Generally, there is no need to. the application of pressure in this process.
The use of arc was not possible before 1802. Although the discovery of electricity was started by Benjamin Franklin in 1752, the discovery of Alessandro Volta in 1800 AD made this path even clear when he proved that electricity can also be produced by chemical reactions.
But the arc welding could become possible when the electric dynamos or generators improved between 1870 to1880
The “welding arc” in arc welding is defined as a sustained electrical discharge through an ionized gas, where the arc is initiated by providing a conducting path between the electrode and the workpiece.
Definition of Arc welding
An Arc welding process is a permanent metal joining process wherein heat is obtained by generating an electric arc between an electrode and base metal. A temperature of about 6,500 degrees Fahrenheit is generated between the electrode and the base metal to melt the metal.
The Arc welding process is used to join metal pieces by heating them until it converts into a molten form. It is a simple, but effective way to join two pieces of metal together. The arc is created when the electrode comes into contact with the weldment (the piece of metal to be welded). After the arc is generated, the heat is maintained by keeping it at the desired distance which is called arc length.
Arc length is the distance of the arc produced between the metal to the electrode, when this distance starts increasing then it is called a long arc, and when it decreases it is called a short arc.
In the arc welding process, the stability of the arc is an important fact, An unstable arc can introduce many welding defects such as porosity, blowhole, slag trapping, lack of fusion, etc.
Several factors are responsible for the stability of the welding arc. Such as energy source, electrode movement, welder’s efficiency, etc. A steady arc provides the steady heat needed for a clean and strong joint
Further detail>>> Welding Arc stability
Type of Arc Welding
A large number of welding processes are using welding arcs to obtain the heat required for fusion. Here are the most common arc welding procedures:
Carbon arc welding
CAW is an arc welding wherein Fusion is produced by heating with an electric arc struck between a carbon electrode and work peace. Read More
GTAW is an arc welding process in which the desired heat is obtained using an electric arc, between the workpiece and the tungsten electrode. Read More
Electroslag & ElectrogasWelding
The Electroslag welding process is initiated by introducing an arc between the filler metal/electrode and the work. This arc heats the flux and melts it to form slag. Read More
SMAW is an arc welding process where fusion is done by an electric arc struck between a workpiece and the flux-covered electrode. Read More
It is an Arc welding process in which fusion is produced by heating the work along with an electric arc between the continuous filler metal electrode and the weld pool. Read More
Other Arc Welding processes
- SAW (Submerged Arc welding)
- ASW (Arc Spot Welding)
- SW (Stud Arc Welding)