WO1998035067A1 - Nickel-free austenitic cobalt-based alloy - Google Patents

Nickel-free austenitic cobalt-based alloy Download PDF

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Publication number
WO1998035067A1
WO1998035067A1 PCT/DE1998/000296 DE9800296W WO9835067A1 WO 1998035067 A1 WO1998035067 A1 WO 1998035067A1 DE 9800296 W DE9800296 W DE 9800296W WO 9835067 A1 WO9835067 A1 WO 9835067A1
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Prior art keywords
nickel
cobalt
alloy
molybdenum
titanium
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PCT/DE1998/000296
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German (de)
French (fr)
Inventor
Gernot Hausch
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Vacuumschmelze Gmbh
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Application filed by Vacuumschmelze Gmbh filed Critical Vacuumschmelze Gmbh
Priority to JP53355298A priority Critical patent/JP2001512529A/en
Priority to EP98909320A priority patent/EP0963453A1/en
Publication of WO1998035067A1 publication Critical patent/WO1998035067A1/en

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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
    • C22C19/07—Alloys based on nickel or cobalt based on cobalt

Definitions

  • the invention relates to a nickel-free, austenitic cobalt-based alloy with high corrosion resistance and good formability.
  • Austenitic stainless steels are normally used for everyday consumer goods, which require, among other things, corrosion resistance, good formability and non-magnetizability. These steels are alloys that contain chromium, nickel and molybdenum as the main constituent.
  • Austenitic cobalt-based alloys are used to meet the highest demands on corrosion resistance. As these alloys all contain nickel, there is a risk of a so-called nickel allergy if the consumer goods made from them come into contact with the skin. In particular, there is a risk of nickel allergy in the case of eyeglass frames, ear plugs, wristwatches and medical implants.
  • Nickel-free iron-based austenitic alloys are known. For example, there are nickel-free, nitrogen-alloyed steels based on iron-manganese-chromium (molybdenum) with 0.5 to 1.5% by weight nitrogen, the high nitrogen content being introduced by nitrogen under pressure. These alloys are described in detail in Results of Materials Research, Volume 4, Thubal-Kain, 1991, for example. Another 1.4456 (Fe-18Cr-18Mn-2Mo-0, 9N) is a representative of these nickel-free nitrogen-alloyed steels. The manganese content has no austenitic stabilizing effect here, but only serves to increase nitrogen solubility.
  • the high manganese content has a negative effect on the corrosion resistance.
  • the nitrogen alloy steel 1.4456 also does not have satisfactory corrosion resistance.
  • This alloy has excellent corrosion resistance and good formability and is non-magnetic. Furthermore, it can be easily cast into complicated shapes and, if necessary, further processed.
  • the object of the invention is achieved in provided that it is surprising that it has been found that this alloy is in principle a cobalt-chromium-molybdenum-nickel alloy in which the nickel, which essentially brings about the austenite stability, can be replaced by iron and titanium and / or niobium. This is surprising insofar as titanium shows an austenite-destabilizing effect in places with niobium.
  • cobalt-chromium-molybdenum-titanium alloys have long been known.
  • the alloy "Dentitan" with 24% by weight chromium, 4% by weight molybdenum, 2.5% by weight titanium, the rest cobalt is used as a casting alloy in dental technology.
  • these alloys lack the iron content of the alloy according to the invention and thus the austenite stability required for good cold formability.
  • the alloying elements must be suitably matched for the intended purpose as wrought alloy. It was found that the chromium + molybdenum + X A tungsten + titanium / niobium content may not exceed 28% by weight, the titanium / niobium content being in the range from 4 to 6% by weight, the content of chromium in the range 10 to 20 wt .-%, the content of molybdenum + x ⁇ tungsten must be in the range 4 to 8 wt .-%.
  • chromium and molybdenum / tungsten are necessary in order to achieve a high level of corrosion resistance, while the stated contents of titanium or niobium are the setting of a single-phase austenitic structure. The desired good cold and hot formability is only guaranteed in this structural state.
  • the structure of the alloy obtained is mostly hexagonal and the good cold formability is no longer given.
  • the alloys thus obtained are ductile, have excellent corrosion 'sbestieri- ness against tissue and body fluids and can be easily cast into complex shapes and further processed, such as eyeglass frames, so that this alloy in addition to the use as a material in the jewelry and the eyewear industry is also particularly suitable as a material for dental prostheses and general surgical implants.
  • a hardness in the 75% cold worked condition 490 HV tensile strength 75% cold worked: 1900 MPa yield strength 75% cold worked: 1370 MPas elongation 75% cold worked: 1.5%

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Materials For Medical Uses (AREA)

Abstract

Disclosed is a nickel-free austenitic cobalt-based alloy, exhibiting corrosion resistance and good malleability. The inventive alloy consists of 10-18% chrome, 4-6 % (titanium and/or niobium), 0-3 % manganese, 0-3 % aluminium, 0-2 % copper 4-8 % (molybdenum + 1/2 tungsten), 5-20 % iron, 0-1 % silicon, 0-0.1 % (carbon + nitrogen), residual cobalt and production-related impurities. The inventive alloy also exhibits excellent cold forming properties and can be hardened by tempering.

Description

Beschreibungdescription
Nickelfreie, austenitische KobaltbasislegierungNickel-free, austenitic cobalt-based alloy
Die Erfindung betrifft eine nickelfreie, austenitische Kobaltbasislegierung mit hoher Korrosionsbeständigkeit und guter Umformbarkeit.The invention relates to a nickel-free, austenitic cobalt-based alloy with high corrosion resistance and good formability.
Für Bedarfsgegenstände des täglichen Gebrauchs, bei denen un- ter anderem Korrosionsbeständigkeit, gute Umformbarkeit und Nichtmagnetisierbarkeit gefordert werden, werden üblicherweise austenitische rostfreie Stähle eingesetzt. Diese Stähle sind Legierungen, die neben Eisen als Hauptbestandteil noch Chrom, Nickel und Molybdän enthalten.Austenitic stainless steels are normally used for everyday consumer goods, which require, among other things, corrosion resistance, good formability and non-magnetizability. These steels are alloys that contain chromium, nickel and molybdenum as the main constituent.
Für höchste Ansprüche an die Korrosionsbeständigkeit werden austenitische Legierungen auf Kobaltbasis eingesetzt. Da diese Legierungen alle Nickel enthalten, besteht die Gefahr des Auftretens einer sogenannten Nickelallergie, wenn die daraus hergestellten Bedarfsgegenstände mit der Haut in Berührung kommen. Insbesondere besteht diese Gefahr einer Nickelallergie bei Brillengestellen, Ohrsteckern, Armbanduhren sowie bei medizinischen Implantaten.Austenitic cobalt-based alloys are used to meet the highest demands on corrosion resistance. As these alloys all contain nickel, there is a risk of a so-called nickel allergy if the consumer goods made from them come into contact with the skin. In particular, there is a risk of nickel allergy in the case of eyeglass frames, ear plugs, wristwatches and medical implants.
Um die Gefahr des Auftretens einer Nickelallergie prinzipiell auszuschließen, besteht daher seit langem der Wunsch nach der Schaffung einer nickelfreien Legierung, die die wesentlichen Eigenschaften der aus der eingangs genannten austenitischen rostfreien Stähle aufweist.In order to rule out the risk of a nickel allergy occurring, there has long been a desire to create a nickel-free alloy which has the essential properties of the austenitic stainless steels mentioned at the beginning.
Nickelfreie austenitische Legierungen auf Eisenbasis sind bekannt. Beispielsweise gibt es nickelfreie, Stickstofflegierte Stähle auf Eisen-Mangan-Chrom(Molybdän) -Basis mit 0,5 bis 1,5 Gew.-% Stickstoff, wobei der hohe Stickstoffgehalt durch Auf- stickung unter Druck eingebracht wird. Diese Legierungen sind beispielsweise in Ergebnisse der Werkstoff-Forschung, Band 4, Verlag Thubal-Kain, 1991 eingehend beschrieben. Ein weiterer Vertreter dieser nickelfreien Stickstofflegierten Stähle ist der Werkstoff 1.4456 (Fe-18Cr-18Mn-2Mo-0, 9N) . Der Mangangehalt hat hier keine austenitisch stabilisierende Wirkung, sondern er dient nur zur Erhöhung der Stickstofflöslichkeit .Nickel-free iron-based austenitic alloys are known. For example, there are nickel-free, nitrogen-alloyed steels based on iron-manganese-chromium (molybdenum) with 0.5 to 1.5% by weight nitrogen, the high nitrogen content being introduced by nitrogen under pressure. These alloys are described in detail in Results of Materials Research, Volume 4, Thubal-Kain, 1991, for example. Another 1.4456 (Fe-18Cr-18Mn-2Mo-0, 9N) is a representative of these nickel-free nitrogen-alloyed steels. The manganese content has no austenitic stabilizing effect here, but only serves to increase nitrogen solubility.
Diese nickelfreien Legierungen haben jedoch den großen Nachteil, daß sie nicht gleichzeitig die Forderung nach hoher Korrosionsbeständigkeit, Unmagnetisierbarkeit und guter Umformbarkeit erfüllen.However, these nickel-free alloys have the major disadvantage that they do not simultaneously meet the requirements for high corrosion resistance, non-magnetizability and good formability.
Bei den Stickstofflegierten Eisen-Mangan-Chrom(Molybdän) - Stählen wirkt sich der hohe Mangangehalt negativ auf die Korrosionsbeständigkeit aus. Der Stickstofflegierte Stahl 1.4456 weist ebenfalls keine befriedigende Korrosionsbeständigkeit auf .In the case of nitrogen-alloyed iron-manganese-chromium (molybdenum) steels, the high manganese content has a negative effect on the corrosion resistance. The nitrogen alloy steel 1.4456 also does not have satisfactory corrosion resistance.
Aufgabe der vorliegenden Erfindung ist es daher, eine nickelfreie, austenitische Legierung zu schaffen, die eine hohe Unmagnetisierbarkeit eine sehr gute Korrosionsbeständigkeit und eine gute Umformbarkeit aufweist.It is therefore an object of the present invention to provide a nickel-free, austenitic alloy which has a high level of non-magnetizability, very good corrosion resistance and good formability.
Es hat sich herausgestellt, daß dieses Ziel durch eine nickelfreie austenitische Kobaltbasislegierung, bestehend ausIt has been found that this goal is achieved by a nickel-free austenitic cobalt-based alloy consisting of
10 - 18 % Chrom 4 - 8 % (Molybdän + * Wolfram)10 - 18% chromium 4 - 8% (molybdenum + * tungsten)
4 - 6 % (Titan und/oder Niob) 5 - 20 % Eisen4 - 6% (titanium and / or niobium) 5 - 20% iron
0 - 3 % Mangan 0 - 1 % Silizium0 - 3% manganese 0 - 1% silicon
0 - 3 % Aluminium 0 - 0,1 % (Kohlenstoff +0 - 3% aluminum 0 - 0.1% (carbon +
Stickstoff)Nitrogen)
0 - 2 % Kupfer0 - 2% copper
Rest Kobalt und den üblichen herstellungsbedingten Verunreinigungen erreicht werden kann. Diese Legierung weist eine hervorragende Korrosionsbeständigkeit sowie eine gute Umformbarkeit auf und ist unmagnetisch. Ferner läßt sie sich leicht zu komplizierten Formen vergießen und gegebenenfalls weiterverarbeiten. Die Lösung der erfindungsgemäßen Aufgabe ist in sofern überraschend, daß es sich herausgestellt hat, daß diese Legierung im Prinzip eine Kobalt-Chrom-Molybdän-Nickel- Legierung ist, bei der das Nickel, das im wesentlichen die Austenitstabilität bewirkt, durch Eisen und Titan und/oder Niob ersetzt werden kann. Dies ist in sofern überraschend, als Titan bei Niob bei Stellen eine austenitdestabilisierende Wirkung zeigen. Kobalt-Chrom-Molybdän-Titan-Legierungen sind im Prinzip schon länger bekannt. Beispielsweise wird die Legierung „Dentitan" mit 24 Gew.-% Chrom, 4 Gew. -% Molybdän, 2,5 Gew.-% Titan, Rest Kobalt als Gußlegierung in der Dentaltechnik eingesetzt. Diesen Legierungen fehlt jedoch der Eisengehalt der erfindungsgemäßen Legierung und damit die für eine gute Kaltverformbarkeit erforderlich Austenitstabilität.Rest of cobalt and the usual manufacturing-related impurities can be achieved. This alloy has excellent corrosion resistance and good formability and is non-magnetic. Furthermore, it can be easily cast into complicated shapes and, if necessary, further processed. The object of the invention is achieved in provided that it is surprising that it has been found that this alloy is in principle a cobalt-chromium-molybdenum-nickel alloy in which the nickel, which essentially brings about the austenite stability, can be replaced by iron and titanium and / or niobium. This is surprising insofar as titanium shows an austenite-destabilizing effect in places with niobium. In principle, cobalt-chromium-molybdenum-titanium alloys have long been known. For example, the alloy "Dentitan" with 24% by weight chromium, 4% by weight molybdenum, 2.5% by weight titanium, the rest cobalt is used as a casting alloy in dental technology. However, these alloys lack the iron content of the alloy according to the invention and thus the austenite stability required for good cold formability.
Die besten Ergebnisse werden erzielt, wenn die Legierung ausThe best results are achieved when the alloy is made
12 - 15 % Chrom 5 - 7 % Molybdän + H Wolfram12 - 15% chromium 5 - 7% molybdenum + H tungsten
4,5 - 5,5 % (Titan und/oder 10 - 15 % Eisen4.5 - 5.5% (titanium and / or 10 - 15% iron
Niob)Niobium)
0 - 1,5 % Mangan 0 - 0,5 % Silizium0 - 1.5% manganese 0 - 0.5% silicon
0 - 1,5 % Aluminium 0 - 0,05 % (Kohlenstoff +0 - 1.5% aluminum 0 - 0.05% (carbon +
Stickstoffnitrogen
0 - 1 % Kupfer0 - 1% copper
Rest Kobalt und herstellungsbedingten Verunreinigungen besteht .Rest of cobalt and manufacturing-related impurities.
Für den vorgesehenen Zweck als Knetlegierung müssen die Le- gierungselemente geeignet abgestimmt sein. Es wurde gefunden, daß die Gehalte an Chrom + Molybdän + XA Wolfram + Titan/Niob maximal 28 Gew.-% betragen dürfen, wobei der Gehalt an Ti- tan/Niob im Bereich von 4 bis 6 Gew.-%, der Gehalt an Chrom im Bereich 10 bis 20 Gew.-%, der Gehalt an Molybdän + xλ Wolfram im Bereich 4 bis 8 Gew.-% liegen muß. Die angegebenen Bereiche von Chrom und Molybdän/Wolfram sind notwendig, um eine hohe Korrosionsbeständigkeit zu erreichen, während die ange- gebenen Gehalte von Titan bzw. Niob die Einstellung eines einphasigen austenitischen Gefüges bewirken. Nur in diesem Gefügezustand wird die gewünschte gute Kalt- und Warmverformbarkeit gewährleistet .The alloying elements must be suitably matched for the intended purpose as wrought alloy. It was found that the chromium + molybdenum + X A tungsten + titanium / niobium content may not exceed 28% by weight, the titanium / niobium content being in the range from 4 to 6% by weight, the content of chromium in the range 10 to 20 wt .-%, the content of molybdenum + x λ tungsten must be in the range 4 to 8 wt .-%. The specified ranges of chromium and molybdenum / tungsten are necessary in order to achieve a high level of corrosion resistance, while the stated contents of titanium or niobium are the setting of a single-phase austenitic structure. The desired good cold and hot formability is only guaranteed in this structural state.
Übersteigt der Gehalt an Chrom + Molybdän + A Wolfram + Ti- tan/Niob 28 Gew.-%, ist die Gefügestruktur der erzielten Legierung in der Mehrheit hexagonal und die gute Kaltverformbarkeit ist nicht mehr gegeben. Die so erzielten Legierungen sind duktil, weisen eine hervorragende Korrosion'sbeständig- keit gegen Gewebe- und Körperflüssigkeiten auf und lassen sich leicht zu komplizierten Formen vergießen und weiterverarbeiten, wie z.B. Brillengestelle, so daß sich diese Legierung neben der Verwendung als Werkstoff in der Schmuck- und Brillenindustrie auch als Werkstoff für Zahnprotesen und all- gemein chirurgische Implantate im besonderen Maße eignet.If the content of chromium + molybdenum + A tungsten + titanium / niobium exceeds 28% by weight, the structure of the alloy obtained is mostly hexagonal and the good cold formability is no longer given. The alloys thus obtained are ductile, have excellent corrosion 'sbeständig- ness against tissue and body fluids and can be easily cast into complex shapes and further processed, such as eyeglass frames, so that this alloy in addition to the use as a material in the jewelry and the eyewear industry is also particularly suitable as a material for dental prostheses and general surgical implants.
Die Erfindung wird nachfolgend anhand von einem Ausführungs- beispiel näher erläutert:The invention is explained in more detail below on the basis of an exemplary embodiment:
Eine Legierung mit der Zusammensetzung 12 Gew.-% Eisen, 12 Gew.-% Chrom, 4 Gew.-% Molybdän, 4 Gew.-% Wolfram sowie 5 Gew.-% Titan, Restkobalt wird unter Vakuum in einem Hochfrequenzofen erschmolzen und bei 1150°C zu Stäben mit einem Durchmesser von 7 mm warm verformt. Daraufhin wurden die ge- wonnenen Stäbe eine Stunde lang bei 100°C homogenisiert und auf einen Durchmesser von 3 , 5 mm kaltgezogen.An alloy with the composition 12% by weight of iron, 12% by weight of chromium, 4% by weight of molybdenum, 4% by weight of tungsten and 5% by weight of titanium, residual cobalt is melted under vacuum in a high-frequency furnace and at 1150 ° C hot-formed into bars with a diameter of 7 mm. The rods obtained were then homogenized at 100 ° C. for one hour and cold drawn to a diameter of 3.5 mm.
Es ergaben sich folgende mechanische Eigenschaften:The mechanical properties were as follows:
Eine Härte im weichen Zustand: 350 HVHardness in soft condition: 350 HV
Eine Härte im 75%ig kaltverformte Zustand: 490 HV Zugfestigkeit 75 % kaltverformt : 1900 MPa Streckgrenze 75 % kaltverformt : 1370 MPas Dehnung 75 % kaltverformt : 1,5 %A hardness in the 75% cold worked condition: 490 HV tensile strength 75% cold worked: 1900 MPa yield strength 75% cold worked: 1370 MPas elongation 75% cold worked: 1.5%
Darüber hinaus wurde gefunden, daß die mechanischen Eigenschaften durch eine Wärmebehandlung im Bereich von 450 bis 750°C und einer Dauer von 0,5 bis 12 Stunden weiter gesteigert werden können.In addition, it was found that the mechanical properties by a heat treatment in the range of 450 to 750 ° C and a duration of 0.5 to 12 hours can be further increased.
Härte im weichen Zustand ausgehärtet (2 Std./500°C): 380 HV Härte 75 % kaltverformt ausgehärtet (2 Std./500°C): 650 HV. Hardness in the soft state hardened (2 hours / 500 ° C): 380 HV hardness 75% cold-formed hardened (2 hours / 500 ° C): 650 HV.

Claims

Patentansprüche claims
1. Nickelfreie, austenitische Kobaltbasislegierung mit hoher Korrosionsbeständigkeit und guter Kaltverformbarkeit, d a d u r c h g e k e n n z e i c h n e t , daß sie aus1. Nickel-free, austenitic cobalt-based alloy with high corrosion resistance and good cold formability, which means that they are made from
10 - 18 % Chrom 4 - 8 % (Molybdän + XΛ Wolfram)10 - 18% chromium 4 - 8% (molybdenum + X Λ tungsten)
4 - 6 % (Titan und/oder Niob) 5 - 20 % Eisen4 - 6% (titanium and / or niobium) 5 - 20% iron
0 - 3 % Mangan 0 - 1 % Silizium0 - 3% manganese 0 - 1% silicon
0 - 3 % Aluminium 0 - 0,1 % (Kohlenstoff +0 - 3% aluminum 0 - 0.1% (carbon +
Stickstoff) 0 - 2 % KupferNitrogen) 0 - 2% copper
Rest Kobalt und den üblichen herstellungsbedingten Verunreinigungen erreicht werden kann.Rest of cobalt and the usual manufacturing-related impurities can be achieved.
2. Nickelfreie, austenitische Kobaltbasislegierung mit hoher Korrosionsbeständigkeit und guter Kaltverformbarkeit, d a d u r c h g e k e n n z e i c h n e t , daß sie aus 12 - 15 % Chrom 5 - 7 % Molybdän + V2 Wolfram2. Nickel-free, austenitic cobalt-based alloy with high corrosion resistance and good cold formability, due to the fact that it consists of 12 - 15% chromium 5 - 7% molybdenum + V2 tungsten
4,5 - 5,5 % (Titan und/oder 10 - 15 % Eisen Niob)4.5 - 5.5% (titanium and / or 10 - 15% iron niobium)
0 - 1,5 % Mangan 0 - 0,5 % Silizium0 - 1.5% manganese 0 - 0.5% silicon
0 - 1,5 % Aluminium 0 - 0,05 % (Kohlenstoff +0 - 1.5% aluminum 0 - 0.05% (carbon +
Stickstoff 0 - 1 % Kupfer Restkobalt und herstellungsbedingte Verunreinigungen besteht.Nitrogen 0-1% copper residual cobalt and manufacturing-related impurities exist.
3. Legierung nach Anspruch 1 oder 2 , d a d u r c h g e k e n n z e i c h n e t , daß die Legierung nach Glühen bei Temperaturen oberhalb 1000°C und Abschrecken auf Raumtemperatur austenitisches Gefüge aufweist.3. Alloy according to claim 1 or 2, that the alloy has an austenitic structure after annealing at temperatures above 1000 ° C and quenching to room temperature.
4. Verwendung einer Legierung nach einem der Ansprüche 1 bis 3 als Werkstoff für medizinische Implantate.4. Use of an alloy according to one of claims 1 to 3 as a material for medical implants.
5. Verwendung einer Legierung nach einem der Ansprüche 1 bis 3 als Werkstoff für Armbanduhren. Verwendung einer Legierung nach einem der Ansprüche 1 bis als Schmuckmetall. 5. Use of an alloy according to one of claims 1 to 3 as a material for wristwatches. Use of an alloy according to one of claims 1 to as a decorative metal.
PCT/DE1998/000296 1997-02-06 1998-02-03 Nickel-free austenitic cobalt-based alloy WO1998035067A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP53355298A JP2001512529A (en) 1997-02-06 1998-02-03 Nickel-free austenitic cobalt-based alloy
EP98909320A EP0963453A1 (en) 1997-02-06 1998-02-03 Nickel-free austenitic cobalt-based alloy

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19704530.8 1997-02-06
DE1997104530 DE19704530C2 (en) 1997-02-06 1997-02-06 Use of a nickel-free, austenitic cobalt-based alloy

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EP2676686A1 (en) * 2012-06-18 2013-12-25 Biotronik AG Stent made of a cobalt alloy
US8927002B2 (en) 2008-06-17 2015-01-06 Biotronik Vi Patent Ag Stent with a coating or a basic body containing a lithium salt and use of lithium salts for prevention of restenosis
EP2757423B1 (en) 2013-01-17 2018-07-11 Omega SA Part for clockwork
CN108601859A (en) * 2016-02-03 2018-09-28 德国不锈钢特钢有限及两合公司 The method that precipitation-hardening or mixed crystal are strengthened, produce implantation material or prosthese after the application of the cobalt-base alloys of bio-compatible and material removal

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US7794493B2 (en) * 2004-06-30 2010-09-14 Cordis Corporation Magnetic resonance imaging compatibility alloy for implantable medical devices
WO2006054358A1 (en) * 2004-11-19 2006-05-26 Iwate University METHOD FOR RENDERING ALLERGY TOXICITY DERIVED FROM Ni TRACE IMPURITY IN BIO-ALLOY UNHARMFUL
JP5239005B2 (en) * 2004-11-19 2013-07-17 国立大学法人岩手大学 Bio-Co-Cr-Mo alloy for suppressing ion elution by tissue control and method for producing the same
EP2676684B1 (en) 2012-06-18 2015-01-07 Biotronik AG Cobalt alloy for medical implants and stent comprising the alloy

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DE3624377A1 (en) * 1986-07-18 1988-01-28 Vacuumschmelze Gmbh Use of a corrosion-resistant, nickel-free cobalt-chromium alloy
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8927002B2 (en) 2008-06-17 2015-01-06 Biotronik Vi Patent Ag Stent with a coating or a basic body containing a lithium salt and use of lithium salts for prevention of restenosis
EP2676686A1 (en) * 2012-06-18 2013-12-25 Biotronik AG Stent made of a cobalt alloy
EP2757423B1 (en) 2013-01-17 2018-07-11 Omega SA Part for clockwork
CN108601859A (en) * 2016-02-03 2018-09-28 德国不锈钢特钢有限及两合公司 The method that precipitation-hardening or mixed crystal are strengthened, produce implantation material or prosthese after the application of the cobalt-base alloys of bio-compatible and material removal

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EP0963453A1 (en) 1999-12-15
DE19704530A1 (en) 1998-08-13
JP2001512529A (en) 2001-08-21

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