Arc welding

The arc welding is the most extensively used method of joining metal parts. In arc welding, the ends of the metal to be joined are heated to the molten state by the heat generated by the electric arc produced between the conductor electrode and parent metal

The principle of arc welding is that, when two conductors of

an electric circuit are brought together and separated for a

small distance (2-4mm), an electric arc is formed and the

temperature of the centre of the arc being 6000-7000⁰C.

In metal arc welding, a consumable welding rod coated with flux is

used as electrode as well as filler metal. In Carbon arc welding, anon-consumable carbon electrode is used for generating arc and an additional filler rod is used.