Metal treatment – Process of modifying or maintaining internal physical... – Producing or treating layered – bonded – welded – or...
Reexamination Certificate
1999-07-02
2001-09-04
Wyszomierski, George (Department: 1742)
Metal treatment
Process of modifying or maintaining internal physical...
Producing or treating layered, bonded, welded, or...
C148S565000, C219S121820, C219S121850, C427S556000, C427S597000
Reexamination Certificate
active
06284067
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a method of using a laser to produce alloyed bands or strips on the surface of a piston for an internal combustion engine. More specifically, the present invention relates to a laser alloying method to produce superior wear resistant properties for an aluminum internal combustion engine piston.
2. Description of the Prior Art
Internal combustion engines comprise reciprocating pistons which are exposed to harsh environmental conditions, including high temperatures, and friction. Prior art pistons have been plated with chrome in order to enhance their wear resistant characteristics. Chrome plating is expensive and is subject to deterioration from harsh environmental conditions present in internal combustion engines.
SUMMARY OF THE INVENTION
The present invention is directed toward a process or method for producing alloyed bands or strips on an aluminum piston for use in an internal combustion engine. The present invention comprises applying a precursor layer comprising a binder and metallic or ceramic powder to the surface of an aluminum piston, as shown in Block
10
of FIG.
1
. The precursor layer has a thickness in the range of 50-100 microns.
The invention further comprises irradiating the piston surface with a laser beam at a sufficient energy level and for a sufficient time to produce an alloyed layer on the surface of the piston having enhanced wear characteristics, as shown in Block
12
of FIG.
1
. During irradiation, the piston and the laser beam are moved relative to each other.
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: 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: 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: 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), Braunlich 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: 5308409 (1994-05-01), Kamimura 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: 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: 401083676A (1989-03-01), None
patent: 381082 (1991-04-01), None
patent: 3115587A (1991-05-01), None
patent: 403115531A (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
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 by Laser Cladding and Conventional Methods,”Surface Modification Technologies V, The Institute of Mate
Bible John Brice
Dahotre Narendra B.
Hopkins John A.
McCay Mary Helen
McCay T. Dwayne
Duane Morris & Heckscher LLP
The University of Tennessee Research Corporation
Wyszomierski George
LandOfFree
Method for producing alloyed bands or strips on pistons for... 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 producing alloyed bands or strips on pistons for..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for producing alloyed bands or strips on pistons for... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2475829