EP2401532B1 - Piston ring - Google Patents

Piston ring Download PDF

Info

Publication number
EP2401532B1
EP2401532B1 EP09744325.3A EP09744325A EP2401532B1 EP 2401532 B1 EP2401532 B1 EP 2401532B1 EP 09744325 A EP09744325 A EP 09744325A EP 2401532 B1 EP2401532 B1 EP 2401532B1
Authority
EP
European Patent Office
Prior art keywords
weight
piston ring
max
steel material
steel
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.)
Not-in-force
Application number
EP09744325.3A
Other languages
German (de)
French (fr)
Other versions
EP2401532A1 (en
Inventor
Laszlo Pelsoeczy
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.)
Federal Mogul Burscheid GmbH
Original Assignee
Federal Mogul Burscheid GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Federal Mogul Burscheid GmbH filed Critical Federal Mogul Burscheid GmbH
Publication of EP2401532A1 publication Critical patent/EP2401532A1/en
Application granted granted Critical
Publication of EP2401532B1 publication Critical patent/EP2401532B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/34—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium

Definitions

  • the present invention relates to a piston ring. Moreover, the present invention relates to a method for producing the piston rings according to the invention.
  • piston rings seal the gap between the piston head and the cylinder wall with respect to the combustion chamber.
  • piston piston ring slides on the one hand with its outer peripheral surface in constant resilient engagement against the cylinder wall, on the other hand slides the piston ring, due to the tilting movements of the piston, oscillating in its Kolbenringnut, with its edges alternately at the top or bottom Abut groove flank of the piston ring groove.
  • sliding against each other occurs depending on the material, a more or less severe wear, which can lead to so-called scuffing, scoring and finally to a destruction of the engine in a dry run.
  • Piston rings For the production of highly stressed parts of internal combustion engines, such as piston rings, usually cast iron materials or cast iron alloys are used. Piston rings, particularly compression rings, are subject to increasing loads in highly stressed engines, including compression peak pressure, combustion temperature, EGR, and lubricating film reduction, which significantly affect their performance characteristics, such as wear, fire resistance, microwelding, and corrosion resistance.
  • cast iron materials according to the prior art have a high risk of breakage, so that it often comes to ring breaking when using existing materials. Increased mechanical-dynamic loads lead to shorter lifetimes of piston rings or cylinder liners. Likewise, it comes to heavy wear and corrosion on the tread and flank.
  • piston rings made of high-quality steel tempered and high-alloyed, such as material 1.4112.
  • high-quality steel tempered and high-alloyed, such as material 1.4112.
  • ferrous materials with less than 2.08 wt .-% carbon as steel If the carbon content is higher, this is referred to as cast iron.
  • Steel materials have better strength and toughness properties compared with cast iron, since there is no disturbance due to free graphite in the basic structure.
  • Cast iron has a much lower melting temperature than steel. The difference can be up to 350 ° C, depending on the chemical composition. Cast iron is therefore easier to melt and cast, since a lower melting temperature means a lower casting temperature and thus a smaller shrinkage due to shrinkage, whereby the cast material has fewer voids or hot and cold cracks. A lower casting temperature also leads to a lower load on the molding material (Erosion, gas porosity, sand inclusions) and the furnace as well as lower melt costs.
  • the melting temperature of the iron material depends not only on its carbon content, but also on the "degree of saturation".
  • S c C / 4 . 26 - 1 / 3 Si + P ,
  • a saturation level of 1.0 is usually desired, wherein the cast iron has a melting temperature of 1150 ° C.
  • the degree of saturation of steel is about 0.18, depending on the chemical composition.
  • Eutectic steel has a melting temperature of 1500 ° C.
  • the degree of saturation can be significantly influenced by the Si or P content. For example, a 3% by weight higher content of silicon will be similar to a 1% higher C content. It is thus possible to produce a steel material with a C content of 1% by weight and 9.78% by weight of silicon, which has the same melting temperature as cast iron with a degree of saturation of 1.0 (C: 3.26% by weight). -%, Si: 3.0 wt .-%).
  • Piston rings of high silicon steel cast material are known in the art.
  • the silicon present in higher amounts adversely affects the hardenability of the material as its austenite transformation temperature "Ac3" is increased.
  • austenite transformation temperature "Ac3" is increased.
  • Kolberninge which have as a basic body a steel material composition containing the following elements in the specified proportion: C: 0.5 - 1.2 Wt .-% Nb: 0,0 - 7,0 Wt .-% Cr: 0.2-20.0 Wt .-% Si: 2,0 - 10,0 Wt .-% Fe: 49.0 - 97.1 Wt .-% Ti: 0,0 - 7,0 Wt .-% Mn: 0.1 - 3.0 Wt .-% V: 0,0 - 7,0 Wt .-% Not a word: 0.1 - 3.0 Wt .-% W: 0,0 - 0,5 Wt .-% B: Max.
  • the increased wear resistance is achieved according to the invention by the carbide formers niobium, titanium, vanadium and tungsten. According to the invention, it has been found that a proportion of 2.0-7.0% by weight of these carbide formers leads to good wear resistance without the machinability of the resulting material deteriorating such that the production costs would thereby increase disproportionately.
  • Table 1 gives a list of the hardness of carbides of the elements niobium, titanium, vanadium and tungsten: ⁇ b> Table 1 ⁇ / b> carbide NbC TiC VC WC W 2 C Hardness HV (50 kg) 2000 3000 2900 2200 3000
  • the piston rings according to the invention have a reduced tendency to change their shape under high heat and thus have a permanently high performance and also reduce the oil consumption.
  • the steel piston rings according to the invention furthermore have the advantage that their production with the machines and technologies necessary for the production of cast iron workpieces is made possible.
  • the production costs are equivalent to those of cast iron piston rings, which offers the manufacturer a cost advantage and a better added value.
  • material parameters can be set freely by the supplier.
  • starting materials for example, steel scrap, circulation material and alloying materials can be used.
  • the melting process takes place in an oven, preferably a cupola. Subsequently, a blank is produced with solidification of the melt.
  • the piston ring can be cast with methods known in the art, such as centrifugal casting, continuous casting, stamp pressing process, croning or preferably green sand molds.
  • the mold After cooling the piston ring, the mold is ejected and the blank obtained cleaned.
  • the quenching medium used is preferably oil.
  • nitriding of the resulting piston ring can take place after the aforementioned method steps. This can be done for example by gas nitriding, plasma nitriding or pressure nitriding.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Description

Die vorliegende Erfindung betrifft einen Kolbenring. Außerdem betrifft die vorliegende Erfindung ein Verfahren zur Herstellung der erfindungsgemäßen Kolbenringe.The present invention relates to a piston ring. Moreover, the present invention relates to a method for producing the piston rings according to the invention.

Stand der TechnikState of the art

Kolbenringe dichten in einem Verbrennungskraftmotor den zwischen Kolbenkopf und Zylinderwand vorhandenen Spalt gegenüber dem Brennraum ab. Bei der Auf- und Abbewegung des Kolbens gleitet der Kolbenring einerseits mit seiner äußeren Umfangsfläche in ständiger federnder Anlage gegen die Zylinderwand, andererseits gleitet der Kolbenring, bedingt durch die Kippbewegungen des Kolbens, oszillierend in seiner Kolbenringnut, wobei seine Flanken wechselnd an der oberen oder unteren Nutenflanke der Kolbenringnut anliegen. Bei den jeweils gegeneinander laufenden Gleitpartnern tritt in Abhängigkeit des Materials ein mehr oder weniger starker Verschleiß auf, der bei einem Trockenlauf zu so genannten Fressern, Riefenbildung und schließlich zu einer Zerstörung des Motors führen kann. Um das Gleit- und Verschleißverhalten von Kolbenringen gegenüber der Zylinderwand zu verbessern, wurden diese an deren Umfangsfläche mit Beschichtungen aus unterschiedlichen Materialien versehen.In an internal combustion engine, piston rings seal the gap between the piston head and the cylinder wall with respect to the combustion chamber. In the up and down movement of the piston piston ring slides on the one hand with its outer peripheral surface in constant resilient engagement against the cylinder wall, on the other hand slides the piston ring, due to the tilting movements of the piston, oscillating in its Kolbenringnut, with its edges alternately at the top or bottom Abut groove flank of the piston ring groove. In each case sliding against each other occurs depending on the material, a more or less severe wear, which can lead to so-called scuffing, scoring and finally to a destruction of the engine in a dry run. In order to improve the sliding and wear behavior of piston rings against the cylinder wall, they were provided on the peripheral surface with coatings of different materials.

Zur Herstellung hoch beanspruchter Teile von Verbrennungskraftmotoren, wie beispielsweise Kolbenringen, werden meist Gusseisenwerkstoffe bzw. Gusseisenlegierungen verwendet. Kolbenringe, insbesondere Kompressionsringe, unterliegen in hochbeanspruchten Motoren einer zunehmenden Belastung, unter anderem Kompressionsspitzendruck, Verbrennungstemperatur, EGR und Schmierfilmreduzierung, die deren Funktionseigenschaften, wie Verschleiß, Brandspurbeständigkeit, Microwelding und Korrosionsbeständigkeit, maßgeblich beeinflussen.For the production of highly stressed parts of internal combustion engines, such as piston rings, usually cast iron materials or cast iron alloys are used. Piston rings, particularly compression rings, are subject to increasing loads in highly stressed engines, including compression peak pressure, combustion temperature, EGR, and lubricating film reduction, which significantly affect their performance characteristics, such as wear, fire resistance, microwelding, and corrosion resistance.

Gusseisenwerkstoffe gemäß dem Stand der Technik weisen jedoch ein hohes Bruchrisiko auf, so dass es bei der Verwendung bisheriger Werkstoffe häufig zu Ringbrüchen kommt. Gestiegene mechanisch-dynamische Belastungen führen zu kürzeren Lebensdauern von Kolbenringen oder Zylinderlaufbuchsen. Ebenso kommt es zu starkem Verschleiß und Korrosion an Lauffläche und Flanke.However, cast iron materials according to the prior art have a high risk of breakage, so that it often comes to ring breaking when using existing materials. Increased mechanical-dynamic loads lead to shorter lifetimes of piston rings or cylinder liners. Likewise, it comes to heavy wear and corrosion on the tread and flank.

Aufgrund der höheren mechanischen und dynamischen Beanspruchungen von Kolbenringen fordern immer mehr Motorenhersteller Kolbenringe aus hochwertigem Stahl (vergütet und hochlegiert, wie beispielsweise Werkstoff 1.4112). Hierbei bezeichnet man Eisenwerkstoffe mit weniger als 2,08 Gew.-% Kohlenstoff als Stahl. Liegt der Kohlenstoffgehalt höher, so redet man von Gusseisen. Stahlwerkstoffe besitzen gegenüber Gusseisen bessere Festigkeits- und Zähigkeitseigenschaften, da keine Störung durch freien Graphit im Grundgefüge vorhanden ist.Due to the higher mechanical and dynamic loads of piston rings, more and more engine manufacturers are demanding piston rings made of high-quality steel (tempered and high-alloyed, such as material 1.4112). This refers to ferrous materials with less than 2.08 wt .-% carbon as steel. If the carbon content is higher, this is referred to as cast iron. Steel materials have better strength and toughness properties compared with cast iron, since there is no disturbance due to free graphite in the basic structure.

Meist werden hochchromlegierte martensitische Stähle für die Herstellung von Stahlkolbenringen eingesetzt. Stahlkolbenringe werden aus Profildraht hergestellt. Der Profildraht wird rund gewickelt, aufgeschnitten und über einen "Unrund"-Dorn gezogen. Auf diesem Dorn erhält der Kolbenring durch einen Glühprozess seine erwünschte unrunde Form, wodurch die geforderten Tangentialkräfte eingestellt werden. Ein weiterer Nachteil der Herstellung von Kolbenringen aus Stahl ist, dass ab einem gewissen Durchmesser die Ringherstellung (Wickeln) aus Stahldraht nicht mehr möglich. Kolbenringe aus Gusseisen werden dagegen bereits unrund gegossen, so dass sie von Anfang an eine ideale Form aufweisen.Mostly high-chromium-martensitic steels are used for the production of steel piston rings. Steel piston rings are made of profile wire. The profile wire is wound around, cut open and pulled over a "non-circular" mandrel. On this mandrel receives the piston ring by an annealing process its desired non-circular shape, whereby the required tangential forces are set. Another disadvantage of the production of piston rings made of steel is that from a certain diameter, the ring production (winding) made of steel wire is no longer possible. In contrast, cast iron piston rings are already cast out of round so that they have an ideal shape right from the start.

Gusseisen besitzt eine wesentlich niedrigere Schmelztemperatur als Stahl. Der Unterschied kann je nach chemischer Zusammensetzung bis zu 350°C betragen. Gusseisen ist daher einfacher zu schmelzen und zu gießen, da eine niedrigere Schmelztemperatur eine niedrigere Gießtemperatur und damit eine kleinere abkühlungsbedingte Schwindung bedeutet, wodurch der gegossene Werkstoff weniger Lunker bzw. Warm- und Kaltrisse aufweist. Eine niedrigere Gießtemperatur führt weiterhin zu einer geringeren Belastung des Formstoff (Erosion, Gasporositäten, Sandeinschlüsse) und des Ofens sowie zu geringeren Schmelzkosten.Cast iron has a much lower melting temperature than steel. The difference can be up to 350 ° C, depending on the chemical composition. Cast iron is therefore easier to melt and cast, since a lower melting temperature means a lower casting temperature and thus a smaller shrinkage due to shrinkage, whereby the cast material has fewer voids or hot and cold cracks. A lower casting temperature also leads to a lower load on the molding material (Erosion, gas porosity, sand inclusions) and the furnace as well as lower melt costs.

Die Schmelztemperatur des Eisenwerkstoffs hängt nicht nur von seinem Kohlenstoffgehalt, sondern auch von dem "Sättigungsgrad" ab. Es gilt die vereinfachte Formel: S c = C / 4 , 26 − 1 / 3 Si + P .

Figure imgb0001
The melting temperature of the iron material depends not only on its carbon content, but also on the "degree of saturation". The simplified formula applies: S c = C / 4 . 26 - 1 / 3 Si + P ,
Figure imgb0001

Je näher der Sättigungsgrad an 1 liegt, desto niedriger ist die Schmelztemperatur. Bei Gusseisen wird zumeist ein Sättigungsgrad von 1,0 angestrebt, wobei das Gusseisen eine Schmelztemperatur von 1150°C aufweist. Der Sättigungsgrad von Stahl beträgt, abhängig von der chemischen Zusammensetzung, ungefähr 0,18. Eutektischer Stahl weist eine Schmelztemperatur von 1500°C auf.The closer the saturation level is to 1, the lower the melting temperature. For cast iron, a saturation level of 1.0 is usually desired, wherein the cast iron has a melting temperature of 1150 ° C. The degree of saturation of steel is about 0.18, depending on the chemical composition. Eutectic steel has a melting temperature of 1500 ° C.

Der Sättigungsgrad kann durch den Si- oder P-Gehalt deutlich beeinflusst werden. Zum Beispiel wird sich ein um 3 Gew.-% höherer Gehalt an Silizium ähnlich wie ein 1 Gew.-% höherer C-Gehalt aus. Es ist somit möglich, einen Stahlwerkstoff mit einem C-Gehalt von 1 Gew.-% und 9,78 Gew.-% Silizium herzustellen, der die gleiche Schmelztemperatur wie Gusseisen mit einem Sättigungsgrad von 1,0 (C: 3,26 Gew.-%, Si: 3,0 Gew.-%) aufweist.The degree of saturation can be significantly influenced by the Si or P content. For example, a 3% by weight higher content of silicon will be similar to a 1% higher C content. It is thus possible to produce a steel material with a C content of 1% by weight and 9.78% by weight of silicon, which has the same melting temperature as cast iron with a degree of saturation of 1.0 (C: 3.26% by weight). -%, Si: 3.0 wt .-%).

Durch eine drastische Erhöhung des Si-Gehalts kann der Sättigungsgrad des Stahlwerkstoffs erhöht werden und die Schmelztemperatur auf das Niveau von Gusseisen abgesenkt werden. Somit ist es möglich, Stahl mit Hilfe derjenigen Technik herzustellen, die auch für die Herstellung von Gusseisen, beispielsweise GOE 44, verwendet wird.By drastically increasing the Si content, the degree of saturation of the steel material can be increased and the melting temperature lowered to the level of cast iron. Thus, it is possible to produce steel by means of the technique which is also used for the production of cast iron, for example GOE 44.

Kolbenringe aus hochsiliziumhaltigem Stahlgusswerkstoff sind im Stand der Technik bekannt. Allerdings beeinflusst das in höheren Mengen vorhandene Silizium die Härtbarkeit des Werkstoffs negativ, da dessen Austenitumwandlungstemperatur "Ac3" erhöht wird. Aus der WO 2008/019716 A1 , der EP 1612395 A1 sowie der JP 2000 282177 A sind bereits Zusammensetzungen bekannt geworden, die jedoch keine ausreichende Verschleissbeständigkeit aufweisen.Piston rings of high silicon steel cast material are known in the art. However, the silicon present in higher amounts adversely affects the hardenability of the material as its austenite transformation temperature "Ac3" is increased. From the WO 2008/019716 A1 , of the EP 1612395 A1 as well as the JP 2000 282177 A already compositions have become known, however, have no sufficient wear resistance.

Beschreibung der ErfindungDescription of the invention

Folglich ist es Aufgabe der vorliegenden Erfindung Kolbenringen bereitzustellen, die als Grundkörper eine Stahlwerkstoffzusammensetzung aufweisen, und welche eine verbesserte Verschleißbeständigkeit aufweisen. Die Stahlwerkstoffzusammensetzung soll durch die Herstellung im Schwerkraftguss die Eigenschaften von vergütetem Gusseisen mit Kugelgraphit in mindestens einem der folgenden Punkte übertreffen:

  • Mechanische Eigenschaften wie E-Modul, Biegefestigkeit
  • Widerstandsfähigkeit gegenüber Brüchen
  • Gestaltfestigkeit
  • Flankenverschleiß
  • Laufflächenverschleiß
Accordingly, it is an object of the present invention to provide piston rings which have a base material of a steel material composition and which have improved wear resistance. The composition of the steel material is said to exceed the properties of tempered ductile iron in at least one of the following ways, when manufactured by gravity casting:
  • Mechanical properties such as modulus of elasticity, bending strength
  • Resistance to fractures
  • Gestaltfestigkeit
  • flank wear
  • Treadwear

Diese Aufgabe wird erfindungsgemäß durch Kolberninge gelöst, die als Grundkörper eine Stahlwerkstoffzusammensetzung aufweisen, welche die folgenden Elemente im angegebenen Anteil enthält: C: 0,5 - 1,2 Gew.-% Nb: 0,0 - 7,0 Gew.-% Cr: 0,2 - 20,0 Gew.-% Si: 2,0 - 10,0 Gew.-% Fe: 49,0 - 97,1 Gew.-% Ti: 0,0 - 7,0 Gew.-% Mn: 0,1 - 3,0 Gew.-% V: 0,0 - 7,0 Gew.-% Mo: 0,1 - 3,0 Gew.-% W: 0,0 - 0,5 Gew.-% B: max. 0,5 Gew.-% Cu: max. 2,0 Gew.-% Ni: max. 4,0 Gew.-% P: max. 0,1 Gew.-% Pb: max. 0,05 Gew.-% S: max. 0,05 Gew.-% Sn: max. 0,05 Gew.-% wobei die Summe der Anteile von Nb, Ti, V und W 2,0 - 7,0 Gew.-% beträgt, wobei die Stahlwerkstoffzusammensetzung nur Elemente, ausgewählt aus der Gruppe, bestehend aus B, C, Cr, Cu, Fe, Mn, Mo, Nb, Ni, P, Pb, S, Si, Sn, Ti, V und W enthält, wobei die Summe dieser Elemente 100 Gew.-% ergibt.This object is achieved according to the invention by Kolberninge, which have as a basic body a steel material composition containing the following elements in the specified proportion: C: 0.5 - 1.2 Wt .-% Nb: 0,0 - 7,0 Wt .-% Cr: 0.2-20.0 Wt .-% Si: 2,0 - 10,0 Wt .-% Fe: 49.0 - 97.1 Wt .-% Ti: 0,0 - 7,0 Wt .-% Mn: 0.1 - 3.0 Wt .-% V: 0,0 - 7,0 Wt .-% Not a word: 0.1 - 3.0 Wt .-% W: 0,0 - 0,5 Wt .-% B: Max. 0.5 Wt .-% Cu: Max. 2.0 Wt .-% Ni: Max. 4.0 Wt .-% P: Max. 0.1 Wt .-% Pb: Max. 0.05 Wt .-% S: Max. 0.05 Wt .-% Sn: Max. 0.05 Wt .-% wherein the sum of the proportions of Nb, Ti, V and W is 2.0-7.0 wt%, wherein the steel material composition includes only elements selected from the group consisting of B, C, Cr, Cu, Fe, Mn , Mo, Nb, Ni, P, Pb, S, Si, Sn, Ti, V and W, the sum of these elements being 100 wt%.

Die erhöhte Verschleißbeständigkeit wird erfindungsgemäß durch die Carbidbildner Niob, Titan, Vanadium und Wolfram erreicht. Erfindungsgemäß wurde gefunden, dass ein Anteil von 2,0 - 7,0 Gew.-% dieser Carbidbildner zu einer guten Verschleißfestigkeit führt, ohne dass sich die Bearbeitbarkeit des erhaltenen Werkstoffs so verschlechtern würde, dass sich dadurch die Herstellungskosten unverhältnismäßig erhöhen würden.The increased wear resistance is achieved according to the invention by the carbide formers niobium, titanium, vanadium and tungsten. According to the invention, it has been found that a proportion of 2.0-7.0% by weight of these carbide formers leads to good wear resistance without the machinability of the resulting material deteriorating such that the production costs would thereby increase disproportionately.

In Tabelle 1 findet sich eine Aufstellung der Härte von Carbiden der Elemente Niob, Titan, Vanadium und Wolfram: Tabelle 1 Carbid NbC TiC VC WC W2C Härte HV (50 kg) 2000 3000 2900 2200 3000 Table 1 gives a list of the hardness of carbides of the elements niobium, titanium, vanadium and tungsten: <b> Table 1 </ b> carbide NbC TiC VC WC W 2 C Hardness HV (50 kg) 2000 3000 2900 2200 3000

Die erfindungsgemäßen Kolbenringe haben eine reduzierte Neigung, unter starker Hitze ihre Form zu verändern und haben somit ein dauerhaft hohes Leistungsvermögen und vermindern darüber hinaus den Ölverbrauch.The piston rings according to the invention have a reduced tendency to change their shape under high heat and thus have a permanently high performance and also reduce the oil consumption.

Die erfindungsgemäßen Stahlkolbenringe weisen weiterhin den Vorteil auf, dass ihre Herstellung mit den zur Herstellung von Gusseisen-Werkstücken notwendigen Maschinen und Technologien ermöglicht wird. Zudem entsprechen die Herstellungskosten denen von Gusseisen-Kolbenringen, was dem Hersteller einen Kostenvorteil und eine bessere Wertschöpfung bietet. Ebenso können Werkstoffparameter frei vom Zulieferer eingestellt werden.The steel piston rings according to the invention furthermore have the advantage that their production with the machines and technologies necessary for the production of cast iron workpieces is made possible. In addition, the production costs are equivalent to those of cast iron piston rings, which offers the manufacturer a cost advantage and a better added value. Likewise, material parameters can be set freely by the supplier.

Erfindungsgemäße Kolberinge werden in einem Verfahren hergestellt, welches die folgenden Schritte umfasst:

  1. a. Herstellen einer Schmelze der Ausgangsmaterialien, und
  2. b. Abgießen der Schmelze in eine vorgefertigte Form.
Kolber rings according to the invention are produced in a process comprising the following steps:
  1. a. Producing a melt of the starting materials, and
  2. b. Pouring the melt into a prefabricated mold.

Als Ausgangsmaterialien können beispielsweise Stahlschrott, Kreislaufmaterial und Legierungsstoffe verwendet werden. Der Schmelzprozess erfolgt in einem Ofen, vorzugsweise einem Kupolofen. Anschließend wird ein Rohling unter Erstarrung der Schmelze hergestellt. Der Kolbenring kann dabei mit im Stand der Technik bekannte Methoden gegossen werden, wie beispielsweise Schleuderguss, Strangguss, Stempel-Pressverfahren, Croning oder bevorzugt Grünsandformen.As starting materials, for example, steel scrap, circulation material and alloying materials can be used. The melting process takes place in an oven, preferably a cupola. Subsequently, a blank is produced with solidification of the melt. The piston ring can be cast with methods known in the art, such as centrifugal casting, continuous casting, stamp pressing process, croning or preferably green sand molds.

Nach Erkalten des Kolbenrings wird die Form ausgelehrt und der erhaltene Rohling geputzt.After cooling the piston ring, the mold is ejected and the blank obtained cleaned.

Gegebenenfalls kann der Kolbenring anschließend vergütet werden. Diese erfolgt durch die folgenden Schritte:

  • c. Austenitisieren des Kolberings oberhalb seiner Ac3-Temperartur,
  • d. Abschrecken des Kolbenrings in einem geeigneten Abschreckmedium, und
  • e. Anlassen des Kolbenrings bei einer Temperatur im Bereich von 400 bis 700°C in einem Schutzgasofen.
Optionally, the piston ring can then be tempered. This is done through the following steps:
  • c. Austenitizing the Kolbering above its Ac3 temperament,
  • d. Quenching the piston ring in a suitable quenching medium, and
  • e. Starting the piston ring at a temperature in the range of 400 to 700 ° C in a protective gas furnace.

Als Abschreckmedium wird bevorzugt Öl verwendet.The quenching medium used is preferably oil.

Zur weiteren Härtung des erfindungsgemäßen Kolbenrings kann im Anschluss an die zuvor erwähnten Verfahrensschritte ein Nitrieren des erhaltenen Kolbenrings erfolgen. Dies kann beispielsweise durch Gasnitrieren, Plasmanitrieren oder Drucknitrieren erfolgen.For further curing of the piston ring according to the invention, nitriding of the resulting piston ring can take place after the aforementioned method steps. This can be done for example by gas nitriding, plasma nitriding or pressure nitriding.

Claims (3)

  1. A piston ring, including a steel material composition as the basic element thereof, characterized in that the steel material composition contains the following elements in the portions indicated relative to 100% by weight of the steel material composition: C: 0.5 - 1.2% by weight Cr: 0.2 - 20.0% by weight Fe: 49.0 - 97.1% by weight Mn: 0.1 - 3.0% by weight Mo: 0.1 - 3.0% by weight Nb: 0.0 - 7.0% by weight Si: 2.0 - 10.0% by weight Ti: 0.0 - 7.0% by weight V: 0.0 - 7.0% by weight W: 0.0 - 0.5% by weight B: max. 0.5% by weight Cu: max. 2.0% by weight Ni: max. 4.0% by weight P: max. 0.1% by weight Pb: max. 0.05% by weight S: max. 0.05% by weight Sn: max. 0.05% by weight
    wherein the sum of the portions of Nb, Ti, V and W is from 2.0 to 7.0% by weight, and wherein the steel material composition only contains elements selected from the group consisting of B, C, Cr, Cu, Fe, Mn, Mo, Nb, Ni, P, Pb, S, Si, Sn, Ti, V and W, and wherein the sum of these elements is equal to 100% by weight.
  2. A method for producing a piston ring as recited in claim 1, wherein the production of the piston ring comprises the following steps:
    a. Producing a melt from the starter materials, and
    b. Pouring the melt into a prefabricated mould,
    and the following steps as necessary:
    c. Austenitising the piston ring above its Ac3 temperature,
    d. Quenching the piston ring in a suitable quenching medium, and
    e. Tempering the piston ring at a temperature in the range from 400 to 700°C in a controlled atmosphere furnace.
  3. The method as recited in claim 2, wherein the production of the piston ring comprises the following further step:
    f. Nitriding the piston ring obtained.
EP09744325.3A 2009-02-26 2009-10-13 Piston ring Not-in-force EP2401532B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009010727A DE102009010727B3 (en) 2009-02-26 2009-02-26 Cast steel material composition for producing piston rings and cylinder liners
PCT/EP2009/007355 WO2010097105A1 (en) 2009-02-26 2009-10-13 Steel material composition for producing piston rings and cylinder sleeves

Publications (2)

Publication Number Publication Date
EP2401532A1 EP2401532A1 (en) 2012-01-04
EP2401532B1 true EP2401532B1 (en) 2017-08-16

Family

ID=41506518

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09744325.3A Not-in-force EP2401532B1 (en) 2009-02-26 2009-10-13 Piston ring

Country Status (9)

Country Link
US (1) US8506727B2 (en)
EP (1) EP2401532B1 (en)
JP (1) JP5497798B2 (en)
KR (1) KR20110128269A (en)
CN (1) CN102272490B (en)
BR (1) BRPI0921528A2 (en)
DE (1) DE102009010727B3 (en)
PT (1) PT2401532T (en)
WO (1) WO2010097105A1 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009015008B3 (en) * 2009-03-26 2010-12-02 Federal-Mogul Burscheid Gmbh Piston rings and cylinder liners
EP2785882B1 (en) * 2011-11-30 2016-01-20 Federal-Mogul Corporation High modulus wear resistant gray cast iron for piston ring applications
UA111115C2 (en) 2012-04-02 2016-03-25 Ейкей Стіл Пропертіс, Інк. cost effective ferritic stainless steel
US20150247224A1 (en) * 2012-09-14 2015-09-03 Tata Steel Nederland Technology Bv TiC-PARTICLE-REINFORCED HIGH STRENGTH AND LOW DENSITY STEEL PRODUCTS WITH IMPROVED E-MODULUS AND METHOD FOR PRODUCING SAID PRODUCT
CN103834872A (en) * 2012-11-26 2014-06-04 天工爱和特钢有限公司 Die steel with high-wearing resistance
CN104451361A (en) * 2014-12-25 2015-03-25 常熟市瑞峰模具有限公司 Alloy cast iron mold for production of emulsion bottle
CN107514316A (en) * 2015-05-18 2017-12-26 夏志清 A kind of diesel engine cylinder head
CN105296870A (en) * 2015-11-03 2016-02-03 合肥海源机械有限公司 Preparation method for piston rod of hydraulic cylinder of forklift
US9873928B2 (en) * 2016-03-15 2018-01-23 Federal-Mogul High strength cast iron for cylinder liners
JP7336685B2 (en) * 2018-12-25 2023-09-01 日本製鉄株式会社 Steel materials and parts for refining heat treatment
WO2020136991A1 (en) * 2018-12-25 2020-07-02 日鉄日新製鋼株式会社 Steel material and component

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2280284A (en) * 1940-10-02 1942-04-21 Electro Metallurg Co Method and agent for treating iron and steel
US3295966A (en) * 1964-04-30 1967-01-03 Crucible Steel Co America Versatile low-alloy tool steel
GB1443900A (en) * 1973-03-30 1976-07-28 Crucible Inc Powder metallurgy tool steel article
DE3147461C2 (en) * 1981-12-01 1983-10-13 Goetze Ag, 5093 Burscheid Wear-resistant cast iron alloy of high strength with spherulitic graphite precipitation, its manufacturing process and its use
EP0295111B1 (en) * 1987-06-11 1994-11-02 Aichi Steel Works, Ltd. A steel having good wear resistance
JPH02259048A (en) * 1989-03-31 1990-10-19 Riken Corp Sliding member
JPH0768588B2 (en) * 1989-06-26 1995-07-26 株式会社日立製作所 Method for manufacturing metal rolling rolls
US5081760A (en) * 1989-06-26 1992-01-21 Hitachi, Ltd. Work roll for metal rolling
FR2688231B1 (en) * 1992-03-05 1994-11-10 Pechiney Electrometallurgie COMPOSITE WIRE WITH PLASTIC SHEATH FOR ADDITIONS TO METAL BATHS.
JP3693268B2 (en) * 1995-03-24 2005-09-07 日立金属株式会社 Drive bit
JP2000282177A (en) * 1999-04-02 2000-10-10 Kobe Steel Ltd Steel for piston ring
US6527879B2 (en) * 1999-06-25 2003-03-04 Hitachi Metals Ltd. Self-lubricating piston ring material for internal combustion engine and piston ring
EP1063454B1 (en) * 1999-06-25 2006-04-19 Hitachi Metals, Ltd. Self-lubricating piston ring material for internal combustion engine and piston ring
JP4680380B2 (en) * 2000-12-26 2011-05-11 株式会社リケン Piston ring and manufacturing method thereof
US20060048865A1 (en) * 2002-07-01 2006-03-09 Etsuo Fujita Material for sliding parts having self lubricity and wire material for piston ring
KR101087562B1 (en) * 2003-03-31 2011-11-28 히노 지도샤 가부시키가이샤 Piston for internal combustion engine and producing method thereof
DE102006038670B4 (en) * 2006-08-17 2010-12-09 Federal-Mogul Burscheid Gmbh High silicon steel material for the production of piston rings and cylinder liners
DE102006038669A1 (en) * 2006-08-17 2008-02-28 Federal-Mogul Burscheid Gmbh Steel material, in particular for the production of piston rings

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
PT2401532T (en) 2017-10-17
JP5497798B2 (en) 2014-05-21
CN102272490A (en) 2011-12-07
WO2010097105A1 (en) 2010-09-02
BRPI0921528A2 (en) 2016-03-15
US20110311391A1 (en) 2011-12-22
US8506727B2 (en) 2013-08-13
CN102272490B (en) 2014-10-15
KR20110128269A (en) 2011-11-29
EP2401532A1 (en) 2012-01-04
JP2012518764A (en) 2012-08-16
DE102009010727B3 (en) 2011-01-13

Similar Documents

Publication Publication Date Title
EP2411708B1 (en) Nitriding grade steel material composition for manufacturing piston rings and cylinder liners
EP2401532B1 (en) Piston ring
EP2052094B1 (en) Steel material having a high silicon content for producing piston rings and cylinder sleeves
EP2401530B1 (en) Steel material composition for producing piston rings and cylinder sleeves
EP2401531B1 (en) Piston rings
EP2401533B1 (en) Steel material composition for producing piston rings and cylinder liners
DE60021670T2 (en) Method for producing a tool steel and tool
EP2411553B1 (en) Nitratable piston ring
DE112011100846T5 (en) Massive stabilizer, steel material for the solid stabilizer and manufacturing process of the solid stabilizer
EP2627466B1 (en) Method for producing a piston ring having embedded particles
DE102006041902A1 (en) Components made of ultrahigh-carbon steels with reduced density and high scale resistance
DE10049598A1 (en) Production of a cast iron material used e.g. in the production of piston rings comprises forming a melt, producing a blank with a white cast structure, and holding the blank
EP2052096B1 (en) Steel piston ring
EP3061838B1 (en) Blank bainite long product and method for producing the same
DE102006024414B4 (en) Piston rings and cylinder liners
DE102010042413B4 (en) Piston ring with embedded gas bubbles

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20110322

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

DAX Request for extension of the european patent (deleted)
17Q First examination report despatched

Effective date: 20160418

RIC1 Information provided on ipc code assigned before grant

Ipc: C22C 38/28 20060101ALI20170406BHEP

Ipc: C22C 38/26 20060101ALI20170406BHEP

Ipc: F16J 9/26 20060101AFI20170406BHEP

Ipc: C22C 38/22 20060101ALI20170406BHEP

Ipc: C22C 38/34 20060101ALI20170406BHEP

Ipc: C22C 38/24 20060101ALI20170406BHEP

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20170519

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 919383

Country of ref document: AT

Kind code of ref document: T

Effective date: 20170915

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 9

REG Reference to a national code

Ref country code: SE

Ref legal event code: TRGR

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502009014273

Country of ref document: DE

REG Reference to a national code

Ref country code: PT

Ref legal event code: SC4A

Ref document number: 2401532

Country of ref document: PT

Date of ref document: 20171017

Kind code of ref document: T

Free format text: AVAILABILITY OF NATIONAL TRANSLATION

Effective date: 20171004

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20170816

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170816

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170816

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170816

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20171116

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20171116

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20171117

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170816

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170816

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20171216

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170816

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170816

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170816

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170816

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502009014273

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170816

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170816

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170816

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170816

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20180517

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20171031

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20171031

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20171013

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20171031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20171031

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170816

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 10

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170816

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20171013

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20180920

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20180926

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: PT

Payment date: 20180927

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20181018

Year of fee payment: 10

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20091013

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20170816

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170816

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20190917

Year of fee payment: 11

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170816

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20190925

Year of fee payment: 11

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170816

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200515

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20191013

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20191013

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20191031

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20191013

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20201008

Year of fee payment: 12

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 502009014273

Country of ref document: DE

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 919383

Country of ref document: AT

Kind code of ref document: T

Effective date: 20201013

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210501

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20201013

REG Reference to a national code

Ref country code: SE

Ref legal event code: EUG

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20211014