TURBINE BLADE, GAS TURBINE, INTERMEDIATE PRODUCT OF TURBINE BLADE, AND METHOD OF MANUFACTURING TURBINE BLADE

摘要

Provided are a turbine blade, a gas turbine, an intermediate product of the turbine blade, and a method of manufacturing the turbine blade. This turbine blade has a blade body (51) having hollow shape, cavities (52, 53, 54) provided inside the blade body (51), and a cooling passage (55) that opens from the cavities (52, 53, 54) to the rear end portion of the blade body (51). The cooling passage (55) includes: a first passage (81) provided on the third cavity (54) side and having a width that becomes narrower from the third cavity (54) side toward the rear end portion of the blade body (51); and a second passage (82) provided on the rear end portion side of the blade body (51) and having a width that is constant from the third cavity (54) side toward the rear end portion of the blade body (51).