Article and method for forming an article

Patent metadata

Field	Value
Publication number	US-9404388-B2
Application number	US-201414193576-A
Country	US
Kind code	B2
Filing date	Feb 28, 2014
Priority date	Feb 28, 2014
Publication date	Aug 2, 2016
Grant date	Aug 2, 2016

Abstract

An article and a method for forming the article are disclosed. The article comprising a composition, wherein the composition comprises, by weight percent, about 13.7% to about 14.3% chromium (Cr), about 9.0% to about 10.0% cobalt (Co), about 3.5% to about 3.9% aluminum (Al), about 3.4% to about 3.8% titanium (Ti), about 4.0% to about 4.4% tungsten (W), about 1.4% to about 1.7% molybdenum (Mo), about 1.55% to about 1.75% niobium (Nb), about 0.08% to about 0.12% carbon (C), about 0.005% to about 0.040% zirconium (Zr), about 0.010% to about 0.014% boron (B), and balance nickel (Ni) and incidental impurities. The composition is substantially free of tantalum (Ta) and includes a microstructure substantially devoid of Eta phase.

First claim

What is claimed is:

1. An article comprising a composition, wherein the composition comprises, by weight percent:
about 13.7% to about 14.3% chromium (Cr);
about 9.0% to about 10.0% cobalt (Co);
about 3.5% to about 3.9% aluminum (Al);
about 3.4% to about 3.8% titanium (Ti);
about 4.0% to about 4.4% tungsten (W);
about 1.4% to about 1.7% molybdenum (Mo);
about 1.55% to about 1.75% niobium (Nb);
about 0.08% to about 0.12% carbon (C);
about 0.005% to about 0.040% zirconium (Zr);
about 0.010% to about 0.014% boron (B);
balance nickel (Ni) and incidental impurities, and

wherein the composition is substantially free of tantalum (Ta) and the composition includes a microstructure substantially devoid of Eta phase.

2. The article of claim 1 , wherein the microstructure is devoid of Eta phase.

3. The article of claim 1 , wherein the microstructure is devoid of TCP phases.

4. The article of claim 1 , wherein the microstructure is devoid of Eta phase and TCP phases.

5. The article of claim 1 , wherein the composition is directionally solidified.

6. The article of claim 1 , wherein the composition comprises, by weight percent:
about 13.9% to about 14.1% chromium (Cr);
about 9.25% to about 9.75% cobalt (Co);
about 3.6% to about 3.8% aluminum (Al);
about 3.5% to about 3.7% titanium (Ti);
about 4.1% to about 4.3% tungsten (W);
about 1.5% to about 1.6% molybdenum (Mo);
about 1.60% to about 1.70% niobium (Nb);
about 0.09% to about 0.11% carbon (C);
about 0.010% to about 0.030% zirconium (Zr);
about 0.011% to about 0.013% boron (B);
balance nickel (Ni) and incidental impurities.

7. The article of claim 1 , wherein the composition comprises, by weight percent about 14.0% chromium (Cr), about 9.50% cobalt (Co), about 3.7% aluminum (Al), about 3.6% titanium (Ti), about 4.2% tungsten (W), about 1.55% molybdenum (Mo), about 1.65% niobium (Nb), about 0.10% carbon (C), about 0.02% zirconium (Zr), about 0.012% boron (B), and balance nickel (Ni) and incidental impurities.

8. The article of claim 1 , wherein the article is a hot gas path component of a gas turbine or an aviation engine, and wherein the hot gas path component is subjected to temperatures of at least about 2,000° F.

9. The article of claim 8 , wherein the hot gas path component is selected from the group consisting of a blade, a vane, a nozzle, a seal and a stationary shroud.

10. A method for forming an article, comprising:
casting a composition comprising, by weight percent:
about 13.7% to about 14.3% chromium (Cr);
about 9.0% to about 10.0% cobalt (Co);
about 3.5% to about 3.9% aluminum (Al);
about 3.4% to about 3.8% titanium (Ti);
about 4.0% to about 4.4% tungsten (W);
about 1.4% to about 1.7% molybdenum (Mo);
about 1.55% to about 1.75% niobium (Nb);
about 0.08% to about 0.12% carbon (C);
about 0.005% to about 0.040% zirconium (Zr);
about 0.010% to about 0.014% boron (B);
balance nickel (Ni) and incidental impurities, the composition being substantially free of tantalum (Ta);
heat treating the composition to form a heat-treated microstructure;
wherein the heat-treated microstructure is substantially devoid of Eta phase.

11. The method of claim 10 , wherein the heat-treated microstructure is devoid of Eta phase.

12. The method of claim 10 , wherein the heat-treated microstructure is devoid of TCP phases.

13. The method of claim 10 , wherein the heat-treated microstructure is devoid of Eta phase and TCP phases.

14. The method of claim 10 , wherein the composition comprises, by weight percent:
about 13.9% to about 14.1% chromium (Cr);
about 9.25% to about 9.75% cobalt (Co);
about 3.6% to about 3.8% aluminum (Al);
about 3.5% to about 3.7% titanium (Ti);
about 4.1% to about 4.3% tungsten (W);
about 1.5% to about 1.6% molybdenum (Mo);
about 1.60% to about 1.70% niobium (Nb);
about 0.09% to about 0.11% carbon (C);
about 0.010% to about 0.030% zirconium (Zr);
about 0.011% to about 0.013% boron (B);
balance nickel (Ni) and incidental impurities.

15. The method of claim 10 , wherein the composition comprises, by weight percent about 14.0% chromium (Cr), about 9.50% cobalt (Co), about 3.7% aluminum (Al), about 3.6% titanium (Ti), about 4.2% tungsten (W), about 1.55% molybdenum (Mo), about 1.65% niobium (Nb), about 0.10% carbon (C), about 0.02% zirconium (Zr), about 0.012% boron (B), and balance nickel (Ni) and incidental impurities.

16. The method of claim 10 , wherein the article is a hot gas path component of a gas turbine or an aviation engine, and wherein the hot gas path component is subjected to temperatures of at least about 2,000° F.

17. The method of claim 10 , wherein the hot gas path component is selected from the group consisting of a blade, a vane, a nozzle, a seal and a stationary shroud.

18. The method of claim 10 , wherein casting the composition comprises one of ingot casting, investment casting and near net shape casting.

19. The method of claim 18 , wherein casting the composition comprises investment casting.

20. The method of claim 10 , wherein casting the composition includes directionally solidifying the composition.

Assignees

• Gen Electric

Inventors

• Feng Ganjiang
• Brown Mark R
• Arnett Michael Douglas
• Laylock Matthew J

Classifications

• C22F1/10 Primary

  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

• C22C19/056

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

• B22D7/005

  from non-ferrous metals · CPC title

• F01D25/005 Primary

  Selecting particular materials · CPC title