EP1119651B1 - Method of producing a wearing coat for cylinder barrels - Google Patents
Method of producing a wearing coat for cylinder barrels Download PDFInfo
- Publication number
- EP1119651B1 EP1119651B1 EP99969454A EP99969454A EP1119651B1 EP 1119651 B1 EP1119651 B1 EP 1119651B1 EP 99969454 A EP99969454 A EP 99969454A EP 99969454 A EP99969454 A EP 99969454A EP 1119651 B1 EP1119651 B1 EP 1119651B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cylinder
- wearing coat
- base material
- cylinder chamber
- metal alloy
- 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
- 238000000034 method Methods 0.000 title claims description 19
- 239000000463 material Substances 0.000 claims description 17
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- 229910001092 metal group alloy Inorganic materials 0.000 claims description 7
- 238000009792 diffusion process Methods 0.000 claims description 5
- 238000002485 combustion reaction Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 238000010285 flame spraying Methods 0.000 claims description 3
- 230000035515 penetration Effects 0.000 claims description 3
- 238000007750 plasma spraying Methods 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 229910000838 Al alloy Inorganic materials 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims 1
- 229910052790 beryllium Inorganic materials 0.000 claims 1
- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium atom Chemical compound [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 claims 1
- 229910052796 boron Inorganic materials 0.000 claims 1
- 229910052742 iron Inorganic materials 0.000 claims 1
- 229910052744 lithium Inorganic materials 0.000 claims 1
- 239000000155 melt Substances 0.000 claims 1
- 238000002844 melting Methods 0.000 claims 1
- 230000008018 melting Effects 0.000 claims 1
- 230000005672 electromagnetic field Effects 0.000 description 4
- 230000001965 increasing effect Effects 0.000 description 4
- 229910001234 light alloy Inorganic materials 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 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
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/02—Surface coverings of combustion-gas-swept parts
-
- 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
- C23C26/00—Coating not provided for in groups C23C2/00 - C23C24/00
- C23C26/02—Coating not provided for in groups C23C2/00 - C23C24/00 applying molten material to the substrate
-
- 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
- C23C4/18—After-treatment
-
- 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
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/08—Safety, indicating, or supervising devices
Definitions
- the invention relates to a method for producing a Wear layer in the cylinder raceways of light metal cylinders for internal combustion engines, one of which Metal alloy with a wear layer Layer thickness between 10 and 600 microns on the inside of the Cylinder barrel forming cylinder space is applied
- the present invention is based on the object Specify the procedure of the type mentioned, in which the Connection of a wear layer to the light metal alloy of the cylinder is improved, the wear layer in their properties themselves are not changed.
- This object is achieved according to the invention in a method of the type mentioned in that an electromagnetic alternating field with a frequency between 10 kHz and 5 MHz is radiated onto the wear layer from within the cylinder space for a duration of 1 to 30 seconds and thereby an interface area at the transition Partly melted from the base material of the cylinder to the wear layer with a liquid content of less than 50% and that this creates interfacial diffusion processes.
- the interface area is heated for a very short time above the solidus temperature of the base material, but only partially melted so that the liquid content is below 50%, since otherwise the dimensional accuracy would be feared.
- the conductivity of light alloy cylinder alloys aluminum alloys in particular are usually like this great that the penetration depth of the electromagnetic waves is very small and is only about 1 to 10 microns.
- Within this interface area becomes eddy currents generated, which in turn penetration of the field after the Lenz's rule seek to prevent so the field strength of the penetrating alternating electromagnetic field increasing depth decreases exponentially.
- Through the eddy currents can be a very strong local, essentially on the Limited heating of the light metal alloy be reached through their solidus point.
- the Interface area in the transition between base material and Wear layer is partially melted with a Liquid content of less than 50%. By doing Transitional areas will then find interface diffusion processes due to the increased mobility with increasing temperature of the alloy components.
- the ones described above Processes take place within a very short period, from 1 to 30 Seconds of limited time. They lead to one continuous metallurgical connection of the wear layer to the light alloy of the cylinder.
- the figure shows an overall reference number 2 designated device that as self-employed is considered fundamental to the invention, for generating and Irradiation of an alternating electromagnetic field in a Wear layer or an underlying one Light alloy of a cylinder raceway Cylinder blocks of an internal combustion engine.
- the Device 2 is in the longitudinal direction of the cylinder, ie in the direction of arrow 4, inserted into a cylinder bore.
- the Device comprises a carrier body 6 consisting of a Outer tube 8 and an inner tube 10, the outer tube 8 has a flange-shaped section 11 with which the Device 2 on the head side on the not shown Cylinder block can be placed.
- the outer tube 8 and that Inner tube 10 also provide the electrical coax feed an induction coil 12 in the form of a waveguide 14 with rectangular cross section, which is helical around the Longitudinal axis is provided around.
- a field concentrating means 16 in the form of ferrite cores for high-frequency alternating fields or in shape of sheet metal packages made of nickel alloy for alternating fields up to 50 kHz provided through which the occurrence of eddy currents largely avoided within the induction device shall be.
- the helical waveguide 14 forms at the same time a conduit 18 for a coolant, which in the shown case fed through the inner tube 10 and in Area fed from the lower end into the waveguide 14 becomes.
- the cooling medium flows through the helical Waveguide 14 and leaves the arrangement in the upper area between the inner tube 10 and the outer tube 8 in axial Direction.
- FIG. 2 shows a schematic representation of another preferred arrangement of a device 20 for generating and Irradiation of an alternating electromagnetic field.
- This Arrangement is compared to that described above in advantageously with only a single internally cooled Turn 22 formed, d. H. the coil is in axial Direction as short as possible.
- the winding 22 has in the area its radially outer surface 24 to be treated a pointed geometry. To this A way can be within the surface of the cylinder race circumferential, but extreme in the axial direction short, locally limited heating zone can be achieved.
- This device 20 is then relative in the axial direction 24 moved to the cylinder bore. It has been shown that with this tapered geometry radially the base material outside of the solidus temperature according to the invention increasing interface area kept colder can be. This proves to be advantageous as a result of the Treatment generated warpage of the component to be manufactured in occur to a lesser extent.
- Coil can be used with a field concentrator, it allows a very short in the axial direction 24 To generate heat input distance. In any case, one such arrangement relative to the coated and treating cylinder race moves.
- the Arrangement 2 or 20 in the longitudinal direction 4 in a cylinder bore an internal combustion engine introduced.
- the arrangement 2 remains stationary, while the arrangement 20 opposite the Cylinder track is moved in the axial direction. It will short-term currents of several thousand amperes in the area between 10 kHz and 5 MHz for a period of 1 to 30 Seconds via the coaxial feed into or through the Waveguide 14 generated 1 to 30 seconds.
- This alternating electromagnetic field penetrates the surface a wear layer of a cylinder race and that Base material of the cylinder race and warms you up Interface area in the heterogeneous area one of the Materials (above solidus temperature). This will cause agitation of the interface diffusion processes that arise intimate metallic connection between the metal of the Base material of the cylinder block and the wear layer generated.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Physics & Mathematics (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Coating By Spraying Or Casting (AREA)
Description
Die Erfindung betrifft ein Verfahren zum Herstellen einer Verschleißschicht bei Zylinderlaufbahnen von Leichtmetall-Zylindern für Verbrennungskraftmaschinen, wobei eine die Verschleißschicht bildende Metalllegierung mit einer Schichtdicke zwischen 10 und 600 µm auf die Innenseite des die Zylinderlaufbahn bildenden Zylinderraums aufgebracht wirdThe invention relates to a method for producing a Wear layer in the cylinder raceways of light metal cylinders for internal combustion engines, one of which Metal alloy with a wear layer Layer thickness between 10 and 600 microns on the inside of the Cylinder barrel forming cylinder space is applied
Es war seither üblich, die Verschleißschicht in Form einer mit dem Leichtmetall des Zylinders umgießbaren Zylinderlaufbuchse aufzubringen. Die Anbindung der Laufbuchse an den Umguss des Zylinders ist jedoch problematisch und bildet stets eine Schwachstelle für diese Technologie. It has been common since then to use the wear layer in the form of a the cylinder liner cast around the light metal of the cylinder applied. The connection of the liner to the casting around the However, cylinder is problematic and always forms one Vulnerability for this technology.
Auch das Aufbringen von Verschleißschichten durch Plasma- oder Flammspritzen führten zu keiner vollständigen metallurgischen Bindung zwischen der Verschleißschicht und der Leichtmetalllegierung des Zylinders. Es besteht daher die Gefahr, dass sich die Verschleißschicht mechanisch ablöst. Auch das Problem der sog. Spaltkorrosion ist nach wie vor nicht zufriedenstellend gelöst.The application of wear layers by plasma or Flame spraying did not lead to a complete metallurgical Bond between the wear layer and the Light alloy of the cylinder. There is therefore the Danger of the wear layer becoming detached mechanically. The problem of so-called crevice corrosion is also still there not solved satisfactorily.
Die DE 197 02 893 A1 beschreibt ein Verfahren zur Randschichtbehandlung von Aluminiumwerkstoffen, wonach Metalle oder metallische Verbindungen aufgebracht und induktiv auf Temperaturen unterhalb der Solidustemperatur des Grundwerkstoffes erwärmt und längere Zeit gehalten werden. Diese Stoffe sollen dann in den Grundwerkstoff diffundieren und dort mit dem Grundmaterial verschleißmindernde harte Verbindungen erst ausbilden.DE 197 02 893 A1 describes a method for Surface treatment of aluminum materials, after which metals or metallic connections applied and inductively Temperatures below the solidus temperature of the Base material heated and held for a long time. These substances should then diffuse into the base material and there with the base material wear-reducing hard Form connections first.
Der vorliegenden Erfindung liegt die Aufgabe zu Grunde, ein Verfahren der eingangs genannten Art anzugeben, bei dem die Anbindung einer Verschleißschicht an die Leichtmetalllegierung des Zylinders verbessert wird, wobei die Verschleißschicht in ihren Eigenschaften selbst nicht verändert wird.The present invention is based on the object Specify the procedure of the type mentioned, in which the Connection of a wear layer to the light metal alloy of the cylinder is improved, the wear layer in their properties themselves are not changed.
Diese Aufgabe wird bei einem Verfahren der genannten Art
erfindungsgemäß dadurch gelöst, dass von innerhalb des
Zylinderraums ein elektromagnetisches Wechselfeld mit einer
Frequenz zwischen 10 kHz und 5 MHz für eine Dauer von 1 bis 30
Sekunden auf die Verschleißschicht eingestrahlt wird und dass
dadurch ein Grenzflächenbereich am Übergang vom Grundmaterial
des Zylinders zur Verschleißschicht teilerschmolzen wird mit
einem Flüssiganteil von weniger als 50 % und dass dadurch
Grenzflächendiffusionsprozesse erzeugt werden.
Der Grenzflächenbereich wird sehr kurzzeitig über die
Solidustemperatur des Grundmaterials erhitzt, jedoch dabei nur
teilerschmolzen so dass der Flüssiganteil unter 50 % liegt, da
andernfalls eine Beeinträchtigung der Maßhaltigkeit zu
befürchten wäre.This object is achieved according to the invention in a method of the type mentioned in that an electromagnetic alternating field with a frequency between 10 kHz and 5 MHz is radiated onto the wear layer from within the cylinder space for a duration of 1 to 30 seconds and thereby an interface area at the transition Partly melted from the base material of the cylinder to the wear layer with a liquid content of less than 50% and that this creates interfacial diffusion processes.
The interface area is heated for a very short time above the solidus temperature of the base material, but only partially melted so that the liquid content is below 50%, since otherwise the dimensional accuracy would be feared.
Die Leitfähigkeit von Leichtmetallzylinderlegierungen, insbesondere von Aluminiumlegierungen ist üblicherweise so groß, dass die Eindringtiefe der elektromagnetischen Wellen sehr gering ist und nur etwa 1 bis 10 µm beträgt. Innerhalb dieses Grenzflächenbereichs werden elektrische Wirbelströme erzeugt, welche ihrerseits ein Eindringen des Felds nach der Lenzschen Regel zu verhindern suchen, so dass die Feldstärke des eindringenden elektromagnetischen Wechselfelds mit zunehmender Tiefe exponentiell abnimmt. Durch die Wirbelströme kann eine sehr starke lokale, im wesentlichen auf die Eindringtiefe begrenzte Erhitzung der Leichtmetalllegierung über ihren Soliduspunkt erreicht werden. Der Grenzflächenbereich im Übergang zwischen Grundmaterial und Verschleißschicht wird teilerschmolzen mit einem Flüssigkeitsanteil von weniger als 50 %. In dem Übergangsbereich finden dann Grenzflächendiffusionsprozesse auf Grund der mit steigender Temperatur erhöhten Beweglichkeit der Legierungsbestandteile auf. Die vorstehend beschriebenen Prozesse finden innerhalb eines sehr kurzen, auf 1 bis 30 Sekunden begrenzten Zeitraums statt. Sie führen zu einer durchgehenden metallurgischen Anbindung der Verschleißschicht an die Leichtmetalllegierung des Zylinders.The conductivity of light alloy cylinder alloys aluminum alloys in particular are usually like this great that the penetration depth of the electromagnetic waves is very small and is only about 1 to 10 microns. Within this interface area becomes eddy currents generated, which in turn penetration of the field after the Lenz's rule seek to prevent so the field strength of the penetrating alternating electromagnetic field increasing depth decreases exponentially. Through the eddy currents can be a very strong local, essentially on the Limited heating of the light metal alloy be reached through their solidus point. The Interface area in the transition between base material and Wear layer is partially melted with a Liquid content of less than 50%. By doing Transitional areas will then find interface diffusion processes due to the increased mobility with increasing temperature of the alloy components. The ones described above Processes take place within a very short period, from 1 to 30 Seconds of limited time. They lead to one continuous metallurgical connection of the wear layer to the light alloy of the cylinder.
Es besteht die Möglichkeit, die Verschleißschicht durch Plasmaspritzen oder Flammspritzen auf die Innenseite des Zylinderraums aufzubringen und anschließend eine metallurgische Anbindung durch lokales induktives Erhitzen gemäß der Erfindung durchzuführen - es ist zumindest auch theoretisch denkbar, die Verschleißschicht durch Walzplattieren auf die Innenseite des Zylinderraums aufzubringen.There is a possibility to wear through Plasma spraying or flame spraying on the inside of the Apply cylinder space and then one metallurgical connection through local inductive heating to perform according to the invention - at least it is theoretically conceivable through the wear layer Roll cladding on the inside of the cylinder space applied.
Weiterhin wäre die Verwendung einer dünnwandigen Trägerbuchse,
auf welche die Verschleißteilschicht aufgebracht wird,
denkbar. Die Trägerbuchse wird wie eine konventionelle
Laufbuchse eingegossen. Hierbei verklammert sich die
Beschichtung mit dem Umguss. Bei der Bearbeitung des
Kurbelgehäuses wird das Material der Trägerbuchse zerspant und
somit die Verschleißschicht freigelegt.
Ferner könnte es sich als vorteilhaft erweisen, wenn die
Verschleißschicht zuvor auf eine Pinole des Gießwerkzeugs
buchsenförmig aufgespritzt würde. It would also be conceivable to use a thin-walled carrier bush to which the wear part layer is applied. The carrier bushing is cast in like a conventional bushing. The coating clings to the encapsulation. When machining the crankcase, the material of the carrier bush is machined and the wear layer is thus exposed.
Furthermore, it could prove to be advantageous if the wear layer was previously sprayed onto a sleeve of the casting tool in the form of a bush.
Weitere Einzelheiten, Merkmale und Vorteile der Erfindung ergeben sich aus den beigefügten Ansprüchen und der zeichnerischen Darstellung und nachfolgenden Beschreibung einer Vorrichtung zur Durchführung des erfindungsgemäßen Verfahrens. In der Zeichnung zeigt:
- Figur 1
- eine Längsschnittansicht einer Vorrichtung zur Ausführung des erfindungsgemäßen Verfahrens; und
- Figur 2
- eine Längsschnittansicht einer weiteren Vorrichtung zur Ausführung des erfindungsgemäßen Verfahrens in schematischer Darstellung.
- Figure 1
- a longitudinal sectional view of an apparatus for performing the method according to the invention; and
- Figure 2
- a longitudinal sectional view of another device for performing the method according to the invention in a schematic representation.
Die Figur zeigt eine insgesamt mit dem Bezugszeichen 2
bezeichnete Vorrichtung, die als selbstständig
erfindungsbegründend angesehen wird, zum Erzeugen und
Einstrahlen eines elektromagnetischen Wechselfelds in eine
Verschleißschicht bzw. eine darunterliegende
Leichtmetalllegierung einer Zylinderlaufbahn eines
Zylinderblocks einer Verbrennungskraftmaschine. Die
Vorrichtung 2 wird in Zylinderlängsrichtung, also in Richtung
des Pfeils 4, in eine Zylinderbohrung eingeführt. Die
Vorrichtung umfasst einen Trägerkörper 6 bestehend aus einem
Außenrohr 8 und einem Innenrohr 10, wobei das Außenrohr 8
einen flanschförmigen Abschnitt 11 aufweist, mit dem die
Vorrichtung 2 kopfseitig auf dem nicht dargestellten
Zylinderblock auflegbar ist. Das Außenrohr 8 bzw. das
Innenrohr 10 stellen zugleich die elektrische Koaxzuführung zu
einer Induktionsspule 12 in Form eines Hohlleiters 14 mit
rechteckigem Querschnitt dar, der schraubenförmig um die
Längsachse herum vorgesehen ist. Zwischen den Windungen des
Hohlleiters 14 ist ein feldkonzentrierendes Mittel 16 in Form
von Ferrit-Kernen für hochfrequente Wechselfelder bzw. in Form
von Blechpaketen aus Nickellegierung für Wechselfelder bis 50
kHz vorgesehen, durch welche das Auftreten von Wirbelströmen
innerhalb der Induktionsvorrichtung weitestgehend vermieden
werden soll. Der schraubenförmige Hohlleiter 14 bildet
zugleich ein Leitungsmittel 18 für ein Kühlmittel, welches im
dargestellten Fall durch das Innenrohr 10 zugeführt und im
Bereich von dessen unterem Ende in den Hohlleiter 14 gespeist
wird. Das Kühlmedium durchfließt den schraubenförmigen
Hohlleiter 14 und verlässt die Anordnung im oberen Bereich
zwischen dem Innenrohr 10 und dem Außenrohr 8 in axialer
Richtung.The figure shows an overall reference number 2
designated device that as self-employed
is considered fundamental to the invention, for generating and
Irradiation of an alternating electromagnetic field in a
Wear layer or an underlying one
Light alloy of a cylinder raceway
Cylinder blocks of an internal combustion engine. The
Device 2 is in the longitudinal direction of the cylinder, ie in the direction
of arrow 4, inserted into a cylinder bore. The
Device comprises a
Figur 2 zeigt in schematischer Darstellung eine weitere
bevorzugte Anordnung einer Vorrichtung 20 zum Erzeugen und
Einstrahlen eines elektromagnetischen Wechselfelds. Diese
Anordnung ist gegenüber der vorstehend beschriebenen in
vorteilhafter Weise mit nur einer einzigen innengekühlten
Windung 22 ausgebildet, d. h. die Spule ist in axialer
Richtung so kurz wie möglich. Die Windung 22 hat im Bereich
ihrer radial äußeren der zu behandelnden Oberfläche 24
zugewandten Seite eine spitz auslaufende Geometrie. Auf diese
Weise kann innerhalb der Oberfläche der Zylinderlaufbahn eine
in Umfangsrichtung umlaufende, in axialer Richtung aber extrem
kurze, also lokal stark begrenzte Aufheizzone erreicht werden.
Diese Vorrichtung 20 wird dann in axialer Richtung 24 relativ
zu der Zylinderbohrung bewegt. Es hat sich gezeigt, daß mit
dieser spitz auslaufenden Geometrie das Grundmaterial radial
außerhalb des erfindungsgemäß über die Solidus-Temperatur zu
erhöhenden Grenzflächenbereichs leichter kälter gehalten
werden kann. Dies erweist sich als vorteilhaft, da infolge der
Behandlung erzeugte Verzüge des herzustellenden Bauteils in
geringerem Maße auftreten.Figure 2 shows a schematic representation of another
preferred arrangement of a
Anstelle einer einwindigen Spule kann auch eine mehrwindige
Spule mit einem Feldkonzentrator verwendet werden, der es
ermöglicht, eine in axialer Richtung 24 sehr kurze
Wärmeeintragsstrecke zu erzeugen. In jedem Fall wird eine
derartige Anordnung relativ zur beschichteten und zu
behandelnden Zylinderlaufbahn bewegt.Instead of a single-bobbin, a multi-bobbin can also be used
Coil can be used with a field concentrator, it
allows a very short in the
Zur Durchführung des erfindungsgemäßen Verfahrens wird die
Anordnung 2 bzw. 20 in Längsrichtung 4 in eine Zylinderbohrung
einer Verbrennungskraftmaschine eingeführt. Die Anordnung 2
verbleibt stationär, während die Anordnung 20 gegenüber der
Zylinderlaufbahn in axialer Richtung bewegt wird. Es werden
kurzzeitig Ströme von mehreren Tausend Ampere im Bereich
zwischen 10 kHz und 5 MHz für eine Zeitdauer von 1 bis 30
Sekunden über die koaxiale Zuführung in bzw. durch die
Hohlleiter 14 1 bis 30 Sekunden erzeugt.To carry out the method according to the invention, the
Dieses elektromagnetische Wechselfeld dringt in die Oberfläche einer Verschleißschicht einer Zylinderlaufbahn und das Grundmaterial der Zylinderlaufbahn ein und erwärmt einen Grenzflächenbereich ins heterogene Gebiet einer der Materialien (über Solidustemperatur). Hierdurch wird auf Grund der sich einstellenden Grenzflächendiffusionsprozesse eine innige metallische Anbindung zwischen dem Metall des Grundmaterials des Zylinderblocks und der Verschleißschicht erzeugt.This alternating electromagnetic field penetrates the surface a wear layer of a cylinder race and that Base material of the cylinder race and warms you up Interface area in the heterogeneous area one of the Materials (above solidus temperature). This will cause agitation of the interface diffusion processes that arise intimate metallic connection between the metal of the Base material of the cylinder block and the wear layer generated.
Claims (11)
- Method for producing a wearing coat in cylinder barrels of light metal cylinders for internal-combustion engines, a metal alloy forming the wearing coat with a layer thickness between 10 and 600 µm being applied to the inside of the cylinder chamber forming the cylinder barrel, characterised in that an electromagnetic alternating field with a frequency of 10 kHz and 5 MHz is radiated onto the wearing coat from inside the cylinder chamber for a duration of 1 to 30 seconds, and in that an interfacial region at the transition from base material of the cylinder to wearing coat is consequently partially melted with a liquid content of less than 50%, and in that interfacial diffusion processes are generated as a result.
- Method according to claim 1, characterised in that the light metal cylinder is cast from aluminium alloy and a temperature within the interfacial range of 500 to 600°C is generated owing to the radiated alternating field.
- Method according to claim 1 or 2, characterised in that an interfacial region with a width of 3 to 15 µm is brought to melting temperature.
- Method according to claim 1, 2 or 3, characterised in that the metal alloy is applied to the inside of the cylinder chamber by plasma spraying or flame spraying.
- Method according to claim 1, 2 or 3, characterised in that the metal alloy is applied to the inside of the cylinder chamber by roll bonding.
- Method according to claim 1, 2 or 3, characterised in that the metal alloy is applied to the inside of the cylinder chamber in the form of a liner cast-in from the melt of the cylinder.
- Method according to any of the preceding claims, characterised in that the frequency of the electromagnetic alternating field is selected such that the penetration depth is 15 to 650 µm.
- Method according to any of the preceding claims, characterised in that, for example, an iron master alloy is applied as wearing coat.
- Method according to any of the preceding claims, characterised in that the wearing coat comprises materials with a high diffusion rate in the base material, in particular lithium, beryllium, boron.
- Method according to any of the preceding claims, characterised in that the base material is cooled.
- Method according to claim 10, characterised in that the base material is cooled from the side remote from the wearing coat.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19842608A DE19842608A1 (en) | 1998-09-17 | 1998-09-17 | Production of a wear layer on the tracks of light metal cylinders for I.C. engines comprises radiating an electromagnetic field onto the wear layer and partially melting in a boundary surface layer |
| DE19842608 | 1998-09-17 | ||
| PCT/EP1999/006890 WO2000017415A1 (en) | 1998-09-17 | 1999-09-17 | Method of producing a wearing coat for cylinder barrels |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1119651A1 EP1119651A1 (en) | 2001-08-01 |
| EP1119651B1 true EP1119651B1 (en) | 2002-07-10 |
Family
ID=7881285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99969454A Expired - Lifetime EP1119651B1 (en) | 1998-09-17 | 1999-09-17 | Method of producing a wearing coat for cylinder barrels |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1119651B1 (en) |
| DE (2) | DE19842608A1 (en) |
| WO (1) | WO2000017415A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006006849A1 (en) * | 2006-02-15 | 2007-08-16 | Bayerische Motoren Werke Ag | Method for age hardening highly alloyed non-ferrous metals e.g. crankcase comprises carrying out inductive solution annealing with subsequent quenching |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE529694C (en) * | 1931-07-16 | Siemens Schuckertwerke Akt Ges | Method of heating metal rings | |
| DE973525C (en) * | 1951-11-01 | 1960-03-17 | Deutsche Edelstahlwerke Ag | Method for armoring valve cones |
| GB837299A (en) * | 1955-09-22 | 1960-06-09 | United States Steel Corp | Method of coating the interior of metal cylinders |
| US3280758A (en) * | 1964-09-24 | 1966-10-25 | Sundstrand Corp | Cylinder block of a hydraulic unit and method of making same |
| DE1777228A1 (en) * | 1968-09-28 | 1971-05-27 | Schmidt Gmbh Karl | Method for joining different piston materials |
| DE2200003B2 (en) * | 1972-01-03 | 1977-09-15 | Karl Schmidt Gmbh, 7107 Neckarsulm | PROCESS FOR SURFACE FINISHING OF LIGHT ALLOY PISTONS |
| DE2362026A1 (en) * | 1973-12-13 | 1975-06-26 | Aluminium Werke Ag | Surface hardening of aluminium (alloys) - by applying a metal coating followed by a fusion treatment |
| DE2501370C3 (en) * | 1975-01-15 | 1978-05-03 | Goetzewerke Friedrich Goetze Ag, 5093 Burscheid | Process for the production of cast iron machine parts with surfaces subject to friction and high wear resistance |
| US4234776A (en) * | 1978-07-12 | 1980-11-18 | Thermatool Corp. | Method of producing areas of alloy metal on a metal part using electric currents |
| US4490411A (en) * | 1983-03-14 | 1984-12-25 | Darryl Feder | Apparatus for and method of metalizing internal surfaces of metal bodies such as tubes and pipes |
| KR960041395A (en) * | 1995-05-31 | 1996-12-19 | 유상부 | Iron base alloy with excellent corrosion resistance and abrasion resistance, and a method for producing a corrosion resistant wear member using the same |
| DE19702893A1 (en) * | 1997-01-20 | 1998-07-23 | Johann Prof Dr Ing Grosch | Inductive surface alloying of aluminium component |
-
1998
- 1998-09-17 DE DE19842608A patent/DE19842608A1/en not_active Withdrawn
-
1999
- 1999-09-17 DE DE59902003T patent/DE59902003D1/en not_active Expired - Lifetime
- 1999-09-17 WO PCT/EP1999/006890 patent/WO2000017415A1/en active IP Right Grant
- 1999-09-17 EP EP99969454A patent/EP1119651B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP1119651A1 (en) | 2001-08-01 |
| DE59902003D1 (en) | 2002-08-14 |
| DE19842608A1 (en) | 2000-03-23 |
| WO2000017415A1 (en) | 2000-03-30 |
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