DIRECT RESISTANCE HEATING METHOD.

摘要

A direct resistance heating method includes placing a first electrode and a second electrode on a plate-shaped workpiece such that the first electrodes and the second electrode extend across the workpiece in a direction substantially perpendicular to a center line of a heating target region of the workpiece, the center line connecting a middle portion of one side of the heating target region and a middle portion of the other side of the heating target region; and moving at least one of the first electrode and the second electrode along the center line while applying electric current between the first electrode and the second electrode.