Welding Flashcards
How is gas welding achieved?
An acetylene torch has a mixture of acetylene gas and oxygen, making a small, hot flame. This is used to melt the filler rod and the surrounding material.
How is spot welding achieved?
Copper electrodes sandwich the metal and then a current is passed through them, heating the heat to bond two metals in a small spot using resistance.
What type of welding is spot welding?
It’s called resistance welding.
How is metal inert gas (MIG) welding achieved?
A spark goes between the electrode and the work piece, melting the electrode. This then gets fed in by steel wire and the area is cooled using a gas mixture of argon and carbon dioxide.
How is tungsten inert gas (TIG) welding achieved?
It is achieved in the same way as MIG, only the electrode does not melt.
What is the difference between MIG and TIG welding?
MIG is used in school to bond steels.
TIG is used to bond non-ferrous metals.
