Problem NO: 6

A flux-cored arc-welding process is used to join two low alloy steel plates at a 90° angle using an\noutside fillet weld. The steel plates are ½ in thi

A flux-cored arc-welding process is used to join two low alloy steel plates at a 90° angle using an

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outside fillet weld. The steel plates are ½ in thick. The weld bead consists of 55% metal from the

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electrode and the remaining 45% from the steel plates. The melting factor of the steel is 0.65 and

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the heat transfer factor is 0.90. The welding current is 75 amps and the voltage is 16 volts. The

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velocity of the welding head is 40 in/min. The diameter of the electrode is 0.10 in. There is a core of

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flux running through the center of the electrode that has a diameter of 0.05 in and contains flux

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(compounds that do not become part of the weld bead). (a) What is the cross-sectional area of the

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weld bead? (b) How fast must the electrode be fed into the workpiece?

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