Metal Arc Gas Shielded Welding (MAGS)

Question 1

What is metal arc gas shielded welding also known as?

Answer 1

Also known as Metal Inert Gas Welding (MIG)

Question 2

What shields the weld from oxidation in the case of MIG and MAGS?

Answer 2

an inert gas such as Argon or helium (MIG) or a mixture of gases (MAGS) shields the weld from oxidation.

Question 3

How is MAGS a semi-automated process?

Answer 3

The filler wire is fed continuously into the weld area by a wire feed mechanism through a torch or gun

Question 4

What does the protective coating on filler wire protect it from?

Answer 4

corrosion

Question 5

Why can MAGS be used on both light sheet metal and on heavy plates?

Answer 5

as the wire feed rate and gas flow rate can be set

Question 6

Why is MAGS often performed by robots in industry?

Answer 6

Because wire feed is continuous, and no slag is formed, MAGS welding is often performed by robots in industry.

Question 7

What sort of power source is used in MAGS welding?

Answer 7

A D.C. power source

Question 8

Give some pros and cons of MAGS welding

Answer 8

It is very fast welding, clean welds with no slag.

expensive equipment

Question 9

List the steps of MAGS welding (4)

Answer 9

1. The operator holds a gun which feeds a bare consumable filler wire electrode from a reel.
2. The gun issues gas over the weld area to prevent it oxidising.
3. MIG welding uses an inert gas such as argon.
4. MAGS welding uses a mixture of gases e.g. argon and carbon dioxide

Question 10

What must be labelled on a diagram for MAGS welding?

Answer 10

Label gas supply, wire feed mechanism, wire reel, gun,