Cast B2-phase iron-aluminum alloys with improved fluidity

• US 6,436,339 B1
• Filed: 12/14/1999
• Issued: 08/20/2002
• Est. Priority Date: 12/14/1999
• Status: Expired due to Fees

• Current Assignee: Duraloy Technologies, Inc., Lockheed Martin Energy Research Corporation (Martin Marietta Corporation)
• Original Assignee: Duraloy Technologies, Inc.
• Inventors: Maziasz, Philip J., Paris, Alan M., Vought, Joseph D.
• Primary Examiner(s): Yee, Deborah
• Application Number:
  US09/461,566
• Time in Patent Office: 980 Days
• Field of Search: 420/77, 420/78, 148/320
• US Class Current: 420/77
• CPC Class Codes: C22C 38/06 containing aluminium

Abstract

Systems and methods are described for iron aluminum alloys. A composition includes iron, aluminum and manganese. A method includes providing an alloy including iron, aluminum and manganese; and processing the alloy. The systems and methods provide advantages because additions of manganese to iron aluminum alloys dramatically increase the fluidity of the alloys prior to solidification during casting.

Claims

1. A composition, comprising a cast B2-phase FeAl alloy including:

iron;

from approximately 20 to approximately 25 weight percent aluminum; and

from approximately 0.01 to approximately 5 weight percent manganese.

2. The composition of claim 1, wherein aluminum composes approximately 22.1 weight percent of said composition.

3. The composition of claim 1, wherein manganese composes from approximately 0.1 weight percent to approximately 1.0 weight percent of said composition.

4. The composition of claim 3, wherein manganese composes approximately 0.5 weight percent of said composition.

5. The composition of claim 1, further comprising from approximately 0.1 to approximately 2.0 weight percent silicon.

20. The composition of claim 1, further comprising 0.42 weight percent Mo.

21. The composition of claim 1, further comprising 0.1 weight percent Zr.

22. The composition of claim 1, further comprising 0.2 weight percent C.

23. The composition of claim 1, further comprising 0.005 weight percent B.

6. An apparatus, comprising a cast B2-phase FeAl alloy component including iron, from approximately 20 to approximately 25 weight percent aluminum and from approximately 0.01 to approximately 5 weight percent manganese.

7. The apparatus of claim 6, wherein aluminum composes approximately 22.1 weight percent of said component.

8. The apparatus of claim 6, wherein manganese composes from approximately 0.1 weight percent to approximately 1.0 weight percent of said component.

9. The apparatus of claim 8, wherein manganese composes approximately 0.5 weight percent of said component.

10. The apparatus of claim 6, wherein said component includes from approximately 0.1 to approximately 2.0 weight percent silicon.

24. The apparatus of claim 6, wherein the cast B2-phase FeAl alloy component includes 0.42 weight percent Mo.

25. The apparatus of claim 6, wherein the cast B2-phase FeAl alloy component includes 0.1 weight percent Zr.

26. The apparatus of claim 6, wherein the cast B2-phase FeAl alloy component includes 0.2 weight percent C.

27. The apparatus of claim 6, wherein the cast B2-phase FeAl alloy component includes 0.005 weight percent B.

11. A method, comprising:

providing a cast B2-phase FeAl alloy including iron, from approximately 20 to approximately 25 weight percent aluminum and from approximately 0.01 to approximately 5 weight percent manganese; and

processing said cast B2-phase FeAl alloy.

12. The method of claim 11, wherein processing said alloy includes at least partially filling a mold space with said alloy under casting conditions.

13. The method of claim 11, wherein providing an alloy includes providing an alloy containing approximately 22.1 weight percent aluminum.

14. The method of claim 11, wherein providing an alloy includes providing an alloy containing from approximately 0.1 weight percent to approximately 1.0 weight percent manganese.

15. The method of claim 14, wherein providing an alloy includes providing an alloy containing approximately 0.5 weight percent manganese.

16. The method of claim 14, wherein providing an alloy includes providing an alloy containing from approximately 0.1 to approximately 2.0 weight percent silicon.

28. The method of claim 11, wherein providing includes providing a cast B2-phase FeAl alloy including 0.42 weight percent Mo.

29. The method of claim 11, wherein providing includes providing a cast B2-phase FeAl alloy including 0.1 weight percent Zr.

30. The method of claim 11, wherein providing includes providing a cast B2-phase FeAl alloy including 0.2 weight percent C.

31. The method of claim 11, wherein providing includes providing a cast B2-phase FeAl alloy including 0.005 weight percent B.

17. A composition, comprising a cast B2-phase FeAl alloy including:

iron;

from approximately 20 to approximately 25 weight percent aluminum; and

from approximately 0.01 to approximately 5 weight percent silicon.

32. The composition of claim 17, further comprising from 0.1 to approximately 2.0 weight percent manganese.

18. An apparatus, comprising a cast B2-phase FeAl alloy component including iron, approximately 25 weight percent aluminum and from approximately 0.01 to approximately 5 weight percent silicon.

33. The apparatus of claim 18, wherein the cast B2-phase FeAl alloy component includes from 0.1 to approximately 2.0 weight percent manganese.

19. A method, comprising:

providing a cast B2-phase FeAl alloy including iron, from approximately 20 to approximately 25 weight percent aluminum and from approximately 0.01 to approximately 5 weight percent silicon; and

processing said cast B2-phase FeAl alloy.

34. The method of claim 19, wherein providing includes providing a cast B2-phase FeAl alloy including from 0.1 to approximately 2.0 weight percent manganese.