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# Determine a the rate of heat generation at the weld and b the volume rate of metalwelded for welding low carbon steel plates by two welding processes the first is shielded metal

Determine (a) the rate of heat generation at the weld and (b) the volume rate of metal welded for welding low-carbon steel plates by two welding processes; the first is shielded metal arc-welding operation performed at a voltage = 25 volts and a current = 150 amps. The heat transfer factor = 0.90, and the melting factor = 0.75. The second is gas metal arc welding performed at a welding voltage = 25 volts, current = 200 amps, and heat transfer factor = 0.90, and the melting factor = 0.627. The melting temperature of low-carbon steel = 1487?C, and the unit melting energy can be determined by the methods you learnt in class. Hence, determine the travel speed required for both cases of the weld bead = 32.25 mm2. Assume the weld bead is all from the filler metal. Comment on your answer by comparing all results in a, b and c and explaining the differences between all values in view of the process description. [15 marks]

Jun 21 2020 View more View Less

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