A continuous weld is to be made around the circumference of a round steel tube of diameter = 6.0\nft, using a submerged arc welding operation under aut
A continuous weld is to be made around the circumference of a round steel tube of diameter = 6.0
\r\nft, using a submerged arc welding operation under automatic control at a voltage of 25 volts and
\r\ncurrent of 300 amps. The tube is slowly rotated under a stationary welding head. The heat transfer
\r\nfactor for SAW is = 0.95 and the assumed melting factor = 0.7. The cross-sectional area of the weld
\r\nbead is 0.12 in2. If the unit melting energy for the steel = 150 Btu/in3, determine (a) the rotational
\r\nspeed of the tube and (b) the time required to complete the weld.
\r\n