REPAIR METHOD FOR CRUSHER ROLL USING BUILDUP WELDING

摘要

PURPOSE:To shorten a construction period and to reduce the cost by welding the welding metal having a toughness as well as forming numerous grooves on the roll shell part to be repaired, then by welding the upperlaying weld metal for repair on the whole face of the roll shell part. CONSTITUTION:Numerous grooves 6 are formed in the direction crossing with a repair welding direction via an arc air gouging on the surface of a wear roll shell part 1. An anchor bead is then formed by performing a filling-up welding with the soft welding metal having toughness on this groove 6. The upperlaying repair weld 7 is made by performing the buildup welding of a hard upperlaying metal continuously in the direction (a) on the whole face of the roll shell part 1 including the anchor bead. In this method, a resin-forcing and mooring actions are performed with the cross combination of the upperlaying weld repair 7 and anchor bead. Consequently the repair omitting machining is enabled and the shortening in the construction period and reduction in the cost are enabled.