Alloys or metallic compositions – Titanium base
Reexamination Certificate
2006-01-26
2008-12-16
King, Roy (Department: 1793)
Alloys or metallic compositions
Titanium base
C420S421000, C420S581000, C148S421000, C148S422000
Reexamination Certificate
active
07465423
ABSTRACT:
A braze material and method of brazing titanium metals. The material may consist of Ti, Ni, Cu Zr, PM and M where PM is a precious metal and M may be Fe, V, Cr, Co, Mo, Nb, Mn, Si, Sn, Al, B, Gd, Ge or combinations thereof, with the (Cu+PM)/Ni ratio around 0.9. Optionally, a second brazing may be performed to rebraze any braze joint that did not braze successfully. The second brazing material has a lower braze temperature than the first and may consist of a mixture of Ti, Ni, Cu, Zr PM and M with from 1-20 wt % more Zr, PM, M or combinations thereof than the first braze. The braze material may be placed on a base material, in a vacuum furnace, and heated to form a braze joint between the braze and base material. The heating step may occur from about 800-975° C. and over 3 to 15 minutes.
REFERENCES:
patent: 3998632 (1976-12-01), Kosteruk et al.
patent: 4144057 (1979-03-01), Melton et al.
patent: 4725509 (1988-02-01), Ryan
patent: 4897243 (1990-01-01), Mizuhara
patent: 4989773 (1991-02-01), Ishiyama
patent: 5013612 (1991-05-01), Hunt et al.
patent: 5240491 (1993-08-01), Budinger et al.
patent: 5873703 (1999-02-01), Kelly et al.
patent: 6149051 (2000-11-01), Vollmer et al.
patent: 6223976 (2001-05-01), Clement et al.
patent: 6482537 (2002-11-01), Strangman et al.
patent: 6613123 (2003-09-01), Corbin et al.
patent: 2006/0118600 (2006-06-01), Raybould et al.
patent: 0456 481 (1991-11-01), None
patent: 752117 (1956-07-01), None
patent: 59126739 (1984-07-01), None
patent: 2001 212664 (2001-04-01), None
Derwent 1992-011465 abstract of JP 03260046A, published Nov. 20, 1991.
“Grit and Microgrit Grading Conversion Chart” at READE. http://www.reade.com/Sieve/grit—conversion.html. Copyright 1997.
Derwent Acc No. 1984-216392. Abstract for patent family JP 59126739 A, published Jul. 21, 1984 and JP 95017975 B2. , published Mar. 1, 1995.
Hoffman, “Evaluation of Enhanced Diffusion Bonded Beta Titanium Honeycomb Core Sandwich Panels With Alpha-2 Titanium Aluminide Face Sheets,” NASP Technical Memorandum, 1191 p. 1135.
Cadden, “Microstructural Evolution and Mechanical Properties and Braze Joints in Ti-13.4 Al-21.2 Nb,” Welding Research Supplement, Aug. 1997, pp. 316-325s.
Onzawa et al., “Brazing of Titanium Using Low-Melting Point Ti-Based Filler Metals,” Welding Research Supplement, Dec. 1990, pp. 462-467s.
Huang et al., “Effect of Heat Treatment on the Microstructure of a Metastable .beta.-Titanium Alloy,” Journal of Materials Engineering and Performance, Aug. 1994, v. 3(4), pp. 560-566.
Botstein et al. “Brazing of titanium-based alloys with amorphous 25 wt. % Ti-25 wt. % Zr-50 wt. % Cu filler metal,” Materials Science and Engineering, 1994, pp. 305-315.
Rabinkin, “New Applications for Rapidly Solidified Brazing Foils,” Welding Journal, Oct. 1989, pp. 39-46.
Sorenson, “Titanium Matrix Composites,” NASP Contractor Report, 1990 p. 1096.
Xu, Q et al. (University of Manitoba), “Diffusion Brazing of a TiA1 alloy”, Advanced Brazing and Soldering Technologies, 57-64, International Brazing & Soldering Conference, 2000, XP009038231.
Chipko Paul
Pohlman Matthew
Raybould Derek
Caglar Esq. Oral
Honeywell International , Inc.
King Roy
McGuthry-Banks Tima M
LandOfFree
Low cost brazes for titanium does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Low cost brazes for titanium, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low cost brazes for titanium will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4023675