TURBINE MEMBER TEMPERATURE ESTIMATION METHOD

摘要

PROBLEM TO BE SOLVED: To provide a turbine member temperature estimation method capable of accurately estimating a metal temperature even if the metal temperature is low.SOLUTION: A temperature estimation method comprises: detecting γ' phases contained in a turbine member before heating; deriving before-heating particle size distribution data having first distribution data indicating that the number of the γ' phases at a first particle size is the largest and second distribution data indicating that the number of the γ' phases at a second particle size larger than the first particle size is the largest, and showing a relation between the particle size of the γ' phases before heating and the number of the γ' phases at the particle size per unit area on the basis of a detection result before heating; detecting the γ' phases contained in the turbine member after heating; deriving after-heating particle size distribution data showing a relation between the particle size of the γ' phases after heating and the number of the γ' phases at the particle size per unit area on the basis of a detection result after heating; comparing the before-heating particle size distribution data and the after-heating particle size distribution data; and estimating a temperature of the turbine member after heating on the basis of a comparison result.