Study on the Repair Welding Technology In Shaped Roll for Outlet Flange

The crack appears frequently in using the shaped roll for outlet flange. A kind of repair welding technology is advanced in this paper, which is welded from center to edge and in multi-layer and multi-short-pass. The weld bead is hammered. Then the internal stress of the repaired area is in non-restrain state all along. The characteristics of this repair welding technology is analysied.