Invention Grant
- Patent Title: Precipitation hardenable cobalt-nickel base superalloy and article made therefrom
-
Application No.: US17714518Application Date: 2022-04-06
-
Publication No.: US11718897B2Publication Date: 2023-08-08
- Inventor: Stephane Forsik , Alberto Polar-Rosas , Tao Wang , Samuel Kernion , Mario Epler , Ning Zhou
- Applicant: CRS HOLDINGS, LLC
- Applicant Address: US DE Wilmington
- Assignee: CRS HOLDINGS, LLC
- Current Assignee: CRS HOLDINGS, LLC
- Current Assignee Address: US DE Wilmington
- Agency: Dann, Dorfman, Herrell and Skillman, P.C.
- Main IPC: C22C19/07
- IPC: C22C19/07 ; C22C30/00 ; C22C19/05
Abstract:
A precipitation hardenable, cobalt-nickel base superalloy is disclosed. The is characterized by the following weight percent composition.
C
about 0.01 to about 0.15
Cr
about 6.00 to about 15.00
Ni
about 30.00 to about 45.00
W
about 3.00 to about 15.00
Ti
about 0.50 to about 4.00
Al
about 3.00 to about 7.00
Nb
up to about 2.50
Ta
up to about 6.00
Hf
up to about 1.50
Zr
up to about 1.50
B
up to about 0.20
Mo
up to about 2.50
Si
up to about 1.50
The balance of the alloy is cobalt and usual impurities. The alloy provides a novel combination of strength and ductility after long-term exposure to elevated operating temperatures as found in gas turbines and jet engines. A fine-grain steel article made from the alloy is also disclosed. The steel article is also characterized by a continuous surface layer of Al2O3 and Cr2O3 that protects the alloy from oxidation at the elevated operating temperatures.
C
about 0.01 to about 0.15
Cr
about 6.00 to about 15.00
Ni
about 30.00 to about 45.00
W
about 3.00 to about 15.00
Ti
about 0.50 to about 4.00
Al
about 3.00 to about 7.00
Nb
up to about 2.50
Ta
up to about 6.00
Hf
up to about 1.50
Zr
up to about 1.50
B
up to about 0.20
Mo
up to about 2.50
Si
up to about 1.50
The balance of the alloy is cobalt and usual impurities. The alloy provides a novel combination of strength and ductility after long-term exposure to elevated operating temperatures as found in gas turbines and jet engines. A fine-grain steel article made from the alloy is also disclosed. The steel article is also characterized by a continuous surface layer of Al2O3 and Cr2O3 that protects the alloy from oxidation at the elevated operating temperatures.
Public/Granted literature
- US20220380867A1 Precipitation Hardenable Cobalt-Nickel Base Superalloy And Article Made Therefrom Public/Granted day:2022-12-01
Information query
