EP2729596A1 - Method for producing a cylinder liner surface and cylinder liner - Google Patents

Method for producing a cylinder liner surface and cylinder liner

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Publication number
EP2729596A1
EP2729596A1 EP12755776.7A EP12755776A EP2729596A1 EP 2729596 A1 EP2729596 A1 EP 2729596A1 EP 12755776 A EP12755776 A EP 12755776A EP 2729596 A1 EP2729596 A1 EP 2729596A1
Authority
EP
European Patent Office
Prior art keywords
zinc
cylinder liner
coating
honing
pocket
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.)
Granted
Application number
EP12755776.7A
Other languages
German (de)
French (fr)
Other versions
EP2729596B1 (en
Inventor
Ulrich Bischofberger
Stefan Gaiselmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mahle International GmbH
Original Assignee
Mahle International GmbH
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Filing date
Publication date
Application filed by Mahle International GmbH filed Critical Mahle International GmbH
Publication of EP2729596A1 publication Critical patent/EP2729596A1/en
Application granted granted Critical
Publication of EP2729596B1 publication Critical patent/EP2729596B1/en
Not-in-force legal-status Critical Current
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Classifications

    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C4/00Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/02Pretreatment of the material to be coated, e.g. for coating on selected surface areas
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02FCYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00Cylinders; Cylinder heads 
    • F02F1/004Cylinder liners
    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C24/00Coating starting from inorganic powder
    • C23C24/02Coating starting from inorganic powder by application of pressure only
    • C23C24/04Impact or kinetic deposition of particles
    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C26/00Coating not provided for in groups C23C2/00 - C23C24/00
    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C4/00Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/04Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
    • C23C4/06Metallic material
    • C23C4/08Metallic material containing only metal elements
    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C4/00Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/18After-treatment
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02FCYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00Cylinders; Cylinder heads 
    • F02F1/18Other cylinders
    • F02F1/20Other cylinders characterised by constructional features providing for lubrication

Definitions

  • the present invention relates to a method for producing a cylinder surface and a cylinder liner for a cylinder crankcase of an internal combustion engine.
  • Cylinder liners are usually made of a steel material or a cast iron material.
  • cylinder liners made of a cast iron material are susceptible to corrosion.
  • galvanically provide the running surfaces of cylinder liners with a corrosion and abrasion resistant coating, for example based on chromium.
  • this has a disadvantageous effect on the material costs and on the costs of the production process.
  • the present invention is therefore based on the object to increase the corrosion resistance of cylinder liners made of a cast iron material. Furthermore, the material production costs are to be reduced.
  • the solution consists of a process comprising the following process steps: (a) pre-honing the inner surface of a cylinder liner made of a cast iron material to form depressions in the surface; (b) applying a zinciferous coating material to the pre-honed surface; (c) finish-coating the coated surface such that the zinc-containing coating material remains only in the recesses formed by pre-honing.
  • the present invention further provides a cylinder liner made of a cast iron material for a cylinder crankcase that can be produced by the process according to the invention.
  • the inventive method is characterized in that the protective effect against corrosive attack achieved by a cathodic protection effect becomes.
  • zinc is oxidized instead of the iron contained in the cast iron material. Only after the zinc contained in the coating is completely oxidized, a corrosive attack on the iron can be observed. As a result, corrosive damage to the cast iron material is substantially delayed and the service life of the cylinder liner treated according to the invention is considerably increased.
  • the pregone surface is suitably film-galvanized in step (b), i. provided with the zinc-containing coating without heat.
  • Suitable zinc-containing coating materials for use in step (b) are, in particular, inorganic-based zinc coatings, for example water-based inorganic zinc silicates with zinc powder containing at least 92% by weight of zinc. These zinc coatings are temperature resistant up to 600 ° C. A typical product on the market is the zinc varnish "Aquazinga” from Zinga, Germany.
  • step (b) the zinc-containing coating is applied by means of a stripping process in order to ensure that the depressions introduced into the surface by pre-honing are filled as completely as possible with the coating material.
  • the coating material can be applied in step (b) in a conventional manner but also by means of thermal spraying, by means of cold gas spraying or by means of vacuum suction blasting using a zinc-containing wire or a zinc-containing powder.
  • a particularly preferred embodiment of the method according to the invention is that pocket-shaped depressions are introduced into the pre-honed surface after pre-honing and before application of the zinc-containing coating material.
  • the pocket-shaped depressions are advantageously introduced with a maximum depth of 100 ⁇ in the surface and / or with a diameter of 30 ⁇ to 50 ⁇ in the surface to allow a uniform distribution on the surface.
  • the depressions are preferably introduced into the surface with an area fraction of 2% to 10%. Thus, an optimal ratio of corrosion protection and consumption of coating materials can be achieved.
  • the pocket-shaped depressions can, for example, be introduced into the surface by means of laser beam treatment.
  • the inner surface of a cylinder liner made of a commercially available cast iron material is processed according to the invention.
  • an internal drilling by means of a boring tool initially takes place in a manner known per se.
  • the inner diameter is adjusted to a defined dimension, a defined cylindricity and a defined roughness.
  • the inner surface of the cylinder liner is prepared for the subsequent process steps.
  • the inner surface of the cylinder liner is machined using a honing tool by means of roughing, the honing stones of the honing tool removing material from the inner surface of the cylinder liner.
  • the accuracy of the inner diameter in terms of dimension, cylindricity and roughness is improved.
  • honing marks are introduced into the inner surface of the cylinder liner
  • the number of recesses, their depth and their distribution on the inner surface of the cylinder liner can be determined in a manner known per se.
  • the inner surface of the cylinder liner is spray coated with a zinc paint.
  • the recesses introduced by the honing tool are filled with the zinc varnish.
  • a base is formed in the next process step.
  • the zinc paint is removed over the surface of the recesses until the material of the cylinder liner has been reached.
  • a defined amount of material of the cylinder liner is removed.
  • a defined area ratio of the zinc coating is set. At the same time, the roughness of the inner surface is reduced and the cylindricity is improved.
  • a plateau lifting takes place in a manner known per se, from which a plateau-like leveling of the surface structure of the inner surface of the cylinder liner results, depending on the selected grain size of the honing stones and the amount of material removal. Furthermore, the final desired areal proportion of the zinc coating is adjusted and the cylindricity is optimized.
  • an inner surface of a cast iron material is processed as described above.
  • the only difference after roughing and before coating is a further surface treatment by means of laser beams for the introduction of additional pocket-shaped depressions in the honed inner surface of the cylinder liner.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Plasma & Fusion (AREA)
  • Physics & Mathematics (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)

Abstract

The invention relates to a method for producing a cylinder liner surface for a cylinder crankcase of an internal combustion engine, characterised by the following method steps: (a) preliminary honing of the inner surface of a cylinder liner consisting of a cast iron material to form depressions in the surface; (b) application of a coating material containing zinc to said honed surface; (c) final honing of the coated surface in such a way that the coating material containing zinc remains only in the depressions formed by the preliminary honing.

Description

Verfahren zur Herstellung einer Zylinderlauffläche sowie Zylinderlaufbuchse  Method for producing a cylinder surface and cylinder liner
Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung einer Zylinderlauffläche sowie eine Zylinderlaufbuchse für ein Zylinderkurbelgehäuse eines Verbrennungsmotors. The present invention relates to a method for producing a cylinder surface and a cylinder liner for a cylinder crankcase of an internal combustion engine.
Zylinderlaufbuchsen werden in der Regel aus einem Stahlwerkstoff oder einem Gusseisenwerkstoff hergestellt. Zylinderlaufbuchsen aus einem Gusseisenwerkstoff sind allerdings anfällig für Korrosion. Es ist zwar bekannt, die Laufflächen von Zylinderlaufbuchsen galvanisch mit einer korrosions- und abrasionsbeständigen Be- schichtung zu versehen, bspw. auf der Basis von Chrom. Dies wirkt sich allerdings nachteilig auf die Materialkosten sowie auf die Kosten des Herstellungsverfahrens aus. Cylinder liners are usually made of a steel material or a cast iron material. However, cylinder liners made of a cast iron material are susceptible to corrosion. Although it is known to galvanically provide the running surfaces of cylinder liners with a corrosion and abrasion resistant coating, for example based on chromium. However, this has a disadvantageous effect on the material costs and on the costs of the production process.
Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, die Korrosionsbeständigkeit von Zylinderlaufbuchsen aus einem Gusseisenwerkstoff zu erhöhen. Ferner sollen die Material - Herstellungskosten reduziert werden. The present invention is therefore based on the object to increase the corrosion resistance of cylinder liners made of a cast iron material. Furthermore, the material production costs are to be reduced.
Die Lösung besteht in einem Verfahren mit den folgenden Verfahrensschritten: (a) Vorhonen der inneren Oberfläche einer Zylinderlaufbuchse aus einem Gusseisenwerkstoff unter Ausbildung von Vertiefungen in der Oberfläche; (b) Auftragen eines zinkhaltigen Beschichtungswerkstoffs auf die vorgehonte Oberfläche; (c) Fertighonen der beschichteten Oberfläche, derart, dass der zinkhaltige Beschichtungswerkstoff lediglich in den durch das Vorhonen gebildeten Vertiefungen verbleibt. The solution consists of a process comprising the following process steps: (a) pre-honing the inner surface of a cylinder liner made of a cast iron material to form depressions in the surface; (b) applying a zinciferous coating material to the pre-honed surface; (c) finish-coating the coated surface such that the zinc-containing coating material remains only in the recesses formed by pre-honing.
Gegenstand der vorliegenden Erfindung ist ferner eine nach dem erfindungsgemäßen Verfahren herstellbare Zylinderlaufbuchse aus einem Gusseisenwerkstoff für ein Zylinderkurbelgehäuse. The present invention further provides a cylinder liner made of a cast iron material for a cylinder crankcase that can be produced by the process according to the invention.
Das erfindungsgemäße Verfahren zeichnet sich dadurch aus, dass die Schutzwirkung gegen einen korrosiven Angriff durch eine kathodische Schutzwirkung erreicht wird. Während des Korrosionsprozesses wird zunächst Zink anstelle des im Gusseisenwerkstoff enthaltenen Eisen oxidiert wird. Erst nachdem das in der Beschichtung enthaltene Zink vollständig oxidiert ist, wird ein korrosiver Angriff auf das Eisen beobachtet werden können. Im Ergebnis wird eine korrosive Schädigung des Gusseisenwerkstoffs wesentlich verzögert und die Lebensdauer der erfindungsgemäß behandelten Zylinderlaufbuchse erheblich erhöht. The inventive method is characterized in that the protective effect against corrosive attack achieved by a cathodic protection effect becomes. During the corrosion process, zinc is oxidized instead of the iron contained in the cast iron material. Only after the zinc contained in the coating is completely oxidized, a corrosive attack on the iron can be observed. As a result, corrosive damage to the cast iron material is substantially delayed and the service life of the cylinder liner treated according to the invention is considerably increased.
Mit dem erfindungsgemäßen Verfahren wird eine Beschichtung auf der Innenfläche der Zylinderlaufbuchse erhalten, in der der zinkhaltige Beschichtungswerkstoff lediglich in den Vertiefungen verbleibt, die durch das Vorhonen in die Oberfläche eingebracht wurden. Somit wird mit einem sehr geringen Aufwand an Beschichtungswerkstoff ein wirksamer Korrosionsschutz erzielt. With the method according to the invention, a coating is obtained on the inner surface of the cylinder liner, in which the zinc-containing coating material remains only in the depressions, which were introduced by the pre-honing in the surface. Thus, an effective corrosion protection is achieved with a very low cost of coating material.
Vorteilhafte Weiterbildungen ergeben sich aus den Unteransprüchen. Advantageous developments emerge from the subclaims.
Die vorgehonte Oberfläche wird in Schritt (b) zweckmäßigerweise filmverzinkt, d.h. ohne Wärmeeinwirkung mit der zinkhaltigen Beschichtung versehen. The pregone surface is suitably film-galvanized in step (b), i. provided with the zinc-containing coating without heat.
Geeignete zinkhaltige Beschichtungswerkstoffe zur Verwendung in Schritt (b) sind insbesondere Zinklacke auf anorganischer Basis, bspw. wasserbasierte anorganische Zinksilikate mit Zinkpulver, die mindestens 92 Gew.-% Zink enthalten. Diese Zinklacke sind bis 600°C temperaturbeständig. Ein typisches auf dem Markt befindliches Produkt ist der Zinklack„Aquazinga" der Fa. Zinga, Deutschland. Suitable zinc-containing coating materials for use in step (b) are, in particular, inorganic-based zinc coatings, for example water-based inorganic zinc silicates with zinc powder containing at least 92% by weight of zinc. These zinc coatings are temperature resistant up to 600 ° C. A typical product on the market is the zinc varnish "Aquazinga" from Zinga, Germany.
Vorzugsweise wird in Schritt (b) die zinkhaltige Beschichtung mittels eines Abstreifverfahrens aufgebracht, um zu gewährleisten, dass die durch das Vorhonen in die Oberfläche eingebrachten Vertiefungen möglichst vollständig mit dem Beschichtungswerkstoff gefüllt werden. Preferably, in step (b), the zinc-containing coating is applied by means of a stripping process in order to ensure that the depressions introduced into the surface by pre-honing are filled as completely as possible with the coating material.
Der Beschichtungswerkstoff kann in Schritt (b) in an sich bekannter Weise aber auch mittels thermischem Spritzen, mittels Kaltgasspritzen oder mittels Vakuum- Saugstrahlen unter Verwendung eines zinkhaltigen Drahtes oder eines zinkhaltigen Pulvers aufgebracht werden. Eine besonders bevorzugte Ausgestaltung des erfindungsgemäßen Verfahrens besteht darin, dass nach dem Vorhonen und vor dem Aufbringen des zinkhaltigen Beschichtungswerkstoffes taschenförmige Vertiefungen in die vorgehonte Oberfläche eingebracht werden. Derartige Vertiefungen oder„Taschen" bewirken, dass nach dem Fertighonen eine größere Menge an zinkhaltigem Beschichtungsmittei auf der fertigen Lauffläche der Zylinderlaufbuchse verbleibt, da das zinkhaltige Beschichtungsmittei sowohl in den durch das Vorhonen in die Oberfläche eingebrachten Vertiefungen als auch in den im Anschluss an das Vorhonen in die Oberfläche eingebrachten taschenförmigen Vertiefungen verbleibt. The coating material can be applied in step (b) in a conventional manner but also by means of thermal spraying, by means of cold gas spraying or by means of vacuum suction blasting using a zinc-containing wire or a zinc-containing powder. A particularly preferred embodiment of the method according to the invention is that pocket-shaped depressions are introduced into the pre-honed surface after pre-honing and before application of the zinc-containing coating material. Such recesses or "pockets" cause after finishing honing a larger amount of zinc-containing Beschichtungsmittei remains on the finished running surface of the cylinder liner, since the zinc-containing Beschichtungsmittei both in the introduced by the pre-honing in the surface depressions and in the following after the pre-honing remains in the surface introduced pocket-shaped depressions.
Die taschenförmigen Vertiefungen werden zweckmäßigerweise mit einer maximalen Tiefe von 100μιτι in die Oberfläche und/oder mit einem Durchmesser von 30μιτι bis 50μιτι in die Oberfläche eingebracht, um eine gleichmäßige Verteilung auf der Oberfläche zu ermöglichen. The pocket-shaped depressions are advantageously introduced with a maximum depth of 100μιτι in the surface and / or with a diameter of 30μιτι to 50μιτι in the surface to allow a uniform distribution on the surface.
Bevorzugt werden die Vertiefungen mit einem Flächenanteil von 2% bis 10% in die Oberfläche eingebracht. Damit kann ein optimales Verhältnis von Korrosionsschutz und Verbrauch von Beschichtungsmitteln erreicht werden. The depressions are preferably introduced into the surface with an area fraction of 2% to 10%. Thus, an optimal ratio of corrosion protection and consumption of coating materials can be achieved.
Die taschenförmigen Vertiefungen können bspw. mittels Laserstrahlbehandlung in die Oberfläche eingebracht werden. The pocket-shaped depressions can, for example, be introduced into the surface by means of laser beam treatment.
Ausführungsbeispiele der vorliegenden Erfindung werden im Folgenden näher beschrieben. Embodiments of the present invention will be described in more detail below.
Die innere Oberfläche einer Zylinderlaufbuchse aus einem handelsüblichen Gusseisenwerkstoff wird erfindungsgemäß bearbeitet. Dazu erfolgt zunächst in an sich bekannter Weise ein Innenbohren mittels eines Aufbohrwerkzeugs. Dabei wird der Innendurchmesser auf ein definiertes Abmaß, eine definierte Zylindrizität und eine definierte Rauheit eingestellt. Damit wird die innere Oberfläche der Zylinderlaufbuchse auf den nachfolgenden Verfahrensschritte vorbereitet. Im anschließenden Verfahrensschritt wird die innere Oberfläche der Zylinderlaufbuchse unter Verwendung eines Honwerkzeugs mittels Schrupphonen bearbeitet, wobei die Honleisten des Honwerkzeugs Material von der inneren Oberfläche der Zylinderlaufbuchse abtragen. Dabei wird die Genauigkeit des Innendurchmessers in Bezug auf Abmaß, Zylindrizität und Rauheit verbessert. Zugleich werden definierte Vertiefungen („Honriefen") in die innere Oberfläche der Zylinderlaufbuchse eingebracht. Durch die Wahl der Körnung der Honleisten können die Anzahl der Vertiefungen, ihre Tiefe und ihre Verteilung auf der inneren Oberfläche der Zylinderlaufbuchse in an sich bekannter Weise bestimmt werden. The inner surface of a cylinder liner made of a commercially available cast iron material is processed according to the invention. For this purpose, an internal drilling by means of a boring tool initially takes place in a manner known per se. The inner diameter is adjusted to a defined dimension, a defined cylindricity and a defined roughness. Thus, the inner surface of the cylinder liner is prepared for the subsequent process steps. In the subsequent process step, the inner surface of the cylinder liner is machined using a honing tool by means of roughing, the honing stones of the honing tool removing material from the inner surface of the cylinder liner. The accuracy of the inner diameter in terms of dimension, cylindricity and roughness is improved. At the same time, defined recesses ("honing marks") are introduced into the inner surface of the cylinder liner By selecting the grain size of the honing stones, the number of recesses, their depth and their distribution on the inner surface of the cylinder liner can be determined in a manner known per se.
Im Anschluss an das Schrupphonen wird die innere Oberfläche der Zylinderlaufbuchse mit einem Zinklack mittels Spritzauftrag beschichtet. Dabei werden die vom Honwerkzeug eingebrachten Vertiefungen mit dem Zinklack gefüllt. Following roughing, the inner surface of the cylinder liner is spray coated with a zinc paint. The recesses introduced by the honing tool are filled with the zinc varnish.
Nach dem Aushärten des Zinklacks erfolgt im nächsten Verfahrensschritt ein Basishonen. Dabei wird zunächst der Zinklack außerhalb der Vertiefungen flächig abgetragen, bis der Werkstoff der Zylinderlaufbuchse erreicht ist. Anschließend wird eine definierte Menge Werkstoff der Zylinderlaufbuchse abgetragen. Im Ergebnis verbleibt nur der in den Vertiefungen angesammelte Zinklack im Bereich der inneren Oberfläche der Zylinderlaufbuchse. Durch die Wahl der Körnung der Honleisten und der Menge des abgetragenen Werkstoffs der Zylinderlaufbuchse wird ein definierter Flächenanteil des Zinklacks eingestellt. Zugleich wird die Rauheit der inneren Oberfläche reduziert und die Zylindrizität verbessert. After the zinc varnish has hardened, a base is formed in the next process step. In this case, first of all the zinc paint is removed over the surface of the recesses until the material of the cylinder liner has been reached. Subsequently, a defined amount of material of the cylinder liner is removed. As a result, only the zinc coating accumulated in the recesses remains in the region of the inner surface of the cylinder liner. By choosing the grain size of the honing stones and the amount of removed material of the cylinder liner, a defined area ratio of the zinc coating is set. At the same time, the roughness of the inner surface is reduced and the cylindricity is improved.
In einem abschließenden Verfahrensschritt erfolgt in an sich bekannter Weise ein Plateauhonen, woraus, in Abhängigkeit von der ausgewählten Körnung der Honleisten und der Menge des Werkstoffabtrags eine plateauartige Einebnung der Oberflächenstruktur der inneren Oberfläche der Zylinderlaufbuchse resultiert. Ferner werden der endgültige gewünschte Flächenanteil des Zinklacks eingestellt und die Zylindrizität optimiert. In a final process step, a plateau lifting takes place in a manner known per se, from which a plateau-like leveling of the surface structure of the inner surface of the cylinder liner results, depending on the selected grain size of the honing stones and the amount of material removal. Furthermore, the final desired areal proportion of the zinc coating is adjusted and the cylindricity is optimized.
Die Parameter dieser beispielhaften Bearbeitung der inneren Oberfläche einer Zylinderlaufbuchse sind der Tabelle 1 zu entnehmen. Tabelle 1 The parameters of this exemplary machining of the inner surface of a cylinder liner are shown in Table 1. Table 1
In einem weiteren Ausführungsbeispiel wird eine innere Oberfläche aus einem Gusseisenwerkstoff wie oben beschrieben bearbeitet. Als einziger Unterschied findet nach dem Schrupphonen und vor dem Beschichten eine weitere Oberflächenbehandlung mittels Laserstrahlen zum Einbringen von zusätzlichen taschenförmigen Vertiefungen in die gehonte innere Oberfläche der Zylinderlaufbuchse. In another embodiment, an inner surface of a cast iron material is processed as described above. The only difference after roughing and before coating is a further surface treatment by means of laser beams for the introduction of additional pocket-shaped depressions in the honed inner surface of the cylinder liner.
Die Parameter dieser beispielhaften Bearbeitung der inneren Oberfläche einer Zylinderlaufbuchse sind der Tabelle 2 zu entnehmen. The parameters of this exemplary machining of the inner surface of a cylinder liner are shown in Table 2.
Tabelle 2 Table 2
InnenSchruppLaserBasisPlateau¬InnenSchruppLaserBasisPlateau¬
Parameter Beschichten Coating parameters
bohren honen bearbeitung honen honen drilling honing processing honing
Materialabtrag material removal
radial [pm] 500 200 - - 50 3 radial [pm] 500 200 - - 50 3
Zylindrizität cylindricity
[pm] 140 12 - - 10 8 [pm] 140 12 - - 10 8
Beschichtung coating
Flächenanteil  area proportion
[%] 100 10,5 10 [%] 100 10.5 10
Rauheit Rz Roughness Rz
[pm] 45 35 100 10 5 3  [pm] 45 35 100 10 5 3

Claims

Patentansprüche claims
1. Verfahren zur Herstellung einer Zylinderlauffläche für ein Zylinderkurbelgehäuse eines Verbrennungsmotors, gekennzeichnet durch die folgenden Verfahrensschritte: 1. A method for producing a cylinder surface for a cylinder crankcase of an internal combustion engine, characterized by the following method steps:
(a) Vorhonen der inneren Oberfläche einer Zylinderlaufbuchse aus einem Gusseisenwerkstoff unter Ausbildung von Vertiefungen in der Oberfläche; (a) pre-honing the inner surface of a cylinder liner made of a cast iron material to form depressions in the surface;
(b) Auftragen eines zinkhaltigen Beschichtungswerkstoffs auf die vorgehonte Oberfläche; (b) applying a zinciferous coating material to the pre-honed surface;
(c) Fertighonen der beschichteten Oberfläche, derart, dass der zinkhaltige Beschichtungswerkstoff lediglich in den durch das Vorhonen gebildeten Vertiefungen verbleibt.  (c) finish-coating the coated surface such that the zinc-containing coating material remains only in the recesses formed by pre-honing.
2. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass in Schritt (b) die vorgehonte Oberfläche filmverzinkt wird. 2. The method according to claim 1, characterized in that in step (b) the preharged surface is zinc-plated.
3. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass in Schritt (b) ein Zinklack auf anorganischer Basis verwendet wird. 3. The method according to claim 1, characterized in that in step (b) a zinc coating is used on an inorganic basis.
4. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass in Schritt (b) die zinkhaltige Beschichtung mittels eines Abstreifverfahrens aufgebracht wird. 4. The method according to claim 1, characterized in that in step (b) the zinc-containing coating is applied by means of a stripping process.
5. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass in Schritt (b) der Beschichtungswerkstoff mittels thermischem Spritzen, mittels Kaltgasspritzen oder mittels Vakuum-Saugstrahlen unter Verwendung eines zinkhaltigen Drahtes oder eines zinkhaltigen Pulvers aufgebracht wird. 5. The method according to claim 1, characterized in that in step (b) the coating material is applied by means of thermal spraying, by means of cold gas spraying or by means of vacuum suction blasting using a zinc-containing wire or a zinc-containing powder.
6. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass zwischen Schritt (a) und Schritt (b) taschenförmige Vertiefungen in die vorgehonte Oberfläche eingebracht werden. 6. The method according to claim 1, characterized in that between step (a) and step (b) pocket-shaped depressions are introduced into the pre-honed surface.
7. Verfahren nach Anspruch 6, dadurch gekennzeichnet, dass die taschenförmi- gen Vertiefungen mit einer maximalen Tiefe von ΙΟΌμηη in die Oberfläche eingebracht werden. 7. The method according to claim 6, characterized in that the pocket-shaped recesses with a maximum depth of ΙΟΌμηη are introduced into the surface.
8. Verfahren nach Anspruch 5, dadurch gekennzeichnet, dass die taschenförmi- gen Vertiefungen mit einem Durchmesser von 30 m bis 50 m in die Oberfläche eingebracht werden. 8. The method according to claim 5, characterized in that the pocket-shaped depressions are introduced with a diameter of 30 m to 50 m in the surface.
9. Verfahren nach Anspruch 5, dadurch gekennzeichnet, dass die taschenförmi- gen Vertiefungen mit einem Flächenanteil von 2% bis 10% in die Oberfläche eingebracht werden. 9. The method according to claim 5, characterized in that the pocket-shaped depressions are introduced into the surface with an area fraction of 2% to 10%.
10. Verfahren nach Anspruch 5, dadurch gekennzeichnet, dass die taschenförmi- gen Vertiefungen mit eines Laserstrahlverfahrens in die Oberfläche eingebracht werden. 10. The method according to claim 5, characterized in that the pocket-shaped depressions are introduced into the surface by means of a laser beam method.
11. Zylinderlaufbuchse aus einem Gusseisenwerkstoff für ein Zylinderkurbelgehäuse eines Verbrennungsmotors, herstellbar mittels eines Verfahrens nach einem der Ansprüche 1 bis 10. 11. Cylinder liner made of a cast iron material for a cylinder crankcase of an internal combustion engine, which can be produced by means of a method according to one of claims 1 to 10.
EP12755776.7A 2011-07-05 2012-07-04 Method for producing a cylinder liner surface and cylinder liner Not-in-force EP2729596B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011106564A DE102011106564A1 (en) 2011-07-05 2011-07-05 Method for producing a cylinder surface and cylinder liner
PCT/DE2012/000668 WO2013004213A1 (en) 2011-07-05 2012-07-04 Method for producing a cylinder liner surface and cylinder liner

Publications (2)

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EP2729596A1 true EP2729596A1 (en) 2014-05-14
EP2729596B1 EP2729596B1 (en) 2015-09-09

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EP (1) EP2729596B1 (en)
JP (1) JP6092202B2 (en)
CN (1) CN103649371B (en)
BR (1) BR112014000145A2 (en)
DE (1) DE102011106564A1 (en)
WO (1) WO2013004213A1 (en)

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DE102011106564A1 (en) 2013-01-10
US9488126B2 (en) 2016-11-08
BR112014000145A2 (en) 2017-02-07
JP6092202B2 (en) 2017-03-08
JP2014527135A (en) 2014-10-09
CN103649371B (en) 2016-11-23
CN103649371A (en) 2014-03-19
US20140144404A1 (en) 2014-05-29
EP2729596B1 (en) 2015-09-09
WO2013004213A1 (en) 2013-01-10

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