Direction: A weld is made using MIG welding process with the following welding parameters:
Current: 200 A: Voltage: 25 V; Welding speed: 18 cm/min; Wire diameter: 1.2 mm; Wire feed rate: 4 m/min. Thermal efficiency of the process: 65%
-
The heat input per unit length of the weld in kJ/cm is
-
- 0.18
- 0.28
- 10.83
- 16.66
Correct Option: C
Current = 200A
Voltage = 25 V
dw = 1.2 mm
Fr = 4 m/min
= 4000 mm/min
V = 18 cm/min
= 180 mm/min.
ηTh= 65%
Heat Input per unit length
| = | = | = 10.833 kJ/cm | ||
| speed | 18/60 |
