US2008101981A1PendingUtilityA1
Ni Based Alloy, a Component, a Gas Turbine Arrangement and Use of Pd in Connection With Such an Alloy
Est. expiryDec 23, 2024(expired)· nominal 20-yr term from priority
C22C 19/056C22C 19/057C22C 19/055C22C 19/03
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Claims
Abstract
The invention concerns a Ni based alloy suitable for single crystalline, directionally solidified or polycrystalline components to be used at high temperatures. The alloy is a γ′/γ alloy and consists of different alloying elements within defined ranges. Among other defined ranges of elements, the alloy contains Pd in a significant amount sufficient to provide the alloy with an improved resistance against hydrogen embrittlement. The invention also concerns a component designed for use as a component in a high temperature environment. Furthermore, the invention concerns a gas turbine arrangement. Moreover, the invention concerns the use of Pd for providing an alloy with improved resistance against hydrogen embrittlement.
Claims
exact text as granted — not AI-modified1 .- 32 . (canceled)
33 . A Ni based γy/γ′ alloy consisting of (in weight %):
0.5-25
Cr
0-25
of one or more elements selected from the group consisting of
Co, Fe and Mn
1-25
of one or more elements selected from the group consisting of
Mo, W, Re and Rh
3-25
of one or more elements selected from the group consisting of
Al, Ti, Ta, Nb, and V
0-10
of one or more elements selected from the group consisting of
Ru, Os, Ir and Pt
<4.0
Pd
0-3
Hf
0-2
Si
0-2
of one or more elements selected from the group consisting of
B, C, N and Zr
0-1
of one or more elements selected from the group consisting of
Y, La, Sc, the actinides and Ce and the other lanthanides
0-2
of one or more additional elements selected from the group
consisting of all elements except for Ni and except for those
referred to above in this table
balance
Ni
wherein the alloy:
is suitable for single crystalline, directionally solidified or polycrystalline components to be used at high temperatures, and
contains Pd in a significant amount sufficient to provide the alloy with an improved resistance against hydrogen embrittlement.
34 . The alloy according to claim 33 , wherein the content of additional elements is less than 1.0. (in weight %).
35 . The alloy according to claim 34 , wherein the content of the additional elements is only at the level of impurities that are normally accepted in alloys for components to be used at high temperatures, such as components used in gas turbines.
36 . The alloy according to claim 33 , wherein (in weight %):
the content of Pd is between 0.05 and 4.0, or the content of Pd is between 0.05 and 2.0, or the content of Pd is between 0.05 and 1.0.
37 . The alloy according to claim 33 , wherein the content of Cr is (in weight %):
between 0.5 and 3.0, or between 0.5 and 6.0, or between 3.0 and 25.0.
38 . The alloy according to claim 33 , wherein (in weight %):
the content of one or more elements selected from the group consisting of: Co, Fe and Mn is greater than 3.0, or the content of Co is greater than 6.0 and less than 25.0.
39 . The alloy according to claim 38 , wherein the content of Co is greater than the sum of the content of Fe plus the content of Mn.
40 . The alloy according to claim 39 , wherein the content of one or more elements selected from the group consisting of: Mo, W, Re and Rh is greater then 3.0 (in weight
41 . The alloy according to claim 40 , wherein the content of W is greater than the content of Mo.
42 . The alloy according to claim 41 , wherein the sum of the content of Re plus the content of Rh is less than 1.0 (in weight %).
43 . The alloy according to claim 42 , wherein the content of Al is greater than 1.0 (in weight %).
44 . The alloy according to claim 43 , wherein the content of Al is greater than 3.0 and less than 10.0 (in weight %).
45 . The alloy according to claim 44 , wherein the molar fraction of Al in the alloy is greater than the molar fraction of the other elements selected from the group consisting of Al, Ti, Ta, Nb, and V.
46 . The alloy according to claim 33 , wherein (in weight %):
the content of one or more elements selected from the group consisting of: Ru, Os, Ir and Pt is greater than 0.01 and less then 5.0, or the content of Hf is greater than 0.05, or the content of Si is greater than 0.02, or the content of one or more elements selected from the group consisting of: B, C, N and Zr is greater than 0.05 and less than 0.8, or the content of one or more elements selected from the group consisting of: Y, La, Sc, actinides, Ce and lanthanides are greater than 0.005, or the content of Ni is greater than 35.0, or the content of Ni is greater than 50.0.
47 . The alloy according to claim 46 , wherein (in weight %):
the volume ratio γ′/γ is greater than 0.4 (40%), or the volume ratio γ′/γ>0.6 (60%).
48 . A high temperature gas turbine component material, comprising:
0.5-25
Cr;
0-25
of one or more elements selected from the group consisting of
Co, Fe and Mn;
1-25
of one or more elements selected from the group consisting of
Mo, W, Re and Rh;
3-25
of one or more elements selected from the group consisting of
Al, Ti, Ta, Nb, and V;
0-10
of one or more elements selected from the group consisting of
Ru, Os, Ir and Pt;
<4.0
Pd;
0-3
Hf;
0-2
Si;
0-2
of one or more elements selected from the group consisting of
B, C, N and Zr;
0-1
of one or more elements selected from the group consisting of
Y, La, Sc, the actinides and Ce and the other lanthanides;
0-2
of one or more additional elements selected from the group
consisting of all elements except for Ni and except for those
referred to above in this table; and
balance
Ni.
49 . The component according to claim 48 , wherein the component is at least part of a guide vane or at least part of a turbine rotor blade.
50 . The component according to claim 49 , wherein the at least part guide vane or at least part rotor blade exhibits improved resistance against hydrogen embrittlement.Join the waitlist — get patent alerts
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