Use of silver-copper-palladium brazing alloys

• US 20090241689A1
• Filed: 02/10/2009
• Published: 10/01/2009
• Est. Priority Date: 07/18/1997
• Status: Abandoned Application

• Current Assignee: Endress+Hauser Flowtec AG (Endress+Hauser AG)
• Original Assignee: Endress+Hauser Flowtec AG (Endress+Hauser AG)
• Inventors: Lorenz, Rainer
• Application Number:
  US12/320,997
• Publication Number:
  US 20090241689A1
• Time in Patent Office: Days
• US Class Current: 73/861.355
• CPC Class Codes: B23K 1/0008 specially adapted for particular articles or work
• CPC Class Codes: B23K 1/19 taking account of the properties of the materials to be soldered
• CPC Class Codes: B23K 2103/24 Ferrous alloys and titanium or alloys thereof
• CPC Class Codes: B23K 35/3006 Ag as the principal constituent
• CPC Class Codes: G01F 1/8404 details of flowmeter manufacturing methods
• CPC Class Codes: G01F 1/8409 constructional details
• CPC Class Codes: G01F 1/8413 means for influencing the flowmeter's motional or vibrational behaviour, e.g., conduit support or fixing means, or conduit attachments
• CPC Class Codes: G01F 1/849 having straight measuring conduits
• CPC Class Codes: Y10T 428/12812 Diverse refractory group metal-base components: alternative to or next to each other
• CPC Class Codes: Y10T 428/12896 Ag-base component

Abstract

A compound arrangement comprising a first component of metal being brazed to a second component of metal. The first component has an external cylindrical surface touching an cylindrical internal surface of the second component. The second component clasps the first component tightly, so that the second component exerts compressive stress on said external surface of the first component.

Claims

1-20. -20. (canceled)

21. A compound arrangement comprising a first component of metal being brazed to a second component of metal, said first component having a cylindrical external surface touching a cylindrical internal surface of said second component, said first and said second components being parts of a Coriolis mass flow sensor including a vibrating measuring tube for measuring a fluid conducted in a pipe, wherein the metal of said first component is titanium and the metal of said second component is steel, wherein the first and second components are brazed with a brazing alloy comprising silver, copper and palladium, INSERT said brazing alloy selected from the group consisting of:

a 68Ag-27Cu-5Pd brazing alloy;

a 58 Ag-32 Cu-10 Pd brazing alloy;

a 65 Ag-20 Cu-'"'"'5Pd brazing alloy; and

a 54 Ag-21 Cu-25 Pd brazing alloy.

22. The compound arrangement as claimed in claim 21, wherein the first component is said vibrating measuring tube of said Coriolis mass flow sensor.

23. The compound arrangement as claimed in claim 21, wherein the second component is a sleeve.

24. The compound arrangement as claimed in claim 21, wherein second component is a support tube of said Coriolis mass flow sensor.

25. The compound arrangement as claimed in claim 21, wherein the first component is a flange of said Coriolis mass flow sensor.

26. The compound arrangement as claimed in claim 21, wherein the first component is a flange of said Coriolis mass flow sensor.

27. The compound arrangement as claimed in claim 21, wherein the vibrating measuring tube is a straight tube.

28. The compound arrangement as claimed in claim 27, wherein the first component is a support tube of said Coriolis mass flow sensor.

29. The compound arrangement as claimed in claim 27, wherein the first component is a flange of said Coriolis mass flow sensor.

30. A Coriolis mass flow sensor comprising a titanium component and a steel component, which is joined with said titanium component by a brazing alloy, wherein the titanium component is a vibrating measuring tube of said Coriolis mass flow sensor, and wherein the brazing alloy comprises silver, copper and palladium, said brazing alloy selected from the group consisting of:

68 Ag-27 Cu-5 Pd brazing alloy;

a 58 Ag-32 Cu-10 Pd brazing alloy;

a 65 Ag-20 Cu-15 Pd brazing alloy, and a 54 Ag-21 Cu-25 Pd brazing alloy.

31. A compound arrangement comprising a first component of metal being brazed to a second component of metal, said first component having an cylindrical external surface touching a cylindrical internal surface of said second component, said first and said second components being parts of a Coriolis mass flow sensor including a vibrating measuring tube for measuring a fluid conducted in a pipe, wherein the metal of said first component is titanium and the metal of said second component is steel, and wherein the first and second components are brazed with a brazing alloy comprising silver (Ag), copper (Cu) and palladium (Pd), said brazing alloy is a composition of 68.5 wt. % silver, 26.5 wt. % copper, and 5 wt. % palladium.

32. The compound arrangement as claimed in claim 31, wherein the first component is said vibrating measuring tube of said Coriolis mass flow sensor.

33. The compound arrangement as claimed in claim 31, wherein the second component is a sleeve.

34. The compound arrangement as claimed in claim 31, wherein the second component is a support tube of said Coriolis mass flow sensor.

35. The compound arrangement as claimed in claim 31, wherein the first component is a flange of said Coriolis mass flow sensor.

36. The compound arrangement as claimed in claim 31, wherein the first component is a flange of said Coriolis mass flow sensor and the second component is a support tube of said Coriolis mass flow sensor.

37. The compound arrangement as claimed in claim 31, wherein the vibrating measuring tube is a straight tube.

38. The compound arrangement as claimed in claim 31, wherein the first component is a support tube of said Coriolis mass flow sensor.

39. The compound arrangement as claimed in claim 31, wherein the first component is a flange of said Coriolis mass flow sensor.

40. A Coriolis mass flow sensor comprising a titanium component and a steel component, which is join with said titanium component by a brazing alloy, wherein the titanium component is a vibrating measuring tube of said Coriolis mass flow sensor, and wherein the brazing alloy comprises silver (Ag), copper (Cu) and palladium (Pd), said brazing is a composition of 68.5 wt. % silver, 26.5 wt. % copper, and 5 wt. % palladium.