LOCAL HEAT SINK WELDING DEVICE AND WELDING METHOD THEREOF IN WHICH WELDING TORCH IS ALIGNED ON A WELDING SECTION TO WELD A BASE MATERIAL TO THE WELDING SECTION

摘要

The present invention relates to removal part YYO-WON welding equipments and welding methods. Part depyrogenation beginning welding system according to the present invention, the welding is to remove in thermal cycle welder to carry out in part, for improving the mechanical performance of base metal weld seam, by the top for intersecting weld seam between welding welding wire welding torch and the substrate contacted on weld part, it to be used for welding base metal; And cooling unit, for spraying cryogen from welding torch side, he welds cooling t, and the heat affected area at least part region of basis material is formed in the external melt portion of me It is characterized in that it includes: in this way, the symptom of the Carbide Coarsening of unconverted heat affected area and inhibition nuclear plant pressure vessels in welding process, such as, it is used as the material generated without using the material that the method for adding new step in manufacture steel can also generate nuclear energy, and in contrast to this, it can be improved mechanical strength and fracture toughness, such as the mechanical performances such as pressure vessel of equipment. H is traditional.