TEMPERATURE ESTIMATION METHOD FOR STRUCTURAL MEMBER AND MAINTENANCE METHOD FOR STRUCTURAL MEMBER

摘要

PROBLEM TO BE SOLVED: To provide the temperature estimation method of a structural member capable of estimating the temperature of a structural member composed of Ni-based heat resistant alloy starting with the moving blade of a gas turbine across a wide temperature range and the maintenance method of the structural member using the temperature estimation method.

SOLUTION: Disclosed is a temperature estimation method for estimating the temperature of a structural member composed of Ni-based heat resistant alloy including: determining an index indicating a relation between the thickness of a degenerated layer formed on the surface layer of the structural member whose γ' phase has been lost and temperature/time; measuring the thickness of the degenerated layer in the structural member; associating the measurement value with the index; and calculating the temperature of the structural member.

COPYRIGHT: (C)2013,JPO&INPIT