US3705818A - Methods of coating rubbing surfaces and elements comprising such surfaces - Google Patents
Methods of coating rubbing surfaces and elements comprising such surfaces Download PDFInfo
- Publication number
- US3705818A US3705818A US889569A US3705818DA US3705818A US 3705818 A US3705818 A US 3705818A US 889569 A US889569 A US 889569A US 3705818D A US3705818D A US 3705818DA US 3705818 A US3705818 A US 3705818A
- Authority
- US
- United States
- Prior art keywords
- layer
- sub
- coating
- wear
- envelope
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000000576 coating method Methods 0.000 title description 31
- 239000011248 coating agent Substances 0.000 title description 30
- 238000000034 method Methods 0.000 title description 20
- 229910052782 aluminium Inorganic materials 0.000 abstract description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 7
- 239000010962 carbon steel Substances 0.000 abstract description 7
- 229910000975 Carbon steel Inorganic materials 0.000 abstract description 6
- 239000004411 aluminium Substances 0.000 abstract description 6
- 229910000907 nickel aluminide Inorganic materials 0.000 abstract description 6
- 239000000843 powder Substances 0.000 abstract description 6
- 239000010941 cobalt Substances 0.000 abstract description 3
- 229910017052 cobalt Inorganic materials 0.000 abstract description 3
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 abstract description 3
- 238000010285 flame spraying Methods 0.000 abstract description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 16
- 239000000126 substance Substances 0.000 description 11
- 229910052759 nickel Inorganic materials 0.000 description 8
- 239000000203 mixture Substances 0.000 description 7
- 229910001234 light alloy Inorganic materials 0.000 description 6
- 238000005507 spraying Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 230000001464 adherent effect Effects 0.000 description 4
- QFXZANXYUCUTQH-UHFFFAOYSA-N ethynol Chemical group OC#C QFXZANXYUCUTQH-UHFFFAOYSA-N 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910000943 NiAl Inorganic materials 0.000 description 3
- NPXOKRUENSOPAO-UHFFFAOYSA-N Raney nickel Chemical compound [Al].[Ni] NPXOKRUENSOPAO-UHFFFAOYSA-N 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 239000010408 film Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000001465 metallisation Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 239000011733 molybdenum Substances 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910001339 C alloy Inorganic materials 0.000 description 1
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 239000010431 corundum Substances 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000000576 supplementary effect Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B53/00—Internal-combustion aspects of rotary-piston or oscillating-piston engines
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
- C23C4/067—Metallic material containing free particles of non-metal elements, e.g. carbon, silicon, boron, phosphorus or arsenic
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B2730/00—Internal-combustion engines with pistons rotating or oscillating with relation to the housing
- F02B2730/09—Arrangements or specially formed elements for engines according to the preceding groups
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Definitions
- the present invention relates to methods of coating rubbing surfaces, especially internal surfaces of crankcasing envelopes, for rotary piston engine, constituted of light alloy and to the elements comprising such surfaces.
- a rubbing surface element especially a crankcasing envelope, of light alloy, for a rotary piston engine, of which the inner surface constitutes the said rubbing surface, said element being adapted so that the abovesaid rubbing surface is covered by a metallic sub-layer and of suitable thickness for obtaining the required resistance to contact pressures and the said sub-layer being covered with a thin wear-resistant coating and characterized in that the metallic sub-layer is constituted by an alloy of carbon steel and a compound of nickel aluminides NiAl and Ni Al of which the proportions by volume may vary from substantially to 70% for steel and, complementarily, from substantially 10% to 30% for the compound of nickel aluminides.
- the thickness of the metallic sub-layer is generally comprised between 0.20 and 0.80 mm.
- the invention consists, apart from these principal features, in certain other features which are employed preferably at the same time and which will be more specifically described below.
- the inner surface 2 is machined to dimensions in the neighbourhood of the final dimensions. Then there is deposited firstly, by projection in an oxy-acetylene flame or a plasma flame, onto the inner surface 2, a metallic sub-layer 3, adherent hard and of a thickness 5 suited to obtaining the required resistance to contact pressures. According to the invention, the materials are sprayed simultaneously by at least two guns.
- the said materials are constituted by steel containing, by weight, from 0.10% to 0.60% of carbon, and by a mixture of powdered nickel and aluminium combining to form nickel aluminides (NiAl, Ni Al) which are alloyed with the carbon steel and give a product having, in addition to its resistance properties to contact pressures, improved properties of wear resistance and of rubbing which render it suitable to make up, to a certain extent, the thin wear resistant coating in the event of deterioration of the latter.
- this layer 3 by chemical means such as electrolytic means a thin wearresistant coating 4 on which it then suflices to effect a slight finishing to obtain the final dimension and surface condition desired.
- a thin binding film 6 formed either of nickel aluminides (NiAl and Ni Al) obtained by spraying separately the mixture of nickel and aluminum powders, or of molybdenum.
- NiAl and Ni Al nickel aluminides
- This projection of molten metal on the surface 2, also called metallisation is generally effected by means of a oxy-acetylene flame gun, supplied with a wire of the metal to be sprayed, or by means of a plasma flame gun, fed by a wire or by a mixture of powders of the metals to be projected.
- Means are provided to ensure a relative movement between the envelope 1 and the assembly of spray-guns so as to cause the whole of the surface to be covered to pass before the one or more guns and to ensure thus a substantially uniform deposit over the whole surface.
- the discharge rates of metal projected from each gun are adjusted in the ratio of the desired proportions for the sublayer 3.
- These proportions may vary by volume from 90% to 70% of steel contained by weight from 0.10% to 0.60% carbon and, complementarily, from 10% to 30% of nickel and aluminium powders mixed in substantially equal parts.
- the sub-layer 3, obtained rapidly by metallisation is finally porous, which favours the attachment of the wearresistant layer subsequently deposited, on the said sublayer, by chemical means such as electrolytic means.
- the said sub-layer After cooling the envelope to ambient temperature which causes the appearance of a prestressing in the sublayer 3 by reason of the different coefficients of expansion for the envelope 1 and the sub-layer 3, the said sub-layer is corrected before receiving the thin wear-resistant layer 4.
- This wear resistant layer 4 is advantageously constituted by a deposit of nickel or of cobalt, favourable to the sliding of the piston segments.
- the thickness of the coating 4 varies between 0.02 and 0.1 mm. Although the deposits by chemical means are effected in relatively slow manner, the slight thickness of the coating renders the duration of the operation acceptable.
- the deposit constituting the wear-resistant layer 4 may be made to include particles of material insoluble in the chemical bath such as the electrolytic bath, used for obtaining the deposit. These particles are of variable dimensions, comprised preferably between 0.02a (microns) and 400 and are selected so as to confer on the wear-resistant layer 4 supplementary properties of hardness and/or of friction.
- the coating thus obtained has numerous advantages.
- the metallic sub-layer 3 ensures a hard and solid seating for the coating 4 which resists prefectly contact pressures and thus enables said coating 4 to last much longer than if it had itself to sustain these stresses alone.
- the spraying of the sublayer at a temperature of the order of 180 C. neighbouring those of the operating conditions, there are reduced precisely those stresses which could appear in the sublayer, on operation, as result of differences between the coefiicients of expansion of the envelope and of the sublayer.
- the composition of the metallic sub-layer 3 is such that in the case of the deterioration of the thin wear-resistant coating 4 the sliding of the segments of cast iron on the said layer 3 remains satisfactory and the coefficient of friction of the said segments on the sublayer 3 is slight.
- the method according to the invention responds therefore well to the object which it is designed to achieve and enables the obtaining in a simple, eco nomical and rapid manner of a rubbing surface coating, especially for rotary piston engine crank-casing envelopes, which is highly resistant to wear.
- the invention is in no way limited to those of its methods of application, nor to those of its methods of production of its various parts, which have been more particularly contemplated; it embraces, on
- the thin wear-resistant coating comprises particles of material insoluble in the bath used for obtaining the said coating, the said particles having a diameter of 0.02;; to 400 1.
- crank-casing envelopes for rotary piston engines, constituted of light alloy, as claimed in claim 6, wherein there is interposed, between the inner surface of the envelope and the sub-layer, a thin film of molybdenum or of nickel aluminides to improve the attachment of the sub-layer.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Combustion & Propulsion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Coating By Spraying Or Casting (AREA)
- Chemical Vapour Deposition (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
TO INCREASE THE WEAR RESISTANCE OF A ROTARY PISTON ENEGINE CASING ENVELOPE THE INNER SURFACE OF THE ENVELOPE IS COATED BY A KEYING FILM AND THEN A RESISTANT SUB-LAYER OF AN ALLOY OF STEEL AND NICKEL ALUMINIDES, THEN BY A THIN WEAR-RESISTANT LAYER OF NICKEL OR COBALT. THE SUB-LAYER IS FORMED BY FLAME-SPRAYING SIMULTANEOUSLY 90% TO 70% BY VOLUME CARBON STEEL WITH 10% TO 30% OF A MIXUTRE OF EQUAL PARTS OF NICKEL AND ALUMINIUM POWDERS.
Description
Dec. 12, GRQSSEAU. METHODS OF COATING RUBBING SURFACES AND ELEMENTS COMPRISING S SURFA Filed Dec. 196
INVENTOR ALBERT GROSS EAU BY ATTORNEYS United States Patent 3,705,818 METHODS OF COATING RUBBING SURFACES AND ELEMENTS COMPRISING SUCH SURFACES Albert Grosseau, Chaville, France, assignor to Socrete Anonyme Automobiles Citroen, Paris, France Filed Dec. 31, 1969, Ser. No. 889,569 Claims priority, appliclegtion France, Dec. 31, 1968,
int. c1. C23c 7700,- B44d 1/16 US. Cl. 117-71 M 7 Claims ABSTRACT OF THE DISCLOSURE The present invention relates to methods of coating rubbing surfaces, especially internal surfaces of crankcasing envelopes, for rotary piston engine, constituted of light alloy and to the elements comprising such surfaces.
It is known that, on the operation of a rotary piston engine, the inner surface of the envelope of the crankcasing is subjected, on the side of the rotary piston and its segments, to considerable contact pressures and to a considerable friction, and it is already known to fix, on this surface, coatings constituted by materials which improve the rubbing and possess high resistance to wear, and which are applied by methods known as electrolytic and/ or chemical means.
It is also known to deposit first of all on the said inner surface of the crank-casing envelope an adherent metallic sub-layer, hard and of suitable thickness for obtaining the required resistance to contact pressures. This metallic sublayer is generally obtained by spraying, by means of an oxyacetylene flame or a plasma flame. There is then applied on this sub-layer, by electrolytic and/or chemical means, a thin wear-resistant coating.
It is an object of the invention, particularly, to render the said methods and elements such that they respond better than up to the present to the various exigencies of practice, especially as regards resistance to wear of the rubbing surfaceand reduction of the coefiicient of friction of the member, such as a rotary piston, which cooperates with the above-said element.
According to the invention, there is provided a method of coating rubbing surfaces, especially internal surfaces of crank-casing envelopes, for rotary piston engines, constituted of light alloy, according to which there is first deposited, by flame projection, on said surfaces previously machined to dimensions in the neighbourhood of the final dimensions, an adherent metallic sub-layer, hard and of considerable thickness for obtaining the required resistance to contract pressures, then, after a slight correction approximating very closely the final dimensions, there is applied on this sub-layer, by electrolytic and/or chemical means, a thin wear-resistant coating on which it then sufiices to effect a slight finishing to obtain the final dimension and surface condition desired, characterized in that to obtain the metallic sub-layer there is simulice taneously projected, by means of at least two guns, on the one hand carbon steel in a proportion by volume of the order of 90% to and on the other hand in complementary proportion by volume of the order of 10 to 30% a mixture in substantially equal parts of powdered nickel and aluminium.
According to another aspect of the invention, there is provided a rubbing surface element, especially a crankcasing envelope, of light alloy, for a rotary piston engine, of which the inner surface constitutes the said rubbing surface, said element being adapted so that the abovesaid rubbing surface is covered by a metallic sub-layer and of suitable thickness for obtaining the required resistance to contact pressures and the said sub-layer being covered with a thin wear-resistant coating and characterized in that the metallic sub-layer is constituted by an alloy of carbon steel and a compound of nickel aluminides NiAl and Ni Al of which the proportions by volume may vary from substantially to 70% for steel and, complementarily, from substantially 10% to 30% for the compound of nickel aluminides.
The thickness of the metallic sub-layer is generally comprised between 0.20 and 0.80 mm.
The invention consists, apart from these principal features, in certain other features which are employed preferably at the same time and which will be more specifically described below.
In order that the invention may be more fully understood, a preferred embodiment of the method and element according to the invention, are described below purely by way of illustrative but non-limiting example, and with reference to the accompanying drawing, in which:
FIG. 1 shows, in transverse section, one embodiment of a crank-case envelope made according to the invention; and
FIG. 2 shows, on a larger scale, a partial cross-section of the coating of the envelope.
Having an envelope 1 for a rotary piston engine crankcasing constituted of light alloy, for example of aluminium alloy, of which the transverse section is in the form of a trochoid with two lobes, and proposing to effect a wear-resistant coating on the inner surface 2 of the envelope 1, the procedure is as follows.
The inner surface 2 is machined to dimensions in the neighbourhood of the final dimensions. Then there is deposited firstly, by projection in an oxy-acetylene flame or a plasma flame, onto the inner surface 2, a metallic sub-layer 3, adherent hard and of a thickness 5 suited to obtaining the required resistance to contact pressures. According to the invention, the materials are sprayed simultaneously by at least two guns. The said materials are constituted by steel containing, by weight, from 0.10% to 0.60% of carbon, and by a mixture of powdered nickel and aluminium combining to form nickel aluminides (NiAl, Ni Al) which are alloyed with the carbon steel and give a product having, in addition to its resistance properties to contact pressures, improved properties of wear resistance and of rubbing which render it suitable to make up, to a certain extent, the thin wear resistant coating in the event of deterioration of the latter. After a slight correction, approaching very closely the final dimensions, there is applied on this layer 3 by chemical means such as electrolytic means a thin wearresistant coating 4 on which it then suflices to effect a slight finishing to obtain the final dimension and surface condition desired.
Before proceding with the spraying properly so-called of the sub-layer 3, the envelope 2 is pre-heated so as to bring it and keep it, at a temperature in the neighborhood of 180 C. Then there is effected, on the inner surface 2, a sanding operation, that is to say that a jet of powdered abrasive such as, for example, of silicon carbide or of corundum, is violently projected against the said surface. The rugosity of the surface 2 is thus increased, which is favourable to the adhesion of the sublayer 3. To increase further this adhesion, there is constituted on the surface 2, by oxy-acetylene flame or by plasma flame, a thin binding film 6, formed either of nickel aluminides (NiAl and Ni Al) obtained by spraying separately the mixture of nickel and aluminum powders, or of molybdenum. There is advantageously given to this thin film which covers the whole of the surface 2, a thickness of 0.02 to 0.05 mm. This projection of molten metal on the surface 2, also called metallisation, is generally effected by means of a oxy-acetylene flame gun, supplied with a wire of the metal to be sprayed, or by means of a plasma flame gun, fed by a wire or by a mixture of powders of the metals to be projected.
Next, there is effected the spraying properly so-called of the sub-layer 3 onto the binding film 6. To this end, there is preferably used, simultaneously, at least two spray-guns supplied, on one hand, by carbon steel, and on the other hand, by a mixture of aluminium and nickel powders, and adjusted to project the molten metals at the same point of the binder film.
Means are provided to ensure a relative movement between the envelope 1 and the assembly of spray-guns so as to cause the whole of the surface to be covered to pass before the one or more guns and to ensure thus a substantially uniform deposit over the whole surface.
In the simultaneous projection by at least two guns, the discharge rates of metal projected from each gun are adjusted in the ratio of the desired proportions for the sublayer 3. These proportions may vary by volume from 90% to 70% of steel contained by weight from 0.10% to 0.60% carbon and, complementarily, from 10% to 30% of nickel and aluminium powders mixed in substantially equal parts. There are effected as many passes as is necessary to obtain a sub-layer 3 of uniform thickness 5 comprised between 0.20 and 0.80 mm. approximately. This thickness confers good resistance to contact pressures developed in the course of operation.
The sub-layer 3, obtained rapidly by metallisation is finally porous, which favours the attachment of the wearresistant layer subsequently deposited, on the said sublayer, by chemical means such as electrolytic means.
After cooling the envelope to ambient temperature which causes the appearance of a prestressing in the sublayer 3 by reason of the different coefficients of expansion for the envelope 1 and the sub-layer 3, the said sub-layer is corrected before receiving the thin wear-resistant layer 4.
This wear resistant layer 4 is advantageously constituted by a deposit of nickel or of cobalt, favourable to the sliding of the piston segments. The thickness of the coating 4 varies between 0.02 and 0.1 mm. Although the deposits by chemical means are effected in relatively slow manner, the slight thickness of the coating renders the duration of the operation acceptable. The deposit constituting the wear-resistant layer 4 may be made to include particles of material insoluble in the chemical bath such as the electrolytic bath, used for obtaining the deposit. These particles are of variable dimensions, comprised preferably between 0.02a (microns) and 400 and are selected so as to confer on the wear-resistant layer 4 supplementary properties of hardness and/or of friction.
Finally, a slight finishing of the wear-resistant coating enables the achievement of the final dimensions and surfa e condition desired.
The coating thus obtained has numerous advantages.
It resists wear very well whilst facilitating sliding of the rotary piston segments in contact therewith, the said segments being constituted of grey pig iron preferably.
In addition, the metallic sub-layer 3 ensures a hard and solid seating for the coating 4 which resists prefectly contact pressures and thus enables said coating 4 to last much longer than if it had itself to sustain these stresses alone. In addition, by effecting the spraying of the sublayer at a temperature of the order of 180 C. neighbouring those of the operating conditions, there are reduced precisely those stresses which could appear in the sublayer, on operation, as result of differences between the coefiicients of expansion of the envelope and of the sublayer.
The production of a coating of this character is economical, due to the method proposed and, in consequence the manufacture of the envelope is relatively cheap. In fact, the sub-layer 3, in spite of its thickness, is obtained rapidly by spraying, which renders the cost of the operation acceptable, although it is practically excluded, by reason of a high cost price due to the slowness of the operations, to obtain such a thickness by electrolytic and/or chemical means. On the other hand, the coating 4, resisting wear well and favourable to the sliding of the cast iron segments, may be obtained at a reasonable cost, due to the fact that it is of slight thickness, by electrolytic and/0r chemical means.
Moreover, the composition of the metallic sub-layer 3 is such that in the case of the deterioration of the thin wear-resistant coating 4 the sliding of the segments of cast iron on the said layer 3 remains satisfactory and the coefficient of friction of the said segments on the sublayer 3 is slight. The method according to the invention responds therefore well to the object which it is designed to achieve and enables the obtaining in a simple, eco nomical and rapid manner of a rubbing surface coating, especially for rotary piston engine crank-casing envelopes, which is highly resistant to wear.
As is self-evident, and as emerges besides already from the preceding description, the invention is in no way limited to those of its methods of application, nor to those of its methods of production of its various parts, which have been more particularly contemplated; it embraces, on
the contrary, all variations, especially those in which the rotary piston engine crank-casing envelope allows a different transverse section from that contemplated, namely trochoidal with two lobes, in the particular example described previously.
What I claim is:
1. A method of coating the internal surfaces of light al- 10y crankcase envelopes, for rotary piston engines, comprising depositing by flame spraying, on the said surfaces, previously machined to approximately the final dimensions, an adherent metallic sub-layer which is hard and resistant to contact pressures, then applying on this sublayer, by chemical means, a wear-resistant coating wherein, to obtain said metallic sub-layer, there is simultaneously projected, by means of at least two spray guns, carbon steel in a proportion by volume of the order of to 70% and in the complementary proportion by volume of the order of 10% to 30% a mixture in substantially equal parts of nickel and aluminium powders.
2. A method according to claim 1, wherein the chemical means used to apply the wear-resistant coating is electrolytic means.
3. A method according to claim 1, wherein the carbon steel has a carbon content comprised between 0.10 and 0.60% by weight.
4. A method according to claim 1 wherein the thin Wear-resistant coating is constituted by nickel or cobalt.
5. A method according to claim 4, wherein the thin wear-resistant coating comprises particles of material insoluble in the bath used for obtaining the said coating, the said particles having a diameter of 0.02;; to 400 1.
6. A method of coating inner surfaces of crank-casing envelopes, for rotary piston engines constituted of light alloy, according to claim 1, wherein the envelope is brought to a temperature of about 180 C., at the moment of projection of the sub-layer, so as to generate, on cooling, a prestressing in this sub-layer.
7. A method of coating inner surfaces of crank-casing envelopes, for rotary piston engines, constituted of light alloy, as claimed in claim 6, wherein there is interposed, between the inner surface of the envelope and the sub-layer, a thin film of molybdenum or of nickel aluminides to improve the attachment of the sub-layer.
References Cited UNITED STATES PATENTS ALFRED L. LEAVITT, Primary Examiner C. K. WEIFFENBACH, Assistant Examiner US. Cl. X.R.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR182897 | 1968-12-31 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3705818A true US3705818A (en) | 1972-12-12 |
Family
ID=8659815
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US889569A Expired - Lifetime US3705818A (en) | 1968-12-31 | 1969-12-31 | Methods of coating rubbing surfaces and elements comprising such surfaces |
Country Status (6)
Country | Link |
---|---|
US (1) | US3705818A (en) |
JP (1) | JPS502853B1 (en) |
DE (1) | DE1965754A1 (en) |
ES (1) | ES374366A1 (en) |
FR (1) | FR1600297A (en) |
GB (1) | GB1262570A (en) |
Cited By (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3779720A (en) * | 1971-11-17 | 1973-12-18 | Chromalloy American Corp | Plasma sprayed titanium carbide tool steel coating |
US3833321A (en) * | 1973-07-05 | 1974-09-03 | Ford Motor Co | Wear-resistant coating for rotary engine side housing and method of making |
US3833320A (en) * | 1973-07-05 | 1974-09-03 | Ford Motor Co | Coating for apex seals of rotary engines and method of making |
US3836394A (en) * | 1971-07-29 | 1974-09-17 | Alusuisse | Method of manufacture of a conductor rail |
US3837894A (en) * | 1972-05-22 | 1974-09-24 | Union Carbide Corp | Process for producing a corrosion resistant duplex coating |
US3851627A (en) * | 1972-05-16 | 1974-12-03 | Toyo Kogyo Co | Rotor housing structure for rotary piston engine |
US3853602A (en) * | 1971-12-03 | 1974-12-10 | Nippon Piston Ring Co Ltd | Sliding member |
US3886637A (en) * | 1971-11-17 | 1975-06-03 | Chromalloy American Corp | Method of producing heat treatable titanium carbide tool steel coatings on cylinders of internal combustion engines |
US3888746A (en) * | 1974-01-04 | 1975-06-10 | Ford Motor Co | Method of providing an intermediate steel layer for chrome plating on rotor housings |
US3890069A (en) * | 1973-07-05 | 1975-06-17 | Ford Motor Co | Coating for rotary engine rotor housings and method of making |
US3918137A (en) * | 1973-07-05 | 1975-11-11 | Ford Motor Co | Wear-resistant coating for rotary engine side housing and method of making |
US3920360A (en) * | 1974-05-30 | 1975-11-18 | Gen Motors Corp | Aluminum-iron composite rotor housing for a rotary combustion engine and method of making the same |
US3981688A (en) * | 1973-07-05 | 1976-09-21 | Ford Motor Company | Coating for rotary engine rotor housings and method of making |
US4044589A (en) * | 1973-07-20 | 1977-08-30 | Vandervell Products Limited | Rotary piston machines |
US4080122A (en) * | 1974-07-06 | 1978-03-21 | Klockner-Humboldt-Deutz Aktiengesellschaft | Displacement pump, especially cell pump, for compressing gaseous media |
US4099490A (en) * | 1972-02-01 | 1978-07-11 | Daimler-Benz Aktiengesellschaft | Method for producing a housing casing for a rotary piston internal combustion engine |
US4715799A (en) * | 1985-04-25 | 1987-12-29 | Wankel Gmbh | Composite construction of casing for rotary piston engine |
US6250900B1 (en) * | 1999-11-15 | 2001-06-26 | Sauer-Danfoss Inc. | Positive displacement hydraulic unit with near-zero side clearance |
US20060153722A1 (en) * | 2004-12-18 | 2006-07-13 | Luk Fahrzeug-Hydraulik Gmbh & Co. Kg | Pump with side surface coating |
US20070259199A1 (en) * | 2003-05-14 | 2007-11-08 | Volker Arnhold | Oil pump |
US20090068495A1 (en) * | 2007-09-06 | 2009-03-12 | Dembowski Thaddeus J | Methods and Systems for Re-Metallizing Weld Area in Steel Electrical Conduit |
US20150017044A1 (en) * | 2012-02-08 | 2015-01-15 | Eads Deutschland Gmbh | Rotary piston engine and method for producing a rotary piston engine |
US11333068B1 (en) * | 2021-03-23 | 2022-05-17 | Pratt & Whitney Canada Corp. | Side wall for rotary engine housing |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4040975A1 (en) * | 1990-12-20 | 1992-06-25 | Audi Ag | Cylinder block prodn. of light metal alloy - comprising application of an abrasion resistant coating to the support collars |
-
1968
- 1968-12-31 FR FR182897A patent/FR1600297A/fr not_active Expired
-
1969
- 1969-12-09 ES ES374366A patent/ES374366A1/en not_active Expired
- 1969-12-29 GB GB63111/69A patent/GB1262570A/en not_active Expired
- 1969-12-30 JP JP702020A patent/JPS502853B1/ja active Pending
- 1969-12-31 US US889569A patent/US3705818A/en not_active Expired - Lifetime
- 1969-12-31 DE DE19691965754 patent/DE1965754A1/en active Pending
Cited By (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3836394A (en) * | 1971-07-29 | 1974-09-17 | Alusuisse | Method of manufacture of a conductor rail |
US3886637A (en) * | 1971-11-17 | 1975-06-03 | Chromalloy American Corp | Method of producing heat treatable titanium carbide tool steel coatings on cylinders of internal combustion engines |
US3779720A (en) * | 1971-11-17 | 1973-12-18 | Chromalloy American Corp | Plasma sprayed titanium carbide tool steel coating |
US3853602A (en) * | 1971-12-03 | 1974-12-10 | Nippon Piston Ring Co Ltd | Sliding member |
US4099490A (en) * | 1972-02-01 | 1978-07-11 | Daimler-Benz Aktiengesellschaft | Method for producing a housing casing for a rotary piston internal combustion engine |
US3851627A (en) * | 1972-05-16 | 1974-12-03 | Toyo Kogyo Co | Rotor housing structure for rotary piston engine |
US3837894A (en) * | 1972-05-22 | 1974-09-24 | Union Carbide Corp | Process for producing a corrosion resistant duplex coating |
US3981688A (en) * | 1973-07-05 | 1976-09-21 | Ford Motor Company | Coating for rotary engine rotor housings and method of making |
US3890069A (en) * | 1973-07-05 | 1975-06-17 | Ford Motor Co | Coating for rotary engine rotor housings and method of making |
US3918137A (en) * | 1973-07-05 | 1975-11-11 | Ford Motor Co | Wear-resistant coating for rotary engine side housing and method of making |
US3833320A (en) * | 1973-07-05 | 1974-09-03 | Ford Motor Co | Coating for apex seals of rotary engines and method of making |
US3833321A (en) * | 1973-07-05 | 1974-09-03 | Ford Motor Co | Wear-resistant coating for rotary engine side housing and method of making |
US4044589A (en) * | 1973-07-20 | 1977-08-30 | Vandervell Products Limited | Rotary piston machines |
US3888746A (en) * | 1974-01-04 | 1975-06-10 | Ford Motor Co | Method of providing an intermediate steel layer for chrome plating on rotor housings |
US3920360A (en) * | 1974-05-30 | 1975-11-18 | Gen Motors Corp | Aluminum-iron composite rotor housing for a rotary combustion engine and method of making the same |
US4080122A (en) * | 1974-07-06 | 1978-03-21 | Klockner-Humboldt-Deutz Aktiengesellschaft | Displacement pump, especially cell pump, for compressing gaseous media |
US4715799A (en) * | 1985-04-25 | 1987-12-29 | Wankel Gmbh | Composite construction of casing for rotary piston engine |
US6250900B1 (en) * | 1999-11-15 | 2001-06-26 | Sauer-Danfoss Inc. | Positive displacement hydraulic unit with near-zero side clearance |
US20070259199A1 (en) * | 2003-05-14 | 2007-11-08 | Volker Arnhold | Oil pump |
US20060153722A1 (en) * | 2004-12-18 | 2006-07-13 | Luk Fahrzeug-Hydraulik Gmbh & Co. Kg | Pump with side surface coating |
US8066497B2 (en) * | 2004-12-18 | 2011-11-29 | Luk Fahrzeug-Hydraulik Gmbh & Co. Kg | Pump with side surface coating |
US20090068495A1 (en) * | 2007-09-06 | 2009-03-12 | Dembowski Thaddeus J | Methods and Systems for Re-Metallizing Weld Area in Steel Electrical Conduit |
US20150017044A1 (en) * | 2012-02-08 | 2015-01-15 | Eads Deutschland Gmbh | Rotary piston engine and method for producing a rotary piston engine |
US11333068B1 (en) * | 2021-03-23 | 2022-05-17 | Pratt & Whitney Canada Corp. | Side wall for rotary engine housing |
Also Published As
Publication number | Publication date |
---|---|
GB1262570A (en) | 1972-02-02 |
DE1965754A1 (en) | 1970-09-17 |
ES374366A1 (en) | 1972-04-01 |
JPS502853B1 (en) | 1975-01-29 |
FR1600297A (en) | 1970-07-20 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3705818A (en) | Methods of coating rubbing surfaces and elements comprising such surfaces | |
US3674544A (en) | Methods of coating surfaces and in elements comprising such surfaces | |
US5592927A (en) | Method of depositing and using a composite coating on light metal substrates | |
US5958521A (en) | Method of depositing a thermally sprayed coating that is graded between being machinable and being wear resistant | |
US3313633A (en) | High temperature flame spray powder | |
US5080056A (en) | Thermally sprayed aluminum-bronze coatings on aluminum engine bores | |
US3378392A (en) | High temperature flame spray powder and process | |
US4725508A (en) | Composite hard chromium compounds for thermal spraying | |
DE10324279B4 (en) | Use of FeC alloy to renew the surface of cylinder liners | |
US3935797A (en) | Wear and seizure resistant aluminum alloy piston | |
US2588422A (en) | Application of spray metal linings for aluminum engine cylinders of or for reciprocating engines | |
US4077637A (en) | Ceramic coated piston rings | |
CN107810290B (en) | Method for coating a cylinder running surface of a cylinder crankcase, cylinder crankcase with a coated cylinder running surface, and engine | |
US3077659A (en) | Coated aluminum cylinder wall and a method of making | |
JP5222553B2 (en) | Abrasion resistant alloy powder and coating | |
CA1177283A (en) | Layer resistant to frictional wear and produced by thermal spraying | |
US7767267B2 (en) | Method of producing a coated valve retainer | |
US3545944A (en) | Composite metal article having an intermediate bonding layer of nickel aluminide | |
JP2001503816A (en) | Coated wear-resistant parts of internal combustion engines, in particular piston rings and methods for their production | |
US3413136A (en) | Abradable coating | |
GB2221413A (en) | Process for coating a surface for contact with molten metal | |
KR102466364B1 (en) | PISTON RING WITH SHOT-PEENED RUNNING-IN LAYER AND METHOD FOR THE PRODUCTION THEREOF | |
US3165823A (en) | Metallic surface coating and method for making the same | |
US7401586B2 (en) | Valve seat rings made of basic Co or Co/Mo alloys, and production thereof | |
JPH101766A (en) | Sprayed coating film excellent in corrosion resistance and flawing resistance |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: USX CORPORATION, A CORP. OF DE, STATELESS Free format text: MERGER;ASSIGNOR:UNITED STATES STEEL CORPORATION (MERGED INTO);REEL/FRAME:005060/0960 Effective date: 19880112 |