Mitsubishi Heavy Industries Limited

Yasuhiro Ukeguchi

Fujimitsu Masuyama

Nobuyoshi Komai

Fumio Nishi

A welding method and a welded joint for high strength, temperature resistant steels produce the same strength as the base metal in the welded joint, thereby resolving strength problems in the heat affected area by making a simple change to the welding method. Additionally, this advantage is extended to high strength ferrite heat resistant steels by providing a multi-pass buildup welding method for such high strength ferrite heat resistant steels. A multi-layered capfusion area extends past the heat affected areathat lies outside grooveand the surface area of the foregoing extension that is required to impart the same level of creep strength as is inherent in the base metal is based on the relationship between the groove width and the base metal thickness shown as hatched area in FIG.(B).

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Nagasaki, Japan

Yasuhiro Ukeguchi