Mitsubishi Hitachi Power Systems, Ltd.

Naoyuki Umezu

Hiroharu Oyama

Takumi Matsumura

Hidetaka Haraguchi

Kohei Hatano

Yasuo Matsunami

Shuhei Kuroki

Motonari Machida

A heating step, in which a stainless member is heated to a temperature within or above a heating phase-transformation temperature range (Ar) in which the stainless member is phase-transformed, is executed. A cooling step in which the stainless member heated in the heating step is cooled to a temperature below a cooling phase-transformation temperature range (Mr) in which the stainless member is phase-transformed, is executed. In the cooling step, cooling of the stainless member is suppressed in a control temperature range including the cooling phase-transformation temperature range (Mr).

Method for heat treatment of stainless member, and method for producing forged stainless product

A method of manufacturing a turbine blade, the method comprising forming a forging by forging stainless steel; heat treating the forging; and cooling the forging after the heat treatment; wherein in the heat treatment and the cooling, a plurality of the forgings are arranged in alignment, and adjacent forgings of the plurality of forgings are disposed so that at least respective portions of portions of the adjacent forgings corresponding to a region from a portion corresponding to a platform of a turbine blade to a center in a longitudinal direction of the turbine blade face each other and warm each other via radiant heat.

Turbine blade manufacturing method

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Tokyo, Japan

Naoyuki Umezu