Nickel alloy composition with boron and nitrogen

Patent metadata

Field	Value
Publication number	US-11692245-B2
Application number	US-202217694780-A
Country	US
Kind code	B2
Filing date	Mar 15, 2022
Priority date	Mar 19, 2021
Publication date	Jul 4, 2023
Grant date	Jul 4, 2023

Abstract

An alloy composition includes, by weight: 20% to 23% of Cr; 8% to 10% of Mo; 3.15% to 4.15% of Nb+Ta; 0.25% to 1.5% of B; 0.35% to 1.75% of N; and a balance of Ni.

First claim

What is claimed is:

1. An alloy composition comprising, by weight:
20% to 23% of Cr;
8% to 10% of Mo;
3.15% to 4.15% of Nb+Ta;
0.25% to 1.5% of B;
0.6% to 1.75% of N; and
a balance of Ni.

2. The alloy composition as recited in claim 1 , wherein the B is 0.5% to 1.2%.

3. The alloy composition as recited in claim 1 , where the N is 0.7% to 1.6%.

4. The alloy composition as recited in claim 1 , wherein the B is 0.5% to 1.2% and the N is 0.7% to 1.6%.

5. The alloy composition as recited in claim 1 , wherein the B is 0.4% to 0.7%.

6. The alloy composition as recited in claim 1 , wherein the N is 0.6% to 0.9%.

7. The alloy composition as recited in claim 1 , wherein the B is 1.1% to 1.3%.

8. The alloy composition as recited in claim 1 , wherein the N is 1.4% to 1.7%.

9. An article comprising:
an alloy of the following composition, by weight:
20% to 23% of Cr;
8% to 10% of Mo;
3.15% to 4.15% of Nb+Ta;
0.25% to 1.5% of B;
0.35% to 1.75% of N; and
a balance of Ni,
wherein the alloy has a microstructure that includes an acicular phase and a non-acicular phase.

10. The article as recited in claim 9 , wherein the acicular phase is Nb-rich.

11. The article as recited in claim 10 , wherein the acicular phase includes, by weight, at least 25% Nb.

12. The article as recited in claim 9 , wherein the non-acicular phase is Mo-rich.

13. The article as recited in claim 12 , wherein the non-acicular phase incudes, by weight, at least 50% Mo.

14. The article as recited in claim 9 , wherein the acicular phase is Nb-rich and includes, by weight, at least 25% Nb, the non-acicular phase is Mo-rich and incudes, by weight, at least 50% Mo, and microstructure has, by volume, 6% to 10% of the non-acicular phase and 0.5-4% of the acicular phase.

15. The article as recited in claim 9 , wherein the B is 0.5% to 1.2%.

16. The article as recited in claim 9 , where the N is 0.7% to 1.6%.

Assignees

• Raytheon Tech Corp

Inventors

• Vargas Chris
• Busta Carl

Classifications

• B22F3/225 Primary

  by injection molding · CPC title

• C22C19/055 Primary

  with the maximum Cr content being at least 20% but less than 30% · CPC title

• B22F2998/10

  Processes characterised by the sequence of their steps · CPC title