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Flashcards in Welding Deck (6)
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1
Q

How is gas welding achieved?

A

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.

2
Q

How is spot welding achieved?

A

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.

3
Q

What type of welding is spot welding?

A

It’s called resistance welding.

4
Q

How is metal inert gas (MIG) welding achieved?

A

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.

5
Q

How is tungsten inert gas (TIG) welding achieved?

A

It is achieved in the same way as MIG, only the electrode does not melt.

6
Q

What is the difference between MIG and TIG welding?

A

MIG is used in school to bond steels.

TIG is used to bond non-ferrous metals.