Ishikawajima-harima Heavy Industries Co., Ltd.

Ishikawajima Inspection & Instrumentation Co., Ltd

Hiroyuki Miyazawa

Akihiro Sato

Yasuhiro Aoki

Kiyofumi Ishikawa

Hiroto Yamaoka

A recess formed in close contact with a thin-walled portionof a workpiece to store molten metal at a surfaced portion, a jigmanufactured from a material with a higher heat-resisting temperature than that of the molten metal and a satisfactorily large heat capacity, a step (A) wherein the jig is installed on the workpiece, a preheating step (B) in which the workpiece and the jig are preheated to a predetermined temperature under the condition that jigis installed, a build up welding step (C) for build up welding the thin-walled portion of the workpiece and forming weld beads at surfaced portion, and a jig-removing step (D) for removing the jig after weld beads solidify completely.

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Yokohama, Japan

Hiroyuki Miyazawa