Abstract
The heating and cooling curve of Magnetically Impelled Arc Butt Welding of steel pipe were calculated by one dimensional heat flow and compared with the measured data. The swelling shape of welded joint was also calculated with results of temperature distribution of pipe. The measured heating and cooling curve corresponded to the calculated one at η=0.72, k=5.64 mm2/s. The time that the temperature at l mm position from the pipe end was heated to 1200°C corresponded to the arc time of the optimum welding conditions.
