| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of removing snout material for allowing insertion of a welding tool to a welding preparing region and dispensing with conventional work in which material is restored after the completion of the welding. SOLUTION: A half body of a torus 40, a bridge ring 42 and a nozzle 44 is assembled in a tapered engaging section and clamped together. Welding preparing is performed on the surfaces of the torus to be welded and the nozzle. A welding material 60 is applied along an inside radius and an outside radius by rapidly adhering a root pass for consuming metal firstly, sequential intermediate pass for heaping up matrix material, and finally, for example, the welding material using submerge arc welding. Then, the stress of the nozzle box assembly half body is removed, and it is irradiated with X rays and machine-finished. COPYRIGHT: (C)2004,JPO&NCIPI |
