Topic 3.3: Welding ProcessesCLD 20502 Basic Engineering WorkshopTopic 3: Metal Joining Process
Introduction3 types of arc welding will be discussed here. Arc welding is a type of fusion welding which used heat to melt the base metal.
Shielded Metal Arc Welding (SMAW)The arcis created between the electrode and the workpiece due to the flow of electricity.The arc provides heat or energy to melt the base metal, filler metal and electrode coating.The welding leaves solidified weld metal covered by a layer of converted flux which is called slag.
Shielded Metal Arc Welding (SMAW)Electrode– the primary elementMetal core wire covered with a layer of granular flux held in some type of bonding agent.When an arc struck the following happens:- Shielding, Deoxidation, Alloying, Ionizing, InsulatingSMAW Electrode identification systemE X X X X
Shielded Metal Arc Welding (SMAW)Advantage of SMAWSimple and inexpensive equipmentNumerous types of electrodesResulting weld quality is consistently high.LimitationRelatively slow in speedNeed a slag removalSome electrode need a special storage.
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Arc welding, Gas tungsten arc welding, Gas metal arc welding, Shielding gas, Arc welding