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A gas tungsten arc-welding operation is performed at a current of 500 A and voltage of 20 V. The melting factor f2 = 0.5, and the unit melting energy for the metal Um = 10 Jmm-3. Calculate the volume of metal welded? (Heat transfer factor is 0.7)

A gas tungsten arc-welding operation is performed at a current of 500 A and voltage of 20 V. The melting factor f2 = 0.5, and the unit melting energy for the metal Um = 10 Jmm-3. Calculate the volume of metal welded? (Heat transfer factor is 0.7) Correct Answer 350mm/sec

Here the volume of the metal welded can be calculated if we know the total heat generation at the weld. This can be calculated if we know the total power required. So here the total power is given as 500*20 = 10000W, hence the rate is given as 0.7*0.5*10000 = 3500J/sec and the volume is given as 3500/10=350mm/sec.

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