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|1. (WO2017168777) TURBINE BLADE DESIGNING METHOD, TURBINE BLADE MANUFACTURING METHOD, AND TURBINE BLADE|
|Applicants:||MITSUBISHI HEAVY INDUSTRIES, LTD.
|Title:||TURBINE BLADE DESIGNING METHOD, TURBINE BLADE MANUFACTURING METHOD, AND TURBINE BLADE|
Provided is a turbine blade designing method for designing a turbine blade, wherein: correlation data associating heating temperature range, creep strength, and crystal grain size is prepared in advance; and the method is provided with a temperature distribution acquisition step S11 in which temperature distribution data relating to temperature distribution in a heated turbine blade is acquired, a creep strength acquisition step S12 in which creep strength distribution data relating to the distribution of creep strength required of the heated turbine blade is acquired, and a crystal grain size setting step S13 in which, on the basis of the temperature distribution data and the creep strength distribution data, the crystal grain size in a high-temperature site that is in the diffusion creep temperature range for the turbine blade is set to be coarser than a reference crystal grain size used as a reference, and the crystal grain size in a low-temperature site that is in the dislocation creep temperature range for the turbine blade is set to be finer than the reference crystal grain size.