Low-cost Fe—Ni—Cr alloys for high temperature valve applications
First Claim
Patent Images
1. An Fe-Ni-Cr Alloy, consisting essentiality of, in terms of weight percent:
- Al 1 to 3.5Co up to 2Cr 15 to 19.5Cu up to 2Fe 24.09 to 34.89Hf up to 0.3Mn up to 4Mo 0.15 to 2Si up to 0.15Ta up to 1.05Ti 2.8 to 4.3W up to 0.5Zr up to 0.06C 0.02 to 0.15N 0.0001 to 0.007balance Ni,wherein, in terms of atomic percent;
5.9≦
Al Ti Zr Hf Ta≦
10.5,
0.3≦
Al÷
(Al Ti Zr Hf Ta)≦
0.65, and
0.17≦
Cr÷
(Fe Ni Cr Mn)≦
0.23,said alloy being free of Nb and essentially free of V; and
,said alloy comprising γ and
γ
′
phases, wherein the lattice misfit at 870°
C. of the γ and
γ
′
phases is between −
0.135% and 0.064%.
2 Assignments
0 Petitions
Accused Products
Abstract
An Fe—Ni—Cr alloy is composed essentially of, in terms of weight percent: 1 to 3.5 Al, up to 2 Co, 15 to 19.5 Cr, up to 2 Cu, 23 to 40 Fe, up to 0.3 Hf, up to 4 Mn, 0.15 to 2 Mo, up to 0.15 Si, up to 1.05 Ta, 2.8 to 4.3 Ti, up to 0.5 W, up to 0.06 Zr, 0.02 to 0.15 C, 0.0001 to 0.007 N, balance Ni, wherein, in terms of atomic percent: 6.5≦Al Ti Zr Hf Ta≦10, 0.33≦Al÷(Al Ti Zr Hf Ta)≦0.065, 4≦(Fe Cr)÷(Al Ti Zr Hf Ta)≦10, the alloy being essentially free of Nb and V.
73 Citations
25 Claims
-
1. An Fe-Ni-Cr Alloy, consisting essentiality of, in terms of weight percent:
-
Al 1 to 3.5 Co up to 2 Cr 15 to 19.5 Cu up to 2 Fe 24.09 to 34.89 Hf up to 0.3 Mn up to 4 Mo 0.15 to 2 Si up to 0.15 Ta up to 1.05 Ti 2.8 to 4.3 W up to 0.5 Zr up to 0.06 C 0.02 to 0.15 N 0.0001 to 0.007 balance Ni, wherein, in terms of atomic percent;
5.9≦
Al Ti Zr Hf Ta≦
10.5,
0.3≦
Al÷
(Al Ti Zr Hf Ta)≦
0.65, and
0.17≦
Cr÷
(Fe Ni Cr Mn)≦
0.23,said alloy being free of Nb and essentially free of V; and
,said alloy comprising γ and
γ
′
phases, wherein the lattice misfit at 870°
C. of the γ and
γ
′
phases is between −
0.135% and 0.064%.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
-
Specification
-
- Resources
Litigation Campaign Assessment
Thank you for your request. You will receive a custom alert email when the Litigation Campaign Assessment is available.
×
-
Current AssigneeUT-Battelle LLC
-
Original AssigneeUT-Battelle LLC
-
InventorsMuralidharan, Govindarajan
-
Primary Examiner(s)Roe, Jessee
-
Application NumberUS14/307,733Publication NumberTime in Patent Office1,014 DaysField of SearchUS Class Current1/1CPC Class CodesC22C 19/056 with the maximum Cr content...C22C 30/00 Alloys containing less than...C22C 30/02 containing copperF01L 3/02 Selecting particular materi...
