What is Current (Weld) in Welding?

The amount of electric charge flowing past a specified circuit point per unit time is called Current. It’s the main parameter for welding and has to be chosen to plate thickness and welding speed with respect to the weld quality.

The weld current affects penetration and deposition rate.

  • A high current results in a higher and narrower weld with a greater penetration depth.
  • Too high a welding current can result in undercuts, an uneven weld convexity, burn-through, thermal cracking, an inappropriate merging angle with the body material, and undercutting.

What is welding current and voltage?

The welding current is the amount of electric charge flowing past a specified circuit point per unit time. The welding voltage is the potential difference between two conductors.

What are the 3 types of welding currents?

There are three types of welding current:

  • direct current (DC),
  • alternating current (AC),
  • and pulsed current.

What is the difference between DC and AC welding current?

Direct current (DC) flows in one direction only, while alternating current (AC) alternates its direction of flow. Pulsed current is a type of DC where the flow is interrupted at regular intervals.

Why current is important in welding?

Current is important in welding because it helps to create the arc that is necessary for welding. Too much or too little current can cause problems with the weld.

Current setting in welding

The current setting in welding is very important because it determines the amount of heat that is generated. If the current is too high, it can cause problems such as burn-through, thermal cracking, and an uneven weld. If the current is too low, it can result in an incomplete weld or a poor quality weld.

Direct current welding definition

Direct current welding is a type of welding where the electric charge flows in one direction only. This type of welding is used for most types of metals.

Related Links

Eddy Current Weld Inspection
The ABCs of Eddy Current Weld Inspection
Weld Inspection Using Eddy Current Technology
Eddy Current Weld Probes, ECT Probes, UK
How to inspect with an EC Weld Probe

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