TURBINE ROTOR BLADE AND MEMBER OF TURBINE ROTOR BLADE
In a manufacturing method of a turbine rotor blade using an Ni-based forged alloy, provided is a turbine rotor blade and a member of a turbine rotor blade having an excellent workability and a high degree of freedom in the design of a cooling structure. The turbine rotor blade includes at least two members, including a first member and a second member, and each member is provided with cooling structural parts acting as cooling flow passages. The turbine rotor blade has a joint that integrates the first member and the second member, wherein the joint has a forged structure and the whole turbine rotor blade including the joint has a uniform forged structure.
1 . A turbine rotor blade made of a Ni-based forged material, wherein:
the turbine rotor blade is composed of at least two members comprising a first member and a second member,
each of the at least two members is provided with cooling structural parts acting as cooling flow passages,
the turbine rotor blade has a joint integrating the first member and the second member, and
the joint has a forged structure and an entirety of the turbine rotor blade including the joint has a uniform forged structure.
2 . The turbine rotor blade according to claim 1 , wherein the cooling structural parts include a serpentine flow passage inside the turbine rotor blade.
3 . The turbine rotor blade according to claim 1 , wherein the cooling structural parts include a hole at a side face of the turbine rotor blade.
4 . The turbine rotor blade according to claim 1 , wherein the turbine rotor blade includes 10 mol % or more and 40 mol % or less of γ′ phase at equal to or more 1050° C.
5 . The turbine rotor blade according to claim 1 , wherein the turbine rotor blade after solid solution and aging treatment process includes not less than 30 mol % of γ′ phase that coherent with a matrix phase at equal to or higher than 700° C.
6 . The turbine rotor blade according to claim 1 , wherein the at least two members act as a blade part and an apex part of the turbine rotor blade.
7 . A member of a turbine rotor blade made of a Ni-based forged material, wherein:
the turbine rotor blade is composed of at least two members made of a Ni-based softening material,
the softening material has a dual structure comprising a γ′ phase and a γ′ incoherent phase,
a raw material of the softening material includes 10 mol % or more and 40 mol % or less of γ′ phase at equal to or higher than 1050° C., and
a vickers hardness of the softening material is equal to 350 Hv or less.
8 . The member of a turbine rotor blade according to claim 7 , wherein the at least two members of the turbine rotor blade are provided with joining parts to be joints of respective members.
9 . The member of a turbine rotor blade according to claim 8 , wherein the joining parts to be the joints of the respective members of the turbine rotor blade are protrusions formed at ends of members.
10 . The member of a turbine rotor blade according to claim 7 , wherein the at least two members of the turbine rotor blade have cooling structural parts acting as cooling flow passages.
11 . The member of a turbine rotor blade according to claim 10 , wherein the cooling structural parts form a serpentine flow passage inside the turbine rotor blade.
12 . The member of a turbine rotor blade according to claim 10 , wherein the cooling structural parts include a hole at a side face of the turbine rotor blade.
13 . The member of a turbine rotor blade according to claim 10 , wherein the cooling flow passages are formed by joining the at least two members.
14 . The member of a turbine rotor blade according to claim 7 , wherein the at least two members of the turbine rotor blade act as a blade part and an apex part of the turbine rotor blade.