Question
Download Solution PDFWhich of the following statements is correct regarding the metal inert gas welding process?
l) Spatter is a problem.
ll) Electrode is in the form of a wire.
lll) Tungsten inclusion is a rampant defect.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
Metal inert gas welding or gas metal arc welding:
- it uses continuous solid wire consumable electrode.
- the electrode is heated and fed into the weld pool from the welding gun.
- MIG welding is done in an inert gas atmosphere.
- The shielding gases for MIG welding are mixtures of argon, oxygen and carbon dioxide and a special gas mixture may contain helium.
- Excessive speed or irregularity in wire feed results in the welding spatter. Spatter occurs when the filler material enters the weld pool.
- Direct current power supply is used to weld the workpiece.
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