Method for joining components in titanium aluminide by brazing

• US 20040182843A1
• Filed: 12/16/2003
• Published: 09/23/2004
• Est. Priority Date: 12/24/2002
• Status: Active Grant

• Current Assignee: Rolls-Royce Deutschland Limited & Company KG (Rolls-Royce Holdings Plc)
• Original Assignee: Rolls-Royce Deutschland Limited & Company KG (Rolls-Royce Holdings Plc)
• Inventors: Schreiber, Karl, Jakobi, Gunther
• Granted Patent: US 7,781,696 B2
• Time in Patent Office: Days
• US Class Current: 219/121.85
• CPC Class Codes: B23K 1/0008 specially adapted for particular articles or work
• CPC Class Codes: B23K 1/0056 soldering by means of beams, e.g. lasers, E.B.
• CPC Class Codes: B23K 2103/14 Titanium or alloys thereof

Abstract

A method for joining components in TiAl with a braze includes heating the braze with a laser.

Claims

1. A method for the joining of TiAl components with a braze, wherein the braze is heated by a laser.

2. A method Method in accordance with claim 1, wherein there is no primary heat input into the components.

3. A method in accordance with claim 1, wherein there is only minor heat input into the components.

4. A method in accordance with claim 3, wherein TiAl sheets are joined.

5. A method in accordance with claim 4, wherein the components are joined with a braze gap.

6. A method in accordance with claim 5, wherein the components are butt-joined.

7. A method in accordance with claim 6, wherein joining is accomplished under protective gas.

8. A method in accordance with claim 7, wherein the components are positioned relative to each other at room temperature and under atmospheric pressure.

9. A method in accordance with claim 8, wherein a ductile braze is used.

10. A method in accordance with claim 9, wherein the molten bath is protected from sagging by means of a backing bar.

11. A method in accordance with claim 10, wherein the braze is fed in the form of a wire.

12. A method in accordance with claim 10, wherein the braze is fed in the form of powder.

13. A method in accordance with claim 2, wherein TiAl sheets are joined.

14. A method in accordance with claim 13, wherein the components are joined with a braze gap.

15. A method in accordance with claim 14, wherein the components are butt-joined.

16. A method in accordance with claim 15, wherein joining is accomplished under protective gas.

17. A method in accordance with claim 16, wherein the components are positioned relative to each other at room temperature and under atmospheric pressure.

18. A method in accordance with claim 17, wherein a ductile braze is used.

19. A method in accordance with claim 18, wherein the molten bath is protected from sagging by means of a backing bar.

20. A method in accordance with claim 1, wherein TiAl sheets are joined.

21. A method in accordance with claim 1, wherein the components are joined with a braze gap.

22. A method in accordance with claim 1, wherein the components are butt-joined.

23. A method in accordance with claim 1, wherein joining is accomplished under protective gas.

24. A method in accordance with claim 1, wherein the components are positioned relative to each other at room temperature and under atmospheric pressure.

25. A method in accordance with claim 1, wherein a ductile braze is used.

26. A method in accordance with claim 1, wherein the molten bath is protected from sagging by means of a backing bar.

27. A method in accordance with claim 1, wherein the TiAl components are joined with a filled joint.

28. A method in accordance with claim 1, wherein the TiAl components are joined by an overlapping joint.

29. A method in accordance with claim 1, wherein the TiAl components are joined without a braze gap.

30. A method in accordance with claim 4, wherein the TiAl components are joined with a filled joint.

31. A method in accordance with claim 4, wherein the TiAl components are joined by an overlapping joint.

32. A method in accordance with claim 4, wherein the TiAl components are joined without a braze gap.