Hitachi, Ltd.

Hitachi Engineering Services Co., Ltd.

Mitsubishi Hitachi Power Systems, Ltd.

Yuuji Adachi

Kazuhiro Suzuki

Yutaka Suzuki

Tetsuya Matsui

Masahiro Koike

Mitsuru Odakura

Kojirou Kodaira

Kenji Kumasaka

Katsumi Isaka

Kenji Tayama

An eddy current testing method for a turbine rotor including a disc, a plurality of turbine blades disposed along the periphery of the disc, and a plurality of pins for joining a blade fork portion formed on each of the plurality of turbine blades to a disc fork portion formed on the disc, the method including inserting a probe having an eddy current testing sensor into a hole formed through the disc fork portion and the blade fork portion by pulling out one of the plurality of pins in a state that the blade fork portion is still inserted into the disc fork portion; and performing eddy current testing for at least part of an internal surface of the hole by using the probe.

Eddy current testing apparatus and eddy current testing method

An ultrasonic testing apparatus for a turbine fork of a turbine blade joined to a turbine disc, comprising:

Ultrasonic testing apparatus for turbine forks and method thereof

The eddy current testing apparatus includes a probe having an eddy current testing sensor including a pair of eddy current testing coils. The apparatus also includes an eddy current testing flaw detector inputting detection signals from the eddy current testing sensor. The diameter of a magnetic core used in each of the pair of eddy current testing coils is within the range of 0.1 mm to 0.5 mm.

Eddy current testing method

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Hitachi, Japan

Yuuji Adachi