COMPONENT HAVING VARYING STRUCTURES AND METHOD FOR PRODUCTION

• US 20110293431A1
• Filed: 01/08/2010
• Published: 12/01/2011
• Est. Priority Date: 01/21/2009
• Status: Abandoned Application

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: Harders, Harald, Lüsebrink, Oliver
• Application Number:
  US13/145,441
• Publication Number:
  US 20110293431A1
• Time in Patent Office: Days
• US Class Current: 416/219.R
• CPC Class Codes: B22D 27/045 Directionally solidified castings
• CPC Class Codes: C30B 29/52 Alloys
• CPC Class Codes: F01D 5/147 Construction, i.e. structural features, e.g. of weight-saving hollow blades F01D5/148, F01D5/16 and F01D5/20 take precedence; blade shape F01D5/141; blades with cooling or heating channels or cavities F01D5/18; heating, heat-insulating or cooling means on blades F01D5/18
• CPC Class Codes: F05D 2240/80 Platforms for stationary or moving blades
• CPC Class Codes: F05D 2300/607 Monocrystallinity
• CPC Class Codes: Y02T 50/60 Efficient propulsion technologies, e.g. for aircraft

Abstract

Single-crystalline or stem-shaped turbine blades are difficult to produce. A turbine blade is provided which has varying structures for different areas of the turbine blade, wherein the airfoil region always includes a stem-shaped or single crystalline structure and the other regions may deviate therefrom. A method for producing the turbine blade is also provided.

Claims

1-15. -15. (canceled)

16. A component, comprising:

a first region; and

a second region,

wherein the second region includes a subordinate structure relative to the first region,

wherein a columnar structure and a nondirectionally solidified structure represent a subordinate structure relative to a single-crystal structure, and

wherein the nondirectionally solidified structure represents a secondary structure relative to a columnar structure and a single-crystal structure, and

wherein the single-crystal structure extends as far as a certain thickness, but at most partially into a blade platform.

17. The component as claimed in claim 16,

wherein the component is a turbine blade which comprises a blade surface region as a first region, a blade platform as a first and/or second region, and a fastening region as a second region, and

wherein the blade surface region includes a single-crystal or columnar structure, and at least the fastening region includes a subordinate structure relative to the blade surface region.

18. The component as claimed in claim 16, wherein the first region includes a single-crystal structure.

19. The component as claimed in claim 16, wherein the entire first region includes a single-crystal structure and the entire blade surface region includes a single-crystal structure.

20. The turbine blade as claimed in claim 18,

wherein the single-crystal structure extends through the entire blade platform.

21. The component as claimed in claim 16, wherein the first region includes a columnar structure.

22. The component as claimed in claim 16, wherein the entire first region includes a columnar structure and the entire blade surface region includes a columnar structure.

23. The turbine blade as claimed in claim 16, wherein the columnar structure extends as far as a certain thickness, but at most partially into the blade platform.

24. The turbine blade as claimed in claim 22, wherein the columnar structure extends through the entire blade platform.

25. The component as claimed in claim 16, wherein the second region includes a nondirectionally solidified structure.

26. The component as claimed in claim 16, wherein the blade fastening region includes a nondirectionally solidified structure.

27. The component as claimed in claim 16, wherein the second region includes a columnar structure.

28. The component as claimed in claim 16, wherein the blade fastening region includes a columnar structure.

29. The turbine blade as claimed in claim 17, wherein the blade platform has a different structure than the blade surface region.

30. The turbine blade as claimed in claim 17, wherein the blade platform has at most partially the same structure as the blade surface region.

31. The turbine blade as claimed in claim 17, wherein the blade platform has the same structure as the blade surface region.

32. The component as claimed in claim 17, wherein the component comprises a different alloy in the first region than in the second region.

33. A method for producing a component which comprises a first region and a second region, comprising:

allowing the first region initially to solidify with a part of starting material of a first alloy; and

switching over a plurality of process parameters and a remaining amount of starting material of a second alloy is added in order to solidify the second region,

wherein the second region includes a subordinate structure relative to the first region,

wherein a columnar structure and a nondirectionally solidified structure represent a subordinate structure relative to a single-crystal structure, and

wherein a nondirectionally solidified structure represents a secondary structure relative to a columnar structure and a single-crystal structure.

34. A method for producing a component which comprises a first region and a second region, comprising:

providing and melting of a full amount of starting material for all regions;

solidifying the first region using a part of the full amount of starting material;

switching over a plurality of process parameters and additional alloy elements are added in the remaining not yet solidified part of the full amount of starting material in order to produce the second region; and

solidifying of the second region,

wherein the second region includes a subordinate structure relative to the first region,

wherein a columnar structure and a nondirectionally solidified structure represent a subordinate structure relative to a single-crystal structure, and

wherein the nondirectionally solidified structure represents a secondary structure relative to a DS structure and a single-crystal structure.

35. A method for producing a component which comprises a first region and a second region, comprising:

providing and melting of a full amount of starting material for all regions;

allowing the first region initially to solidify with a part of the full amount of starting material;

switching over a plurality of process parameters, in order to produce the second region; and

solidifying the second region with a remaining part of the full amount of starting material,

wherein the second region includes a subordinate structure relative to the first region,

wherein a columnar structure and a nondirectionally solidified structure represent a subordinate structure relative to a single-crystal structure, and

wherein a nondirectionally solidified structure represents a secondary structure relative to a DS structure and a single-crystal structure.