Nickel-base alloy and articles

• US 10,287,655 B2
• Filed: 08/16/2017
• Issued: 05/14/2019
• Est. Priority Date: 06/01/2011
• Status: Active Grant

• Current Assignee: ATI Properties LLC
• Original Assignee: ATI Properties LLC
• Inventors: Forbes Jones, Robin M., Rock, Christopher D.
• Primary Examiner(s): Roe, Jessee R
• Application Number:
  US15/678,527
• Publication Number:
  US 20170349977A1
• Time in Patent Office: 636 Days
• CPC Class Codes: B05D 3/007 After-treatment
• CPC Class Codes: B05D 7/52 Two layers
• CPC Class Codes: B21D 22/022 by heating the blank or stamping associated with heat treatment C21D takes precedence
• CPC Class Codes: B21J 1/06 Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations B21J5/063 takes precedence
• CPC Class Codes: C08G 18/10 Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
• CPC Class Codes: C08G 18/222 metal compounds not provided for in groups C08G18/225 - C08G18/26
• CPC Class Codes: C08G 18/3206 aliphatic
• CPC Class Codes: C08G 18/4841 containing oxyethylene end groups
• CPC Class Codes: C08G 18/7657 containing two or more aromatic rings
• CPC Class Codes: C08G 18/7671 containing only one alkylene bisphenyl group
• CPC Class Codes: C08J 2375/04 Polyurethanes
• CPC Class Codes: C08J 2375/08 from polyethers
• CPC Class Codes: C08J 9/32 from compositions containing microballoons, e.g. syntactic foams
• CPC Class Codes: C08K 7/28 Glass
• CPC Class Codes: C08L 75/04 Polyurethanes
• CPC Class Codes: C09D 175/08 from polyethers
• CPC Class Codes: C22C 19/05 with chromium
• CPC Class Codes: C22C 19/058 without Mo and W
• CPC Class Codes: C22F 1/10 of nickel or cobalt or alloys based thereon
• CPC Class Codes: F16L 59/14 Arrangements for the insulation of pipes or pipe systems F16L59/02 - F16L59/12 take precedence

Abstract

An alloy is disclosed comprising up to 0.05 weight percent carbon, 27.0 to 31.0 weight percent chromium, up to 0.5 weight percent copper, 7.0 to 11.0 weight percent iron, up to 0.5 weight percent manganese, up to 0.015 weight percent sulfur, up to 0.5 weight percent silicon, at least 58 weight percent nickel, and incidental impurities, wherein the alloy exhibits an ASTM grain size of 3.0 to 9.0, exhibits a uniform grain size distribution, includes intergranular M₂₃C₆ carbide precipitates uniformly distributed on grain boundaries, and includes minimal or no intragranular M₂₃C₆ carbide precipitates. Articles of manufacture including the alloy also are described.

Claims

1. An alloy comprising:

up to 0.05 weight percent carbon;

27.0 to 31.0 weight percent chromium;

up to 0.5 weight percent copper;

7.0 to 11.0 weight percent iron;

up to 0.5 weight percent manganese;

up to 0.015 weight percent sulfur;

up to 0.5 weight percent silicon;

at least 58 weight percent nickel; and

incidental impurities;

wherein the alloy exhibits an ASTM grain size of 3.0 to 9.0, exhibits a uniform grain size distribution, includes intergranular M₂₃C₆ carbide precipitates uniformly distributed on grain boundaries, and includes minimal or no intragranular M₂₃C₆ carbide precipitates.

2. The alloy of claim 1, wherein the alloy exhibits an ASTM grain size of 3.0 to 8.0.

3. The alloy of claim 1, wherein the alloy exhibits an ASTM grain size of 3.5 to 7.5.

4. The alloy of claim 1, wherein the alloy exhibits an ASTM grain size of 4.5 to 6.5.

5. The alloy of claim 1, wherein the alloy exhibits an ASTM grain size of 3.0 to 6.0.

6. The alloy of claim 1, wherein the alloy lacks intragranular M₂₃C₆ carbide precipitates.

7. The alloy of claim 1, wherein chemically etched specimens of the alloy lack metallographically observable intragranular M₂₃C₆ carbide precipitates when observed at 500×

magnification by scanning electron microscopy.

8. The alloy of claim 1, wherein chemically etched specimens of the alloy include uniformly distributed intergranular M₂₃C₆ carbide precipitates on grain boundaries when observed at 500×

magnification by scanning electron microscopy.

9. The alloy of claim 1, wherein the alloy lacks stringers of grain boundary precipitates.

10. The alloy of claim 1 comprising:

up to 0.05 weight percent carbon;

28.0 to 30.0 weight percent chromium;

up to 0.25 weight percent copper;

8.0 to 10.0 weight percent iron;

up to 0.25 weight percent manganese;

up to 0.010 weight percent sulfur;

up to 0.25 weight percent silicon;

at least 58 weight percent nickel; and

incidental impurities.

11. The alloy of claim 10, wherein the alloy lacks intragranular M₂₃C₆ carbide precipitates.

12. The alloy of claim 10, wherein chemically etched specimens of the alloy lack metallographically observable intragranular M₂₃C₆ carbide precipitates when observed at 500×

magnification by scanning electron microscopy.

13. The alloy of claim 10, wherein chemically etched specimens of the alloy include uniformly distributed intergranular M₂₃C₆ carbide precipitates on grain boundaries when observed at 500×

magnification by scanning electron microscopy.

14. The alloy of claim 10, wherein the alloy lacks stringers of grain boundary precipitates.

15. An alloy comprising:

up to 0.05 weight percent carbon;

27.0 to 31.0 weight percent chromium;

up to 0.5 weight percent copper;

7.0 to 11.0 weight percent iron;

up to 0.5 weight percent manganese;

up to 0.015 weight percent sulfur;

up to 0.5 weight percent silicon;

at least 58 weight percent nickel; and

incidental impurities;

wherein the alloy exhibits an ASTM grain size of 3.0 to 9.0 and a uniform grain size distribution;

wherein chemically etched specimens of the alloy include uniformly distributed intergranular M₂₃C₆ carbide precipitates on grain boundaries when observed at 500×

magnification by scanning electron microscopy; and

wherein chemically etched specimens of the alloy lack metallographically observable intragranular M₂₃C₆ carbide precipitates when observed at 500×

magnification by scanning electron microscopy.

16. The alloy of claim 15 comprising:

up to 0.05 weight percent carbon;

28.0 to 30.0 weight percent chromium;

up to 0.25 weight percent copper;

8.0 to 10.0 weight percent iron;

up to 0.25 weight percent manganese;

up to 0.010 weight percent sulfur;

up to 0.25 weight percent silicon;

at least 58 weight percent nickel; and

incidental impurities.

17. An article of manufacture including an alloy comprising:

up to 0.05 weight percent carbon;

27.0 to 31.0 weight percent chromium;

up to 0.5 weight percent copper;

7.0 to 11.0 weight percent iron;

up to 0.5 weight percent manganese;

up to 0.015 weight percent sulfur;

up to 0.5 weight percent silicon;

at least 58 weight percent nickel; and

incidental impurities;

wherein the alloy exhibits an ASTM grain size of 3.0 to 9.0, exhibits a uniform grain size distribution, includes intergranular M₂₃C₆ carbide precipitates uniformly distributed on grain boundaries, and includes minimal or no intragranular M₂₃C₆ carbide precipitates.

18. The article of manufacture of claim 17, wherein the article is one of a forged article and a rolled article.

19. The article of manufacture of claim 18, wherein the article is selected from a rod, a bar, a round bar, a round rod, a rectangular bar, a rectangular rod, a hexagonal bar, a hexagonal rod, a forged rectangular long product, a rolled rectangular long product, a tube, a forged tube, and a rotary forged tube.

20. The article of manufacture of claim 18, wherein the alloy comprises:

up to 0.05 weight percent carbon;

28.0 to 30.0 weight percent chromium;

up to 0.25 weight percent copper;

8.0 to 10.0 weight percent iron;

up to 0.25 weight percent manganese;

up to 0.010 weight percent sulfur;

up to 0.25 weight percent silicon;

at least 58 weight percent nickel; and

incidental impurities.

21. The article of manufacture of claim 18, wherein the alloy exhibits an ASTM grain size of 3.0 to 8.0.

22. The article of manufacture of claim 18, wherein the alloy exhibits an ASTM grain size of 3.5 to 7.5.

23. The article of manufacture of claim 18, wherein the alloy exhibits an ASTM grain size of 4.5 to 6.5.

24. The article of manufacture of claim 18, wherein the alloy exhibits an ASTM grain size of 3.0 to 6.0.

25. The article of manufacture of claim 18, wherein the alloy lacks intragranular M₂₃C₆ carbide precipitates.

26. The article of manufacture of claim 18, wherein chemically etched specimens of the alloy lack metallographically observable intragranular M₂₃C₆ carbide precipitates when observed at 500×

magnification by scanning electron microscopy.

27. The article of manufacture of claim 18, wherein chemically etched specimens of the alloy include uniformly distributed intergranular M₂₃C₆ carbide precipitates on grain boundaries when observed at 500×

magnification by scanning electron microscopy.

28. The article of manufacture of claim 18, wherein the alloy lacks stringers of grain boundary precipitates.

29. An article of manufacture including an alloy comprising:

up to 0.05 weight percent carbon;

27.0 to 31.0 weight percent chromium;

up to 0.5 weight percent copper;

7.0 to 11.0 weight percent iron;

up to 0.5 weight percent manganese;

up to 0.015 weight percent sulfur;

up to 0.5 weight percent silicon;

at least 58 weight percent nickel; and

incidental impurities;

wherein the alloy exhibits an ASTM grain size of 3.0 to 9.0 and a uniform grain size distribution;

wherein chemically etched specimens of the alloy include uniformly distributed intergranular M₂₃C₆ carbide precipitates on grain boundaries when observed at 500×

magnification by scanning electron microscopy;

wherein chemically etched specimens of the alloy lack metallographically observable intragranular M₂₃C₆ carbide precipitates when observed at 500×

magnification by scanning electron microscopy; and

wherein the article is selected from a forged article and a rolled article.

30. The article of manufacture of claim 29, wherein the article is selected from a rod, a bar, a round bar, a round rod, a rectangular bar, a rectangular rod, a hexagonal bar, a hexagonal rod, a forged rectangular long product, a rolled rectangular long product, a tube, a forged tube, and a rotary forged tube.