MANUFACTURING PROCESS OF Ni BASED SUPERALLOY MEMBER, BOILER TUBE, COMBUSTOR LINER, GAS TURBINE BLADE, AND GAS TURBINE DISK
First Claim
1. A manufacturing process of a Ni based superalloy member comprising:
- a working step for working the Ni based superalloy softening material into a desired shape, wherein the composition of the Ni based superalloy contains, in mass %, 10% or more and 25% or less of Cr, 30% or less of Co, 3% or more and 9% or less of the total of Ti, Nb and Ta, 1% or more and 6% or less of Al, 10% or less of Fe, 10% or less of Mo, 8% or less of W, 0.03% or less of B, 0.1% or less of C, 0.08% or less of Zr, 2.0% or less of Hf, and 5.0% or less of Re, with the balance including Ni and inevitable impurities,vickers hardness at the room temperature of the Ni based superalloy softening material is 400 or less, 0.2% proof stress at 900°
C. is 250 MPa or less, and a solvus of the gamma prime phase is 1,050°
C. or above; and
a solution-aging step for obtaining a Ni based superalloy member by performing a solution treatment for solid-dissolving a gamma prime incoherent phase and an aging treatment for re-precipitating a gamma prime coherent phase after the working step.
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Accused Products
Abstract
To provide a manufacturing process of a Ni based superalloy and a member of the Ni based superalloy which achieves both of excellent workability in a manufacturing step of the Ni based superalloy of the precipitation strengthening type which contains much amount of the gamma prime phase and excellent high temperature strength of the Ni based superalloy.
The manufacturing process of a Ni based superalloy includes a step for working the Ni based superalloy softening material into a desired shape and a solution-aging step for obtaining a Ni based superalloy member.
The composition of the Ni based superalloy contains, in mass %, 10% or more and 25% or less of Cr, 30% or less of Co, 3% or more and 9% or less of the total of Ti, Nb and Ta, 1% or more and 6% or less of Al, 10% or less of Fe, 10% or less of Mo, 8% or less of W, 0.03% or less of B, 0.1% or less of C, 0.08% or less of Zr, 2.0% or less of Hf, and 5.0% or less of Re, with the balance including Ni and inevitable impurities,
vickers hardness at the room temperature of the Ni based superalloy softening material is 400 or less, 0.2% proof stress at 900° C. is 250 MPa or less, and a solvus of the gamma prime phase is 1,050° C. or above.
The solution-aging step for obtaining a Ni based superalloy member by performing a solution treatment for solid-dissolving a gamma prime incoherent phase and an aging treatment for re-precipitating a gamma prime coherent phase after the working step.
3 Citations
6 Claims
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1. A manufacturing process of a Ni based superalloy member comprising:
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a working step for working the Ni based superalloy softening material into a desired shape, wherein the composition of the Ni based superalloy contains, in mass %, 10% or more and 25% or less of Cr, 30% or less of Co, 3% or more and 9% or less of the total of Ti, Nb and Ta, 1% or more and 6% or less of Al, 10% or less of Fe, 10% or less of Mo, 8% or less of W, 0.03% or less of B, 0.1% or less of C, 0.08% or less of Zr, 2.0% or less of Hf, and 5.0% or less of Re, with the balance including Ni and inevitable impurities, vickers hardness at the room temperature of the Ni based superalloy softening material is 400 or less, 0.2% proof stress at 900°
C. is 250 MPa or less, and a solvus of the gamma prime phase is 1,050°
C. or above; anda solution-aging step for obtaining a Ni based superalloy member by performing a solution treatment for solid-dissolving a gamma prime incoherent phase and an aging treatment for re-precipitating a gamma prime coherent phase after the working step. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification
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- Resources
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Current AssigneeMitsubishi Power Limited (Mitsubishi Heavy Industries, Ltd.)
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Original Assigneemitsubishi hitachi power systems, ltd. (Mitsubishi Heavy Industries, Ltd.)
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InventorsOta, Atsuo, Imano, Shinya, Kamoshida, Hironori
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Application NumberUS16/725,308Publication NumberTime in Patent OfficeDaysField of SearchUS Class CurrentCPC Class CodesC22C 19/056 with the maximum Cr content...C22F 1/10 of nickel or cobalt or allo...F01D 5/28 Selecting particular materi...F23R 3/002 Wall structures F23R3/02 an...
