Question
Which one of the following welding methods provides the highest heat flux (W/mm2)?
Options :
Oxy-acetylene gas welding
Tungsten inert gas welding
Plasma arc welding
Laser beam welding
Answer :
Laser beam welding
Solution :
| Laser beam welding |
Heat density
(W/cm2) |
Temperature
(℃) |
| Temperature
(℃) |
102 - 103 |
2500 – 3500 |
| Shielded
metal arc
welding |
104 |
>6000 |
| Gas metal
arc welding |
105 |
8000 – 10000 |
| Plasma arc
welding |
106 |
15000 – 30000 |
| Electron
beam
welding |
107
– 108 |
20000 – 30000 |
| Laser beam
welding |
>108 |
>30000 |
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