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1. 发明专利

CA2159139A1 USING ELECTRICAL DISCHARGE SURFACE PREPARATION FOR THERMAL COATINGS 未知
公开(公告)号：CA2159139A1
公开(公告)日：1996-03-29
申请号：CA2159139
申请日：1995-09-26
申请人： FORD MOTOR CANADA
发明人： RAO V DURGA NAGESWAR , ROSE ROBERT ALAN , PARSONS ROBERT S , YEAGER DAVID ALAN
IPC分类号： B23H1/08 , B23H9/00 , C23C4/02 , B23H1/00
摘要： A method of preparing the surface of a conductive metal to be non-smooth and non-passivated for reception of thermal sprayed coatings. The method comprises melting and rapidly solidifying globules of the surface by electrical discharge by bring an electrode (anode) in close gapsparking proximity to the surface, filling the gap with an electrolyte containing a halogenated hydrocarbon fluid present in an amount of 2-5% of the electrolyte, and imposing a pulsed DC voltage (i.e. 20-100 volts at 40-200 amps) on the electrode to provide cyclical sparking between the electrode and the surface through the electrolyte resulting in a breakdown of the hydrocarbon to release nascent halogen atoms which attack the surface to prevent passivation during melting and solidification of the globules. The electrolyte is preferably cooled to a temperature below 65.degree.F during the sparking, and the halogenated hydrocarbon is preferably present in a sufficient amount to attack silicon and aluminum, if such surface is an aluminum alloy containing silicon.

2. 发明专利

CA2164138A1 AGGLOMERATED ANTI-FRICTION GRANULES FOR PLASMA DEPOSITION 未知
公开(公告)号：CA2164138A1
公开(公告)日：1996-06-10
申请号：CA2164138
申请日：1995-11-30
申请人： FORD MOTOR CANADA
发明人： RAO V DURGA NAGESWAR , ROSE ROBERT ALAN , YEAGER DAVID ALAN , FUCINARI CARLO ALBERTO
IPC分类号： B22F1/00 , C22C33/02 , C23C4/04 , C22C1/05 , C23C4/06
摘要： A collection of agglomerated anti-friction grains for plasma deposition, the grains each consisting essentially of (a) H2O atomized stainless steel particles, (b) solid lubricant particles consisting of at least one of boron nitride or a eutectic of calcium fluoride and lithium fluoride, and (c) a binder holding said steel and solid lubricant particles together for plasma spraying, said binder being present in an amount of .5-4.0% by weight and is vaporizable at the temperature of plasma spraying and does not interfere with the deposited process. A method of making agglomerated grains of powder suitable for plasma deposition, by (a) H2O atomization of a molten stream of martensitic stainless steel to produce a collection of first particles, (b) uniformly blending such first particles with solid lubricant second particles and a binder agent in a slurry, the binder agent being present in a small amount and being constituted to vaporize at the temperature of plasma spraying, and (c) mist spraying the slurry into a heated chamber to form a collection of porous rounded granules.

3. 发明专利

CA2226242A1 LIQUID PHASE SINTERED POWDER METAL ARTICLES 未知
公开(公告)号：CA2226242A1
公开(公告)日：1998-08-03
申请号：CA2226242
申请日：1998-01-05
申请人： FORD MOTOR CANADA
发明人： MOCARSKI STANISLAW , CHENERNKOFF RUSSELL A , YEAGER DAVID ALAN , MCHUGH CHARLES OLIVER
IPC分类号： C22C33/02 , B22F3/16
摘要： A method of making a structural iron-based article comprising: (a) blending a compressible base iron powder (max. particle size of 100 microns) a graphite powder to provide carbon in mixture, and a single master alloy powder (average particle size of 10 microns) meltable within the range of 900-1200.degree.C (1690-2220.degree.F) to form a mixture, the master alloy powder being present in an amount of 1-5% by weight of the mixture and consisting of (i) hardenability enhancing alloying ingredients selected from Mn, Mo, Ni, Cr, Cu and Fe, with Fe being present only if Cr or Mo is selected and (ii) wetting agents selected from the group of B, Y, Si and rare earth misch metal, the master alloy being devoid of carbon and being proportioned to provide a desired amount of hardenability in the base powder; (b) compacting the mixture to a green density 7.1-7.4 g/cm3 to form a green part (c) machining the green part to a desired configuration if necessary; (d) sintering the green part to achieve liquification of the master alloy to densify the part to 7.3-7.5 g/cm3 without substantially varying the configuration of the green; and (e) cooling the sintered part at a controlled rate to form a desired microstructure such as essentially a bainite or ferrite/pearlite microstructure.

4. 发明专利

CA2164139A1 LOW ALLOY STEEL POWDER FOR PLASMA DEPOSITION HAVING SOLID LUBRICANT PROPERTIES 未知
公开(公告)号：CA2164139A1
公开(公告)日：1996-06-10
申请号：CA2164139
申请日：1995-11-30
申请人： FORD MOTOR CANADA
发明人： RAO V DURGA NAGESWAR , ROSE ROBERT ALAN , YEAGER DAVID ALAN , FUCINARI CARLO ALBERTO
IPC分类号： B22F1/00 , C22C32/00 , C23C4/06 , C23C4/08 , C23C4/10 , C23C4/16 , C22C9/00 , C22C38/00 , B22F9/08
摘要： An iron or copper based metal powder useful for plasma deposition of a coating that has a dry coefficient of friction .75 or less and readily conducts heat through the coating. The powder comprises (a) H2O atomized and annealed particles consisting essentially of (by weight) carbon .15-.85%, oxygen .1-.45%, an air hardening agent selected from manganese and nickel of .1-6.5%, and the remainder iron or copper, with at least 90% of the particles having oxygen and iron or copper combined in the lowest atomic oxygen form for an oxide of such metal. A method of making anti-friction iron powder that is economical, selectively produces FeO and promotes fine flowable particles. The method comprises (a) steam atomization of a molten steel that excludes other oxygen, the steel containing carbon up to .4% by weight to produce a collection of comminuted particles, and (b) annealing the particles in an air atmosphere for a period of time of .252.0 hours in a temperature range of 800.degree.-1400.degree.F to reduce carbon in the particles to about .2% or sponge iron by reducing Fe3O4 or Fe2O3 in CO and (H2O steam) to attain nearly all iron with nearly all FeO and 0.1 to 0.85 C.

5. 发明专利

CA2164137A1 METHOD OF MAKING AN ENGINE BLOCK USING COATED CYLINDER BORE LINERS 未知
公开(公告)号：CA2164137A1
公开(公告)日：1996-06-10
申请号：CA2164137
申请日：1995-11-30
申请人： FORD MOTOR CANADA
发明人： RAO V DURGA NAGESWAR , ROSE ROBERT ALAN , YEAGER DAVID ALAN , KABAT DANIEL MICHAEL
IPC分类号： F02F1/00 , C23C4/00 , C23C4/02 , C23C4/14 , F02B75/18 , F02B75/22 , F02F1/10 , F02F1/16 , F02F1/20 , F02F7/00 , B22D15/02 , F16J10/04
摘要： A method of making coated engine blacks by (a) casting a metallic engine block having one or more cylinder bores; (b) fabricating a thin walled liner for each bore, the liner being constituted of extruded metallic tubing having a cleansed inner surface, a wall thickness controlled to a thickness of 1-3mm diameter of the liner being slightly greater than the internal diameter of the cylinder bores; (c) relatively rotating the liner with respect to one or more nozzles for applying a plurality of materials to the internal surface of the liner, the materials comprising first a metal texturing fluid that is applied at high pressures to expose fresh metal of the surface, secondly a bond coating material that is thermally sprayed to form a metallurgical bond with the liner internal surface, and a top coating of anti-friction material that is adheringly plasma sprayed to the bond coating; (d) honing the coated internal surface to remove up to 150 microns of top coating, leaving a finish surface that is concentric to the tube axis within microns; and (e) interference fitting the coated liner to the cylinder bore by freezing the liner while maintaining the block at or above ambient temperature to permit implanting of the liner.

6. 发明专利

CA2168916A1 FLEXIBLY MAKING ENGINE BLOCK ASSEMBLIES 未知
公开(公告)号：CA2168916A1
公开(公告)日：1996-09-17
申请号：CA2168916
申请日：1996-02-06
申请人： FORD MOTOR CANADA
发明人： RAO V DURGA NAGESWAR , ROSE ROBERT ALAN , YEAGER DAVID ALAN , KABAT DANIEL MICHAEL
IPC分类号： F02B69/00 , F02B75/18 , F02B75/22 , F02F3/00 , F02F7/00 , F02F1/00 , F16J10/04 , B22D19/08
摘要： A method of flexibly manufacturing engine blocks by first bonding an extruded tube liner insert, of a given thickness (1-15mm), to a fixed configuration block, the liner insert having been coated with an anti-friction wearresistant coating having a controlled standard thickness, and secondly bonding an extruded tube liner insert of a different thickness (again selected from 1-15mm) to another of the fixed configuration blocks, the second liner insert having been coated with the same type of anti-friction wear-resistant coating in essentially the same controlled standard thickness. The common sized engine block can have (i) identically shaped circular cylindrical bore walls or (ii) ovoid cylindrical bore walls with the liner insert having an interior surface shape selection varying between circular to ovoid. The block and liner insert may be both made of aluminum. To promote wear-resistant and lubricant qualities, the coating may contain a mixture of hard particles (such as stainless steel, nickel, chromium or vanadium) and solid lubricant particles such as oxides of iron having controlled oxygen, BN, LiF, NaF2 or a eutectic of LiF/NaF2.

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