Mitsubishi Heavy Industries Limited

Toshiaki Nishio

Nobuyoshi Komai

Masaaki Fujita

Takumi Tokiyoshi

Masaki Honda

Fumitoshi Sakata

Akira Notomi

Takashi Inami

Iwami Ishihara

Fumio Nishi

Takayuki Maeda

Tetsuji Yamaguchi

Hiroyuki Ohyama

Kimihiko Tominaga

Koichi Teshima

Akinori Yamaguchi

Eiji Murakami

Masakazu Matsui

Ryoji Miki

Yoshimi Onitsuka

Yuichi Kojima

A repair welding method according to at least one embodiment is for a member in which a first end and a second end of a parent material are connected by welding and includes: a step of removing a portion including at least a part of a first heat-affected zone of an existing welded portion of the member; and a step of performing repair welding after removing the portion. In a cross-section including the parent material and the existing welded portion, all intersection portions between the first heat-affected zone of the existing welded portion and a second heat-affected zone due to the repair welding have an intersection angle between the first heat-affected zone and the second heat-affected zone of 70° to 110°.

Repair welding method

A powder material for powder plasma build-up welding which exhibits excellent resistance and bending properties comprises C in an amount of 0.06 to 0.15% (% by weight, the same hereinafter), Si in an amount of 0.2 to 1.0%, Mn in an amount of 0.2 to 1.0%, Cr in an amount of 17 to 30%, Nb in an amount of 0.6 to 1.5%, Ni in an amount of not more than 0.5%, and the balance consisting of Fe and unavoidable impurities.

Powder material for powder plasma overlaying and powder plasma overlaying metal

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Nagasaki, Japan

Toshiaki Nishio