Nickel based superalloy with high oxidation resistance, high corrosion resistance and good processability

Patent metadata

Field	Value
Publication number	US-2023407439-A1
Application number	US-202118035746-A
Country	US
Kind code	A1
Filing date	Oct 19, 2021
Priority date	Nov 18, 2020
Publication date	Dec 21, 2023
Grant date	—

Abstract

Nickel based super alloy, which includes at least, (in wt %): Iron (Fe) 1.5%-6.5% especially 3.5%-5.5%; Chrome (Cr) 12.0%-14.0%; Molybdenum (Mo) 1.0%-2.0%; Wolfram (W) 2.0%-5.0%; Aluminum (Al) 5.2%-5.8%; Tantalum (Ta) 5.0%-7.0%; Hafnium (Hf) 1.2%-1.8%; Silicon (Si) 0.005%-0.4%; Carbon (C) 0.005%-0.1%; Nickel (Ni), optionally Cobalt (Co) 0.0%-5.0%; especially at least 1.0 wt % Cobalt (CO); Boron (B) >0.0%-0.02%; especially maximum 0.005%; Zirconium (Zr) >0.0%-0.05%; especially maximum 0.01% 0-0.05%; reactive element(s), especially Yttrium (Y), Cerium (Ce), Dysprosium (Dy), and/or Lanthanum (La).

First claim

1 .- 28 . (canceled)

29 . A Nickel based super alloy, which comprises at least, especially consists of (in wt %):

Iron (Fe)
1.5-6.5, especially 2.5-4.5,

Chromium (Cr)
12.0-14.0,

Molybdenum (Mo)
1.0-2.0, especially 1.1-1.6,

Wolfram (W)
2.0-5.0, especially 2.5-4.0,

Aluminum (Al)
5.2-5.8,

Tantalum (Ta)
5.0-7.0, especially 6.0-7.0,

Hafnium (Hf)
1.2-1.8,

Nickel (Ni),

optionally

Cobalt (Co)
0.0-5.0, especially 0.0-4.0,

Silicon (Si)
0.005-0.4  

Carbon (C)
0.005-0.1  

Boron (B)
>0.0-0.02, especially maximum 0.005,

Zirconium (Zr)
>0.0-0.05, especially maximum 0.01,

0-0.05
reactive element(s),

especially Yttrium (Y), Cerium (Ce),

Dysprosium (Dy), and/or Lanthanum (La).

30 . The Alloy according to claim 29 , which comprises
no Cobalt (Co).

31 . The Alloy according to claim 29 , which comprises
at least 1 wt % Cobalt (Co), especially at least 2.5 wt % cobalt (Co).

32 . The Alloy according to claim 29 , which comprises
at least 0.005 wt % Boron (B).

33 . The Alloy according to claim 29 , which comprises
maximum 0.02 wt % Boron (B), especially maximum 0.015 wt % Boron (B), very especially maximum 0.005 wt % Boron (B).

34 . The Alloy according to claim 29 ,
which contains no boron (B).

35 . The Alloy according to claim 29 , which comprises
at least 0.005 wt % Zirconium (Zr).

36 . The Alloy according to claim 29 , which comprises
at least 0.005% Carbon (C), especially at least 0.03% Carbon (C).

37 . The Alloy according to claim 29 , which comprises
maximum 0.1% Carbon (C), especially maximum 0.07% Carbon (C), very especially maximum 0.03% Carbon (C).

38 . The Alloy according to claim 29 , wherein the alloy comprises:
Ni-3Co-4Fe-12.5Cr-1.5Mo-3.5W-5.6Al-6Ta-1.5Hf-0.07C-0.015B-0.01Zr.

39 . The Alloy according to claim 29 , wherein the alloy comprises:
Ni-3Co-4Fe-12.5Cr-1.3Mo-3W-5.4Al-6.5Ta-1.5Hf-0.25Si.

40 . The Alloy according to claim 29 , wherein the alloy comprises
no Silicon (Si).

41 . The Alloy according to claim 29 , wherein the alloy comprises
no Carbon (C), no Boron (B) and/or no Zirconium (Zr).

42 . The Alloy according to claim 29 , wherein the alloy comprises
Silicon (Si).

43 . The Alloy according to claim 29 , wherein the alloy comprises
Carbon (C), Boron (B) and/or Zirconium (Zr).

44 . A component, especially which is a component for a gas turbine,
which is made of an alloy according to claim 29 ,

45 . The component according to claim 44 ,
which has a columnar structure (DS) or which has a single crystal structure (SX).

46 . The component according to claim 44 ,
which has a polycrystalline structure (CC).

Assignees

• Siemens Energy Global Gmbh & Co Kg

Inventors

• Hasselqvist Magnus
• Chen Zhe
• Gustafsson David
• Palmert Frans

Classifications

• C22C19/056 Primary

  with the maximum Cr content being at least 10% but less than 20% · CPC title

• C22F1/10

  of nickel or cobalt or alloys based thereon · CPC title

• F01D5/28

  Selecting particular materials; {Particular measures relating thereto;} Measures against erosion or corrosion · CPC title

• F01D25/005

  Selecting particular materials · CPC title

• F01D25/007

  Preventing corrosion · CPC title