DE102007025758A1 - seal - Google Patents

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Publication number
DE102007025758A1
DE102007025758A1 DE200710025758 DE102007025758A DE102007025758A1 DE 102007025758 A1 DE102007025758 A1 DE 102007025758A1 DE 200710025758 DE200710025758 DE 200710025758 DE 102007025758 A DE102007025758 A DE 102007025758A DE 102007025758 A1 DE102007025758 A1 DE 102007025758A1
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Prior art keywords
weight
sealing ring
base material
elements
following
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DE200710025758
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German (de)
Inventor
Henry Dr. rer. nat. Bosch
Roland Ruch
Lutz Steinert
Klaus Dr. Wintrich
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Mahle International GmbH
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Mahle International GmbH
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Priority to DE200710025758 priority Critical patent/DE102007025758A1/en
Priority to EP08156343A priority patent/EP1997921A3/en
Priority to JP2008138913A priority patent/JP2008304059A/en
Publication of DE102007025758A1 publication Critical patent/DE102007025758A1/en
Withdrawn legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C19/00—Alloys based on nickel or cobalt
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C19/00—Alloys based on nickel or cobalt
    • C22C19/03—Alloys based on nickel or cobalt based on nickel
    • C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
    • C22C19/051—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C19/00—Alloys based on nickel or cobalt
    • C22C19/03—Alloys based on nickel or cobalt based on nickel
    • C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
    • C22C19/051—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W
    • C22C19/055—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W with the maximum Cr content being at least 20% but less than 30%
    • 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
    • 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
    • C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
    • 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
    • C22C38/10—Ferrous alloys, e.g. steel alloys containing cobalt
    • C22C38/105—Ferrous alloys, e.g. steel alloys containing cobalt containing Co and Ni
    • 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
    • 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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • 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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel 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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
    • 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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese

Abstract

Die vorliegende Erfindung betrifft einen Dichtring, insbesondere einen Wellendichtring für einen Turbolader, der entweder ein Grundmaterial auf Eisenbasis oder ein Grundmaterial auf einer Nickelbasislegierung aufweist und zudem boriert ist.The present invention relates to a sealing ring, in particular a shaft seal for a turbocharger having either an iron-based base material or a base material on a nickel-based alloy and is also boriert.

Description

Die Erfindung betrifft einen Dichtring, insbesondere einen Wellendichtring für einen Turbolader.The The invention relates to a sealing ring, in particular a shaft seal for one Turbocharger.

Abhängig von der Position eines Dichtringes in einem Turbolader muss der Werkstoff des Dichtringes, insbesondere eines Wellendichtringes, verschiedene Eigenschaften aufweisen, um insbesondere eine Dichtfunktion über die gesamte Lebensdauer des Turboladers garantieren zu können. Die Dichtfunktion wird dabei hauptsächlich von einer Verschleißbeständigkeit beziehungsweise einer Kriechneigung der Dichtringe beeinflusst, so dass insbesondere bei neuen und hochbelasteten Turboladern, beispielsweise für Ottomotoren, neben einer hohen Verschleißbeständigkeit auch eine ausreichend hohe Kriechbeständigkeit gefordert wird. Die bisher für derartige Dichtringe verwendeten Werkstoffe, insbesondere Werkzeugstähle, sind von ihrer Kriechbeständigkeit nicht ausreichend, während austenitische Werkstoffe oder Nickelbasislegierungen oftmals keine ausreichende Verschleißbeständigkeit aufweisen.Depending on The position of a sealing ring in a turbocharger must be the material of the sealing ring, in particular a shaft seal, various Have in particular a sealing function over the guarantee the entire life of the turbocharger. The sealing function becomes mainly from a wear resistance or a creep of the sealing rings influenced, so that especially in new and highly loaded turbochargers, for example for gasoline engines, besides a high wear resistance Also, a sufficiently high creep resistance is required. The so far for such Sealing rings used materials, especially tool steels are from their creep resistance not enough while austenitic materials or nickel-based alloys often none have sufficient wear resistance.

Die Erfindung beschäftigt sich mit dem Problem, für einen Dichtring eine verbesserte Ausführungsform anzugeben, welche insbesondere die aus dem Stand der Technik bekannten Nachteile überwindet.The Invention busy dealing with the problem, for to provide a sealing ring an improved embodiment, which in particular overcomes the disadvantages known from the prior art.

Dieses Problem wird erfindungsgemäß durch den Gegenstand des unabhängigen Anspruchs 1 gelöst. Vorteilhafte Ausführungsformen sind Gegenstand der abhängigen Ansprüche.This Problem is inventively the subject of the independent Claim 1 solved. Advantageous embodiments are Subject of the dependent Claims.

Die Erfindung beruht auf dem allgemeinen Gedanken, für einen Dichtring, insbesondere für einen Wellendichtring eines Turboladers, ein Grundmaterial auf Eisenbasis oder auf einer Nickelbasislegierung zu verwenden und den Dichtring zu borieren. Unter Borieren versteht man ein thermochemisches Randschichthärteverfahren zur Erzeugung einer verschleißfesten Oberfläche auf einem Werkstück, wobei beim Borieren das chemische Element Bor in die Randzone eines Werkstoffes, hier in die Randzone des Dichtringes, bei einer Temperatur zwischen 850 und 950°C eingebracht wird. Hierbei bildet sich bis in eine Tiefe von ca. 250 μm eine Boridschicht, welche eine gute Verankerung zum Grundmaterial des Dichtringes bewirkt. Prinzipiell wird durch das Borieren einerseits eine hohe Verschleißfestigkeit und andererseits eine hohe Kriechbeständigkeit des Materials erreicht. Darüber hinaus ermöglicht das Borieren einen Einsatz der Dichtringe bei hohen mechanischen und tribologischen Belastungen bei Temperaturen von bis zu 850°C. Im Unterschied zu Verschleißschutzschichten, welche beispielsweise durch ein PVD-Verfahren aufgebracht werden, wird durch das Borieren eine deutlich verbesserte Verankerung der Verschleißschutzschicht mit dem Grundwerkstoff des Dichtringes bewirkt.The Invention is based on the general idea, for a sealing ring, in particular for one Shaft seal of a turbocharger, an iron-based base material or on a nickel base alloy and use the sealing ring to bore. By boriding is meant a thermochemical surface hardening process for producing a wear-resistant surface on a workpiece, Boron, the chemical element boron in the edge zone of a Material, here in the edge zone of the sealing ring, at a temperature between 850 and 950 ° C is introduced. This forms up to a depth of approx. 250 μm one Boridschicht, which is a good anchorage to the basic material of Sealing ring causes. In principle, boriding on the one hand a high wear resistance and on the other hand achieves a high creep resistance of the material. About that also allows Boring an insert of the sealing rings at high mechanical and tribological loads at temperatures of up to 850 ° C. In difference to wear protection layers, which are applied, for example, by a PVD process, By boriding a significantly improved anchoring of the Wear protection layer effected with the base material of the sealing ring.

Zweckmäßig ist das Grundmaterial auf Eisenbasis zumindest teilweise austenitisch. Als Austenit werden γ-Mischkristalle des Eisens bezeichnet, wobei Austenit üblicherweise eine kubischflächen-zentrierte Struktur aufweist. Das Gefüge an sich besitzt eine geringe Härte, welche jedoch beispielsweise durch Kaltverformung gesteigert werden kann.Is appropriate the iron-based base material is at least partially austenitic. As austenite are γ-mixed crystals of iron, with austenite usually having a cubic area centered Structure has. The structure in itself has a low hardness, which, however, can be increased for example by cold working.

Alternativ dazu ist denkbar, dass das Grundmaterial auf Eisenbasis zumindest teilweise martensitisch ist. Martensit ist ein metastabiles Gefüge von Festkörpern, das die diffusionslos und athermische durch eine kooperative Scherbewegung aus dem Ausgangsgefüge entsteht. Beispielsweise kann der im Austenit gelöste Kohlenstoff durch eine sehr rasche Abkühlung, beispielsweise beim Abschrecken, zwangsgelöst werden, wodurch ein sehr hartes Gefüge entsteht. Die Abkühlgeschwindigkeit, bei welcher erste Anteile von Martensit, neben Ferrit, Perlit und Bainit entstehen, heißt dabei untere kritische Abkühlgeschwindigkeit. Generell wird Martensit bei Stählen verwendet, um einen Härteanstieg zu erzielen. Je höher dabei der Kohlenstoffgehalt des Martensits ist, desto höher ist auch dessen Härte.alternative It is conceivable that the iron-based base material at least partially martensitic. Martensite is a metastable structure of solids that the non-diffusion and athermal by a cooperative shearing motion from the initial structure arises. For example, the carbon dissolved in the austenite can by a very rapid cooling, For example, during quenching, be forcibly dissolved, creating a very hard structure arises. The cooling rate, in which first parts of martensite, in addition to ferrite, perlite and bainite arise, means while lower critical cooling rate. Generally martensite is used in steels, a hardness increase to achieve. The higher while the carbon content of martensite is the higher also its hardness.

Als weitere Alternative ist denkbar, dass das Grundmaterial auf Eisenbasis zumindest teilweise bainitisch ist. Bainit bildet sich dabei bei Temperaturen, welche zwischen den für die Perlit- bzw. Martensitbildung liegen. Anders als bei der Bildung von reinem Martensit sind hier Umklappvorgänge im Kristallgitter und Diffusionsvorgänge gekoppelt, wodurch verschiedene Umwandlungsmechanismen möglich werden.When Another alternative is conceivable that the base material is iron-based at least partially bainitic. Bainite is formed Temperatures which are between those for the perlite or martensite formation lie. Unlike the formation of pure martensite are here Umklappvorgänge coupled in the crystal lattice and diffusion processes, creating different Conversion mechanisms are possible.

Alle in der Beschreibung und in den nachfolgenden Ansprüchen dargestellten Merkmale können dabei sowohl einzeln als auch in beliebiger Form miteinander kombiniert erfindungswesentlich sein.All in the description and in the following claims Features can be included both individually and in any form combined be essential to the invention.

Claims (11)

Dichtring, insbesondere ein Wellendichtring für einen Turbolader, der ein Grundmaterial auf Eisenbasis oder auf einer Nickelbasislegierung aufweist und boriert ist.Sealing ring, in particular a shaft seal for a Turbocharger containing an iron-based base material or on one Nickel-based alloy and is borated. Dichtring nach Anspruch 1, dadurch gekennzeichnet, – dass das Grundmaterial auf Eisenbasis zumindest teilweise austenitisch ist, oder – dass das Grundmaterial auf Eisenbasis zumindest teilweise ferritisch ist, oder – dass das Grundmaterial auf Eisenbasis zumindest teilweise perlitisch, bainitisch oder martensitisch ist.Sealing ring according to claim 1, characterized - that this Iron-based base material is at least partially austenitic, or - that the iron-based base material is at least partially ferritic is, or - that the iron-based base material is at least partially pearlitic, bainitic or martensitic. Dichtring nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Grundmaterial zumindest eines der folgenden Elemente in der nachfolgend genannten Konzentration aufweist: – C: 0,0–0,9 Gew.-%, – Si: 0,0–3,0 Gew.-%, – Mn: 0,0–19,0 Gew.-%, – P, S, B: 0,0–0,5 Gew.-%, – Cr: 3,0–27,0 Gew.-%, – Mo: 0,0–6,0 Gew.-%, – Ni: 0,0–37,0 Gew.-%, – Al, Ti: 0,0–6,0 Gew.-%, – N: 0,0–0,5 Gew.-%, – Nb, V: 0,0–2,5 Gew.-%, – W, Cu: 0,0–3,0 Gew.-%, – Co: 0,0–17,0 Gew.-%, – Fe: 35,0–97,0 Gew.-%, – sowie herstellungsbedingte Verunreinigungen anderer Elemente.Sealing ring according to claim 1 or 2, characterized that the base material at least one of the following elements in the having the following concentration: C: 0.0-0.9% by weight, Si: 0.0-3.0% by weight, Mn: 0.0-19.0% by weight, - P, S, B: 0.0-0.5 Wt .-%, - Cr: 3.0 to 27.0 Wt .-%, - Not a word: 0.0 to 6.0 Wt .-%, - Ni: 0.0 to 37.0 Wt .-%, - Al, Ti: 0.0-6.0 Wt .-%, - N: 0.0-0.5 Wt .-%, - Nb, V: 0.0-2.5 Wt .-%, - W, Cu: 0.0-3.0 Wt .-%, - Co: 0.0 to 17.0 Wt .-%, - Fe: 35.0 to 97.0 Wt .-%, - such as Production-related contamination of other elements. Dichtring nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Grundmaterial zumindest eines der folgenden Elemente in der nachfolgend genannten Konzentration aufweist: – C: 0,0–0,2 Gew.-%, – Si: 0,0–2,0 Gew.-%, – Mn: 0,0–2,0 Gew.-%, – P, S, B: 0,0–0,05 Gew.-%, – Al: 0,0–0,4 Gew.-%, – Cr: 13,0–17,0 Gew.-%, – Mo: 1,0–2,0 Gew.-%, – Ni: 23,5–27,5 Gew.-%, – Ti: 1,0–3,0 Gew.-%, – V: 0,0–1,0 Gew.-%, – Fe: 45,0–62,5 Gew.-%, – sowie herstellungsbedingte Verunreinigungen anderer Elemente.Sealing ring according to claim 1 or 2, characterized that the base material at least one of the following elements in the having the following concentration: C: 0.0-0.2% by weight, Si: 0.0-2.0% by weight, Mn: 0.0-2.0% by weight, - P, S, B: 0.0-0.05 Wt .-%, - Al: 0.0 to 0.4 Wt .-%, - Cr: 13.0 to 17.0 Wt .-%, - Not a word: 1.0-2.0 Wt .-%, - Ni: 23.5 to 27.5 Wt .-%, - Ti: 1.0-3.0 Wt .-%, - V: 0.0-1.0 Wt .-%, - Fe: 45.0 to 62.5 Wt .-%, - such as Production-related contamination of other elements. Dichtring nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Grundmaterial zumindest eines der folgenden Elemente in der nachfolgend genannten Konzentration aufweist: – C: 0,0–0,7 Gew.-%, – Si: 0,0–1,0 Gew.-%, – Mn: 5,0–10,0 Gew.-%, – P, S: 0,0–0,5 Gew.-%, – Cr: 14,0–23,0 Gew.-%, – Mo: 0,0–5,0 Gew.-%, – Ni: 0,0–15,0 Gew.-%, – Ti: 0,0–0,5 Gew.-%, – N: 0,0–0,5 Gew.-%, – Nb: 0,0–1,3 Gew.-%, – V: 0,0–1,2 Gew.-%, – W: 0,0–1,0 Gew.-%, – B: 0,0–0,1 Gew.-%, – Co: 0,0–2,0 Gew.-%, – Cu: 0,0–2,0 Gew.-%, – Fe: 40,0–81,0 Gew.-%, – sowie herstellungsbedingte Verunreinigungen anderer Elemente.Sealing ring according to claim 1 or 2, characterized that the base material at least one of the following elements in the having the following concentration: C: 0.0-0.7% by weight, Si: 0.0-1.0 wt.%, Mn: 5.0-10.0% by weight, - P, S: 0.0-0.5 Wt .-%, - Cr: 14.0 to 23.0 Wt .-%, - Not a word: 0.0-5.0 Wt .-%, - Ni: 0.0 to 15.0 Wt .-%, - Ti: 0.0-0.5 Wt .-%, - N: 0.0-0.5 Wt .-%, - Nb: 0.0 to 1.3 Wt .-%, - V: 0.0-1.2 Wt .-%, - W: 0.0-1.0 Wt .-%, - B: 0.0-0.1 Wt .-%, - Co: 0.0-2.0 Wt .-%, - Cu: 0.0-2.0 Wt .-%, - Fe: 40.0 to 81.0 Wt .-%, - such as Production-related contamination of other elements. Dichtring nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Grundmaterial zumindest eines der folgenden Elemente in der nachfolgend genannten Konzentration aufweist: – C: 0,5–1,8 Gew.-%, – Si: 0,0–1,0 Gew.-%, – Mn: 0,0–1,5 Gew.-%, – P, S: 0,0–0,5 Gew.-%, – Cr, Mo: 2,0–7,0 Gew.-%, – Ni, Co: 0,0–15,0 Gew.-%, – Ti: 0,0–0,5 Gew.-%, – Cu: 0,0–2,0 Gew.-%, – N: 0,0–0,3 Gew.-%, – Nb: 0,0–1,5 Gew.-%, – V: 0,5–3,0 Gew.-%, – W: 2,0–9,0 Gew.-%, – B: 0,0–0,1 Gew.-%, – Fe: 40,0–93,5 Gew.-%, – sowie herstellungsbedingte Verunreinigungen anderer ElementeSealing ring according to claim 1 or 2, characterized that the base material at least one of the following elements in the having the following concentration: C: 0.5-1.8% by weight, Si: 0.0-1.0 wt.%, Mn: 0.0-1.5% by weight, - P, S: 0.0-0.5 Wt .-%, - Cr, Mo: 2.0-7.0 Wt .-%, - Ni, Co: 0.0-15.0 Wt .-%, - Ti: 0.0-0.5 Wt .-%, - Cu: 0.0-2.0 Wt .-%, - N: 0.0-0.3 Wt .-%, - Nb: 0.0 to 1.5 Wt .-%, - V: 0.5-3.0 Wt .-%, - W: 2.0 to 9.0 Wt .-%, - B: 0.0-0.1 Wt .-%, - Fe: 40.0 to 93.5 Wt .-%, - such as Production-related contamination of other elements Dichtring nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Grundmaterial zumindest eines der folgenden Elemente in der nachfolgend genannten Konzentration aufweist: – C: 0,0–2,7 Gew.-%, – Si: 0,2–2,3 Gew.-%, – Mn: 0,0–1,5 Gew.-%, – P, S: 0,0–0,5 Gew.-%, – Cr: 22,0–37,0 Gew.-%, – Mo, Cu: 0,0–3,0 Gew.-%, – Ni: 0,0–6,0 Gew.-%, – N, Ti: 0,0–0,5 Gew.-%, – V, Nb: 0,0–1,5 Gew.-%, – W, Co: 0,0–2,0 Gew.-%, – B: 0,0–0,1 Gew.-%, – Fe: 40,0–77,9 Gew.-%, – sowie herstellungsbedingte Verunreinigungen anderer ElementeSealing ring according to claim 1 or 2, characterized that the base material at least one of the following elements in the having the following concentration: C: 0.0-2.7% by weight, Si: 0.2-2.3% by weight, Mn: 0.0-1.5% by weight, - P, S: 0.0-0.5 Wt .-%, - Cr: 22.0 to 37.0 Wt .-%, - Not a word, Cu: 0.0-3.0 Wt .-%, - Ni: 0.0 to 6.0 Wt .-%, - N, Ti: 0.0-0.5 Wt .-%, - V, Nb: 0.0-1.5 Wt .-%, - W, Co: 0.0-2.0 Wt .-%, - B: 0.0-0.1 Wt .-%, - Fe: 40.0 to 77.9 Wt .-%, - such as Production-related contamination of other elements Dichtring nach Anspruch 1, dadurch gekennzeichnet, dass das Grundmaterial zumindest eines der folgenden Elemente in der nachfolgend genannten Konzentration aufweist: – C: 0,0–0,2 Gew.-%, – Si: 0,0–1,0 Gew.-%, – Mn: 0,0–1,0 Gew.-%, – P, S, B: 0,0–0,5 Gew.-%, – Cr: 8,0–31,0 Gew.-%, – Mo: 0,0–15,0 Gew.-%, – Fe: 0,0–36,0 Gew.-%, – Ti: 0,0–5,0 Gew.-%, – N, La: 0,0–0,5 Gew.-%, – Nb: 0,0–5,5 Gew.-%, – V, Cu: 0,0–2,0 Gew.-%, – Hf, Zr: 0,0–2,0 Gew.-%, – W: 0,0–14,0 Gew.-%, – Co: 0,0–20,0 Gew.-%, – Ni: 40,0–92,0 Gew.-%, – sowie herstellungsbedingte Verunreinigungen anderer ElementeSealing ring according to claim 1, characterized in that the base material has at least one of the following elements in the following concentration: - C: 0.0-0.2 wt .-%, - Si: 0.0-1.0 wt. %, Mn: 0.0-1.0 wt.%, P, S, B: 0.0-0.5 wt.%, Cr: 8.0-31.0 wt. %, - Mo: 0.0-15.0 wt .-%, - Fe: 0.0-36.0 wt .-%, - Ti: 0.0-5.0 wt .-%, - N, La: 0.0-0.5% by weight, - Nb: 0.0-5.5% by weight, - V, Cu: 0.0-2.0% by weight, - Hf, Zr: 0.0-2.0% by weight, - W: 0.0-14.0 wt .-%, - Co: 0.0-20.0 wt .-%, - Ni: 40.0-92.0 wt .-%, - and production-related impurities of other elements Dichtring nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass eine Schichtdicke einer Borierschicht 1 bis 50 μm beträgt.Sealing ring according to one of claims 1 to 8, characterized a layer thickness of a boriding layer is 1 to 50 μm. Verfahren zum Herstellen eines Dichtrings nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, – dass zum Borieren feste, flüssige, insbesondere pastenartige, oder gasförmige Borspender verwendet werden, und/oder – dass das Grundmaterial des Dichtrings gesintert oder gegossen wird.Method for producing a sealing ring after a the claims 1 to 9, characterized - that to Borieren solid, liquid, in particular paste-like, or gaseous Borspender used be, and / or - that the base material of the sealing ring is sintered or cast. Verfahren nach Anspruch 10, dadurch gekennzeichnet, – dass der Dichtring aus Stangenvollmaterial oder aus rohrförmigen Halbzeugen gedreht wird, oder – dass der Dichtring aus Draht gewickelt wird.Method according to claim 10, characterized in that - that the Sealing ring is made of solid rod or of tubular semi-finished products, or - that the sealing ring is wound from wire.
DE200710025758 2007-06-01 2007-06-01 seal Withdrawn DE102007025758A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE200710025758 DE102007025758A1 (en) 2007-06-01 2007-06-01 seal
EP08156343A EP1997921A3 (en) 2007-06-01 2008-05-16 Gasket
JP2008138913A JP2008304059A (en) 2007-06-01 2008-05-28 Sealing ring

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