Metal fusion bonding – Process – Diffusion type
Reexamination Certificate
1999-05-24
2001-01-16
Ryan, Patrick (Department: 1725)
Metal fusion bonding
Process
Diffusion type
C228S121000, C228S121000, C219S076100, C219S121640, C219S121850
Reexamination Certificate
active
06173886
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an improved method for joining metals or alloys together. Specifically, the present invention relates to a method comprising the laser alloying of a first metal/alloy piece so that it can be joined with a second metal/alloy piece of a nonidentical composition.
2. Description of the Prior Art
It is well known in the science of corrosion chemistry that certain metals and/or alloys will corrode if they are joined together. This corrosion results in a deterioration of the joint where the two metals or alloys are joined.
SUMMARY OF THE INVENTION
The present invention is directed to a method for joining two dissimilar metals or alloy pieces. The invention comprises coating a first surface of a first metal or alloy piece with a precursor layer comprising a binder and elemental/ceramic powder. The invention further comprises irradiating the first surface of the first piece with a laser beam at a sufficient energy and for a sufficient time to produce a surface alloyed layer on the first piece. The invention further comprises allowing the alloyed layer to solidify. The invention further comprises joining a second metal or alloyed piece to the surface alloyed layer of the first piece, wherein the second piece has a composition that is not identical to that of the first piece.
REFERENCES:
patent: 3705758 (1972-12-01), Haskal
patent: 3848104 (1974-11-01), Locke
patent: 3986767 (1976-10-01), Rexer et al.
patent: 4015100 (1977-03-01), Gnanamuthu et al.
patent: 4017708 (1977-04-01), Engel et al.
patent: 4023936 (1977-05-01), Morse et al.
patent: 4033504 (1977-07-01), Fletcher et al.
patent: 4157923 (1979-06-01), Yen et al.
patent: 4212900 (1980-07-01), Serlin
patent: 4322601 (1982-03-01), Serlin
patent: 4434189 (1984-02-01), Zaplatynsky
patent: 4475027 (1984-10-01), Pressley
patent: 4480169 (1984-10-01), Macken
patent: 4495255 (1985-01-01), Draper et al.
patent: 4514470 (1985-04-01), Rosenthal et al.
patent: 4535218 (1985-08-01), Krause et al.
patent: 4617070 (1986-10-01), Amende et al.
patent: 4638163 (1987-01-01), Braunlich et al.
patent: 4644127 (1987-02-01), La Rocca
patent: 4702969 (1987-10-01), Bunkoczy et al.
patent: 4720312 (1988-01-01), Fukuizumi et al.
patent: 4724299 (1988-02-01), Hammeke
patent: 4746540 (1988-05-01), Kawasaki et al.
patent: 4750947 (1988-06-01), Yoshiwara et al.
patent: 4801352 (1989-01-01), Piwczyk
patent: 4839518 (1989-06-01), Bruanlich et al.
patent: 4847112 (1989-07-01), Halleux
patent: 4898650 (1990-02-01), Wu et al.
patent: 4904498 (1990-02-01), Wu
patent: 4964967 (1990-10-01), Hashimoto et al.
patent: 4981716 (1991-01-01), Sundstrom
patent: 4998005 (1991-03-01), Rathi et al.
patent: 5059013 (1991-10-01), Jain
patent: 5095386 (1992-03-01), Scheibengraber
patent: 5124993 (1992-06-01), Braunlich et al.
patent: 5130172 (1992-07-01), Hicks et al.
patent: 5147999 (1992-09-01), Dekumbis et al.
patent: 5196672 (1993-03-01), Matsuyama et al.
patent: 5208431 (1993-05-01), Uchiyama et al.
patent: 5230755 (1993-07-01), Pierantoni et al.
patent: 5247155 (1993-09-01), Steen et al.
patent: 5257274 (1993-10-01), Barrett et al.
patent: 5265114 (1993-11-01), Sun et al.
patent: 5267013 (1993-11-01), Spence
patent: 5290368 (1994-03-01), Gavigan et al.
patent: 5308431 (1994-05-01), Maher et al.
patent: 5314003 (1994-05-01), Mackay
patent: 5319195 (1994-06-01), Jones et al.
patent: 5322436 (1994-06-01), Horng et al.
patent: 5331466 (1994-07-01), Van Saarloos
patent: 5352538 (1994-10-01), Takeda et al.
patent: 5387292 (1995-02-01), Morishige et al.
patent: 5406042 (1995-04-01), Engelfriet et al.
patent: 5409741 (1995-04-01), Laude
patent: 5411770 (1995-05-01), Tsai et al.
patent: 5430270 (1995-07-01), Findlan et al.
patent: 5446258 (1995-08-01), Mordike
patent: 5449536 (1995-09-01), Funkhouser et al.
patent: 5466906 (1995-11-01), McCune, Jr. et al.
patent: 5484980 (1996-01-01), Pratt et al.
patent: 5486677 (1996-01-01), Maischner et al.
patent: 5491317 (1996-02-01), Pirl
patent: 5514849 (1996-05-01), Findlan et al.
patent: 5530221 (1996-06-01), Benda et al.
patent: 5546214 (1996-08-01), Black et al.
patent: 5563095 (1996-10-01), Frey
patent: 5614114 (1997-03-01), Owen
patent: 5643641 (1997-07-01), Turchan et al.
patent: 5648176 (1997-07-01), Nakagawa et al.
patent: 5659479 (1997-08-01), Duley et al.
patent: 5874011 (1999-02-01), Ehrlich
patent: 5985056 (1999-11-01), McCay et al.
patent: 4126351 (1993-02-01), None
patent: 876870A1 (1998-04-01), None
patent: 279692 (1988-11-01), None
patent: 401083676 (1989-03-01), None
patent: 381082 (1991-04-01), None
patent: 3115587 (1991-05-01), None
patent: 403115531 (1991-05-01), None
patent: 5285686 (1993-11-01), None
patent: 1557193 (1990-04-01), None
patent: 1743770 (1992-06-01), None
patent: WO 95/21720 (1995-08-01), None
patent: WO 97/47397 (1997-12-01), None
Ernest Nippes. Metals Handbook: Ninth edition; vol. 6 Welding, Brazing, and Soldering, p. 709-711, 689-690, 680-681, 672-678, 655-658, 708, 684.
ASM Handbook, vol. 6, Welding, Brazing, and Soldering, 1993.
Ayers, et al.; “A Laser Processing Technique for Improving the Wear Resistance of Metals,”Journal of Metals, Aug. 1981, 19-23.
Belvaux, et al.; “A Method for Obtaining a Uniform Non-Gaussian Laser Illumination,”Optics Communications, vol. 15, No. 2, Oct. 1975, 193-195.
Bett, et al.; “Binary phase zone-plate arrays for laser-beam spatial-intensity distribution conversion,”Applied Optics, vol. 34, No. 20, Jul. 10, 1995, 4025-4036.
Bewsher, et al.; “Design of single-element laser-beam shape projectors,” Applied Optics, vol. 35, No. 10, Apr. 1, 1996, 1654-1658.
Breinan, et al.; “Processing material with lasers,”Physics Today, Nov. 1976, 44-50.
Bruno, et al.; “Laserbeam Shaping for Maximum Uniformity and Maximum Loss, A Novel Mirror Arrangement Folds the Lobes of a Multimode Laserbeam Back onto its Center,”Lasers&Applications, Apr. 1987, 91-94.
Chen, et al.; “The Use of a Kaleidoscope to Obtain Uniform Flux Over a Large Area in a Solar or Arc Imaging Furnace,”Applied Optics, vol. 2, No. 3, Mar. 1963, 265-571.
Christodoulou, et al.; “Laser surface melting of some alloy steels,”Metals Technology, Jun. 1983, vol. 10, 215-222.
Cullis, et al.; “A device for laser beam diffusion and homogenisation,” J. Phys.E:Sci. Instrum., vol. 12, 1979, 668-689.
Dahotre, et al., “Development of microstructure in laser surface alloying of steel with chromium,”Journal of Materials Science, vol. 25, 1990, 445-454.
Dahotre, et al., “Laser Surface Melting and Alloying of Steel with Chromium,”Laser Material Processing III, 1989, 3-19.
Fernelius, et al.; “Design and Testing of a Refractive Laser Beam Homogenizer,”Airforce Writing Aeronautical Laboratories Report, (AFWAL-TR-84-4042), Sep. 1984, 46 pages.
Frieden; “Lossless Conversion of a Plane Laser Wave to a Plane Wave of Uniform Irradiance,”Applied Optics, vol. 4, No. 11, Nov. 1965, 1400-1403.
Galletti, et al.; “Transverse-mode selection in apertured super-Gaussian resonators: an experimental and numerical investigation for a pulsed CO2Doppler lidar transmitter,”Applied Optics, vol. 36, No. 6, Feb. 20, 1997, 1269-1277.
Gori, et al.; “Shape-invariance range of a light beam,”Optics Letters, vol. 21, No. 16, Aug. 15, 1996, 1205-1207.
Grojean, et al.; “Production of flat top beam profiles for high energy lasers,” Rev. Sci. Instrum. 51(3), Mar. 1980, 375-376.
Hella, “Material Processing with High Power Lasers,”Optical Engineering, vol. 17, No. 3, May-Jun. 1978, 198-201.
Ignatiev, et al.; “Real-time pyrometry in laser machining,”Measurement and Science Technology, vol. 5, No. 5, 563-573.
“Laser Removing of Lead-Based Paint” Illinois Department of Transportation, Jun. 1992, 26 pages.
Jones, et al.; “Laser-beam analysis pinpoints critical parameters,”Laser Focus World, Jan. 1993, 123-130.
Khanna, et al.; “The Effect of Stainless Steel Plasma Coating and Laser Treatment on the Oxidation Resistance of Mild Steel,”Corrosion Science, vol. 33, No. 6, 1992, 949-958.
“New Products”Laser Focus World, Aug. 1996, 173.
Lugscheider, et al.;“A Comparison of the Properties of Coatings Produced
Bible John Brice
Dahotre Narendra B.
Hopkins John A.
McCay Mary Helen
McCay T. Dwayne
Duane Morris & Heckscher LLP
Johnson Jonathan
Ryan Patrick
The University of Tennessee Research Corportion
LandOfFree
Method for joining dissimilar metals or alloys does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for joining dissimilar metals or alloys, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for joining dissimilar metals or alloys will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2501405