Understanding the Consumable Shielded Metal Arc Welding (SMAW) Process
What is the phenomenon called when welding with the consumable Shielded Metal Arc Welding (SMAW) process?
When welding with the consumable Shielded Metal Arc Welding (SMAW) process, the use of magnetism to transfer the electrode tip into the puddle is called "arc blow." Arc blow is a phenomenon that occurs due to magnetic forces created by the electrical current passing through the welding circuit.
Arc Blow in the Consumable SMAW Process
Arc blow is a common issue encountered in the Shielded Metal Arc Welding (SMAW) process, where magnetic forces interfere with the welding arc and molten metal flow. These magnetic forces can cause deviations in the weld bead and make it challenging to control the welding process.
Techniques to Mitigate Arc Blow
To overcome arc blow, various techniques can be employed:
- Changing the welding position
- Adjusting the electrode angle
- Using magnetic field modifiers
- Employing special welding techniques like back-stepping
By applying these measures, welders can minimize the impact of magnetic forces and ensure a more stable and controlled welding process.
It's important to note that magnetism is not actually used to transfer the electrode tip into the puddle in the consumable SMAW process. Instead, the process involves arc welding, where an electric arc melts the electrode tip to join metals, not magnetism.