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A welding operation is being performed with voltage = 30 V and current = 100 A. The crosssectional area of the weld bead is 20 mm2. The work-piece and filler are of titanium for which of the specific energy of melting is 14 J/mm³.
Assuming a thermal efficiency of the welding process 70%, the welding speed (in mm/s) is (correct to two decimal places).
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- 5.7
- 2.1
- 33.9
- 7.5
Correct Option: D
Voltage = 30 V,
I = 100 A Area = 30 mm2
Specific Energy = 14 J/mm3
ηth = 70%
welding speed V =?
Power = V × I = 30 × 100 = 300 J/s
| Specific Energy = | |
| A × V |
Transferred Power = 0.7 × 3000 = 2100 J/S
| V = | |
| 14 × 20 |
V = 7.5mm/s
