Mitsubishi Heavy Industries Limited

Mitsubishi Hitachi Power Systems, Ltd.

Koji Tsukimoto

Masahiko Mega

Shuji Tanigawa

Hiroki Komuro

Yasushi Takeuchi

Masashi Kitamura

Takahiro Tachibana

Mitsuo Hasegawa

Masayuki Ota

Shingo Nakahara

Takahisa Hasegawa

Yuki Osame

A method of manufacturing a fabricated object includes forming the fabricated object by laminating metal powder, the fabricated object including an opening portion that communicates with a hollow internal space, mounting a plug in the opening portion, and welding the plug mounted in the opening portion to the fabricated object.

Method of manufacturing fabricated object

A unidirectionally solidified article repair method according to one embodiment includes a step of forming a groove part overlapping only on one of a plurality of crystal grain boundaries in a base material made of a unidirectionally solidified alloy in which the plurality of crystal grain boundaries are aligned in one direction, and a step of forming a welded part having a metal composition similar to that of the base material by a metal used in welding with the base material in the groove part.

Unidirectionally solidified article, turbine rotor blade and unidirectionally solidified article repair method

It is an object to provide a repairing method for a wall member with flow passages capable of reducing the time and the cost required for a partial repairing work on the wall member with flow passages. The repairing method for the wall member with flow passages includes a removal stage of removing a portion of the wall member with flow passages () provided with plural flow passages () between the base member () and the plate member (), the base member welding stage of welding the repairing base member () to the portion removed in the removal stage, a flow passage forming stage of providing plural overlay welds on the repairing base member () and forming the flow passages () between the overlay welded beads (), and a plate member welding stage of welding a repairing plate member () onto surfaces of the plural overlay welded beads ().

Repairing method for wall member with flow passages

In a gas-turbine-stator-vane insert removing device with which welding metal that connects an insert collar, which protrudes outward from an outer circumferential surface of an insert, and a stator-vane-outer-shroud non-gas path surface, which surrounds the periphery of the insert collar, is removed by means of an arc discharge repeated at a short cycle between an electrode and a gas-turbine stator vane, a bottom surface of the electrode has the same plan-view shape as a plan-view shape of the welding metal.

Gas-turbine-stator-vane insert removing device and method of removing gas-turbine-stator-vane insert

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Tokyo, Japan

Koji Tsukimoto