EP3901298A1 - Manganese and aluminium-containing copper-zinc alloy - Google Patents
Manganese and aluminium-containing copper-zinc alloy Download PDFInfo
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- EP3901298A1 EP3901298A1 EP21000097.2A EP21000097A EP3901298A1 EP 3901298 A1 EP3901298 A1 EP 3901298A1 EP 21000097 A EP21000097 A EP 21000097A EP 3901298 A1 EP3901298 A1 EP 3901298A1
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- copper
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
- C22C30/02—Alloys containing less than 50% by weight of each constituent containing copper
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
- C22C30/06—Alloys containing less than 50% by weight of each constituent containing zinc
Definitions
- the invention relates to a manganese and aluminum-containing copper-zinc alloy.
- Cu-Zn-Al and Cu-Al-Mn alloys are known from the prior art, e.g. as shape memory alloys or Heusler alloys.
- Cu-Al-Mn alloys usually have higher strengths than Cu-Zn-Al alloys.
- Cu-Al-Mn alloys with high manganese contents but low Al contents can be hot-worked well, but their tensile and compressive strength is limited to 800 to 1000 MPa.
- High Al contents in Cu-Al-Mn alloys lead to high compressive strengths of over 1500 MPa, but also to a deterioration in hot formability, so that these alloys can only be hot formed with great effort.
- Quaternary Cu-Zn-Mn-Al alloys are less well known. With Mn and Al proportions of less than 10% by weight each, quaternary Cu-Zn-Mn-Al alloys are limited in terms of strength, hardness and wear resistance.
- CuZn23Mn6Al6 has a hardness of 262 HV0.1 in the as-cast state.
- CuZn23Mn10Al8 achieves a tensile and compressive strength of approx. 660 MPa and a hardness of 466 HV0.1 in the hot-rolled and aged condition.
- the invention is based on the object of providing an inexpensive, light and very wear-resistant alloy with high hardness. Furthermore, the alloy should be hot-workable.
- the invention includes a copper-zinc alloy having the following composition in% by weight: Zn: 25.0 to 32.0% Mn: 20.0 to 27.0% Al: 11.0 to 14.0% optional Fe: 0.05 to 5.0% optional Cr: 0.02 to 2.0% optional Ni: 0.02 to 2.0% optional Ti: 0.01 to 0.5% optional B: 0.002 to 0.15% optional C: 0.001 to 0.1% optional Ca: 0.01 to 0.1%
- the zinc content In order to obtain a copper alloy with a hardness of 780 HV0.1 with a low density at the same time, the zinc content must be at least 25% by weight, the manganese content at least 20% by weight and the aluminum content at least 11% by weight.
- the density of the copper alloy is a maximum of 6500 kg / m 3 , typically 6250 kg / m 3 . So that the alloy can still be hot-formed by extrusion, the zinc content must not be greater than 32% by weight, the manganese content not greater than 27% by weight and the aluminum content not greater than 14% by weight .
- the hot forming takes place at a temperature between 700 and 800 ° C. In this temperature range, the alloy has a single-phase, body-centered cubic crystal structure. This crystal structure allows a process-reliable hot forming at a moderate forming speed in the temperature range mentioned.
- the alloy has many special properties. It reaches a Vickers hardness of up to 790 HV0.1. This corresponds to over 63 HRC (Rockwell hardness). This great hardness of the material results in a high level of wear resistance.
- the alloy is also characterized by a very high compressive strength of approximately 1600 MPa. This is roughly twice the compressive strength of cast iron. The 0.2% compression limit is 1500 MPa, the tensile strength is around 250 MPa.
- the alloy has a modulus of elasticity of approximately 185 GPa, which corresponds to the level of Cr-Ni stainless steel. Materials made from this alloy are ferromagnetic, so that magnetic holders can be attached to components made from such materials.
- the optional alloying elements Fe, Cr, Ni, Ti, B, C and Ca effect a grain refinement of the alloy.
- the Zn content can be at least 28.0% by weight.
- An increase in the zinc content at the expense of the copper content makes the alloy cheaper.
- Zinc like manganese, reduces the density of the alloy, albeit to a lesser extent than aluminum. Zinc also improves hot formability.
- the Mn content can advantageously be at least 23.0% by weight.
- Manganese stabilizes the body-centered cubic crystal structure. This improves the hot formability. Manganese also reduces the price of the alloy and its density.
- the Al fraction can be at least 12.0% by weight.
- a high Al content leads to a reduction in the density of the alloy.
- Al also has a particularly strong strengthening effect, which is considerably higher than the effect of manganese.
- CuZnMnAl alloys therefore have considerably higher strengths than, for example, CuZnMn alloys.
- the Al proportion of the alloy can advantageously be selected so that it is not greater than a quarter of the sum of the proportions of Zn and Mn.
- the alloys selected in this way are characterized by a particularly advantageous combination of strength, hardness, density and hot formability.
- the Zn content can be 30.0 to 31.5% by weight, the Mn content 25.0 to 26.5% by weight and the Al content 12.0 to 13, 5% by weight.
- This composition of the alloy results in particularly favorable properties with regard to wear resistance, density, costs and hot formability.
- the copper-zinc alloy in the cast state at room temperature can have a structure that consists of a Cu-Zn-rich ⁇ phase, a cubic mixed crystal phase in the structure of ⁇ -manganese, an Al-Cu-rich ⁇ Phase and an Al 8 Mn 5 phase.
- a structure changes at temperatures between 700 and 800 ° C into a single-phase structure that only consists of a body-centered cubic ⁇ -mixed crystal phase consists.
- This single-phase structure can be hot-formed sufficiently well at low to moderate forming speeds, in particular it can be extruded.
- the Cu-Zn-rich ⁇ phase can preferably have a volume fraction of approximately 40%.
- the copper-zinc alloy can advantageously be used for the production of semifinished products, the semifinished product being hot-formed, that is to say has been subjected to a hot-forming step.
- the hot forming can in particular be an extrusion.
- the copper-zinc alloy can also be used to coat a component.
- the coating can be applied, for example, by thermal spraying. Since the alloy is particularly characterized by high wear resistance, tools and sliding elements in particular come into consideration as components.
- a material was produced from an alloy with the composition CuZn31 Mn26Al13 as follows: The alloy was melted in a Tammann furnace using the binary copper master alloys CuZn, CuMn and CuAl. The melt was covered with graphite. The alloy was cast in the form of a bolt.
- Comparative materials in the as-cast state with a composition according to Table 1 were produced in the same way.
- Table 1 documents the hardness values measured on the materials.
- Table 1 Material variants and hardness values material Hardness HV0.1 CuZn31Mn26Al13 790 CuZn23 Mn6Al6 (comparison material) 262 CuZn23Mn10Al8 (comparison material) 466 CuZn31 Mn10Al8 (comparison material) 576 CuZn31 Mn26Al8 (comparison material) 665
- Table 1 documents the extraordinarily high hardness of the material CuZn31Mn26Al13. Compared to the material CuZn31 Mn26Al8, it has a 19% greater hardness. At the same time, it can still be hot-formed: the cast billet can be heated in a furnace with gas convection and then extruded through a conical die at a moderate pressing speed. The ratio between the cross-sectional area of the bolt and the cross-sectional area of the extruded product is in the range of 5 to 10.
Abstract
Die Erfindung betrifft eine Kupfer-Zink-Legierung mit folgender Zusammensetzung in Gew.-%:Rest Cu sowie unvermeidbare Verunreinigungen.The invention relates to a copper-zinc alloy with the following composition in% by weight: remainder Cu and unavoidable impurities.
Description
Die Erfindung betrifft eine mangan- und aluminiumhaltige Kupfer-Zink-Legierung.The invention relates to a manganese and aluminum-containing copper-zinc alloy.
Cu-Zn-Al und Cu-Al-Mn-Legierungen sind aus dem Stand der Technik bekannt, z.B. als Form-Gedächtnis-Legierungen (Shape-Memory-Legierungen) oder Heusler-Legierungen. Hierbei weisen Cu-Al-Mn-Legierungen in der Regel höhere Festigkeiten als Cu-Zn-Al-Legierungen auf. Cu-Al-Mn-Legierungen mit hohen Mangangehalten, aber geringen Al-Gehalten sind gut warmumformbar, ihre Zug- und Druckfestigkeit ist jedoch auf 800 bis 1000 MPa beschränkt. CuMn31Al6 weist beispielsweise eine Zug- und Druckfestigkeit von 800 MPa auf. Hohe Al-Gehalte in Cu-Al-Mn-Legierungen führen zwar zu hohen Druckfestigkeiten von über 1500 MPa, aber auch zu einer Verschlechterung der Warmumformbarkeit, so dass diese Legierungen nur unter großem Aufwand warmumformbar sind.Cu-Zn-Al and Cu-Al-Mn alloys are known from the prior art, e.g. as shape memory alloys or Heusler alloys. Here, Cu-Al-Mn alloys usually have higher strengths than Cu-Zn-Al alloys. Cu-Al-Mn alloys with high manganese contents but low Al contents can be hot-worked well, but their tensile and compressive strength is limited to 800 to 1000 MPa. CuMn31Al6, for example, has a tensile and compressive strength of 800 MPa. High Al contents in Cu-Al-Mn alloys lead to high compressive strengths of over 1500 MPa, but also to a deterioration in hot formability, so that these alloys can only be hot formed with great effort.
Quaternäre Cu-Zn-Mn-Al-Legierungen sind weniger bekannt. Bei Mn-und Al-Anteilen von jeweils unter 10 Gew.-% sind quaternäre Cu-Zn-Mn-Al-Legierungen in der Festigkeit, Härte und Verschleißbeständigkeit beschränkt. CuZn23Mn6Al6 weist im Gusszustand eine Härte von 262 HV0.1 auf. CuZn23Mn10Al8 erreicht im warmgewalzten und ausgelagerten Zustand eine Zug- und Druckfestigkeit von ca. 660 MPa und eine Härte von 466 HV0.1.Quaternary Cu-Zn-Mn-Al alloys are less well known. With Mn and Al proportions of less than 10% by weight each, quaternary Cu-Zn-Mn-Al alloys are limited in terms of strength, hardness and wear resistance. CuZn23Mn6Al6 has a hardness of 262 HV0.1 in the as-cast state. CuZn23Mn10Al8 achieves a tensile and compressive strength of approx. 660 MPa and a hardness of 466 HV0.1 in the hot-rolled and aged condition.
Aus der Druckschrift
Der Erfindung liegt die Aufgabe zugrunde, eine kostengünstige, leichte und sehr verschleißbeständige Legierung mit hoher Härte bereitzustellen. Ferner soll die Legierung warmumformbar sein.The invention is based on the object of providing an inexpensive, light and very wear-resistant alloy with high hardness. Furthermore, the alloy should be hot-workable.
Die Erfindung wird durch die Merkmale des Anspruchs 1 wiedergegeben. Die weiteren rückbezogenen Ansprüche betreffen vorteilhafte Aus- und Weiterbildungen der Erfindung.The invention is represented by the features of claim 1. The further back-referenced claims relate to advantageous designs and developments of the invention.
Die Erfindung schließt eine Kupfer-Zink-Legierung mit folgender Zusammensetzung in Gew.-% ein:
Rest Cu sowie unvermeidbare Verunreinigungen.Remainder Cu and unavoidable impurities.
Um eine Kupferlegierung mit einer Härte von 780 HV0.1 bei gleichzeitig geringer Dichte zu erhalten, muss der Zink-Anteil mindestens 25 Gew.-%, der Mangan-Anteil mindestens 20 Gew.-% und der Aluminium-Anteil mindestens 11 Gew.-% betragen. Die Dichte der Kupferlegierung liegt bei maximal 6500 kg/m3, typischerweise bei 6250 kg/m3. Damit die Legierung noch mittels Strangpressen warmumgeformt werden kann, darf der Zink-Anteil nicht größer als 32 Gew.-%, der Mangan-Anteil nicht größer als 27 Gew.-% und der Aluminium-Anteil nicht größer als 14 Gew.-% sein. Das Warmumformen findet bei einer Temperatur zwischen 700 und 800 °C statt. In diesem Temperaturbereich weist die Legierung eine einphasige, kubisch-raumzentrierte Kristallstruktur auf. Diese Kristallstruktur erlaubt in dem genannten Temperaturbereich ein prozesssicheres Warmumformen bei moderater Umformgeschwindigkeit.In order to obtain a copper alloy with a hardness of 780 HV0.1 with a low density at the same time, the zinc content must be at least 25% by weight, the manganese content at least 20% by weight and the aluminum content at least 11% by weight. The density of the copper alloy is a maximum of 6500 kg / m 3 , typically 6250 kg / m 3 . So that the alloy can still be hot-formed by extrusion, the zinc content must not be greater than 32% by weight, the manganese content not greater than 27% by weight and the aluminum content not greater than 14% by weight . The hot forming takes place at a temperature between 700 and 800 ° C. In this temperature range, the alloy has a single-phase, body-centered cubic crystal structure. This crystal structure allows a process-reliable hot forming at a moderate forming speed in the temperature range mentioned.
Die Legierung weist viele besondere Eigenschaften auf. Sie erreicht eine Vickers-Härte von bis zu 790 HV0.1. Dies entspricht über 63 HRC (Härte Rockwell). Diese große Härte des Materials hat eine hohe Verschleißbeständigkeit zur Folge. Die Legierung zeichnet sich ferner durch eine sehr hohe Druckfestigkeit von ungefähr 1600 MPa aus. Dies ist ungefähr doppelt so viel wie die Druckfestigkeit von Gusseisen. Die 0,2 %-Stauchgrenze liegt bei 1500 MPa, die Zugfestigkeit bei ungefähr 250 MPa. Die Legierung besitzt ein E-Modul von ungefähr 185 GPa, was dem Niveau von Cr-Ni-Edelstahl entspricht. Werkstoffe aus dieser Legierung sind ferromagnetisch, so dass sich magnetische Halterungen an Bauteilen aus solchen Werkstoffen befestigen lassen.The alloy has many special properties. It reaches a Vickers hardness of up to 790 HV0.1. This corresponds to over 63 HRC (Rockwell hardness). This great hardness of the material results in a high level of wear resistance. The alloy is also characterized by a very high compressive strength of approximately 1600 MPa. This is roughly twice the compressive strength of cast iron. The 0.2% compression limit is 1500 MPa, the tensile strength is around 250 MPa. The alloy has a modulus of elasticity of approximately 185 GPa, which corresponds to the level of Cr-Ni stainless steel. Materials made from this alloy are ferromagnetic, so that magnetic holders can be attached to components made from such materials.
Die optionalen Legierungselemente Fe, Cr, Ni, Ti, B, C und Ca bewirken eine Kornfeinung der Legierung.The optional alloying elements Fe, Cr, Ni, Ti, B, C and Ca effect a grain refinement of the alloy.
In bevorzugter Ausgestaltung der Erfindung kann der Zn-Anteil mindestens 28,0 Gew.-% betragen. Eine Erhöhung des Zink-Anteils auf Kosten des Kupfer-Anteils macht die Legierung günstiger. Zink reduziert, ebenso wie Mangan, die Dichte der Legierung, wenn auch in geringerem Maße als Aluminium. Zink verbessert auch die Warmumformbarkeit.In a preferred embodiment of the invention, the Zn content can be at least 28.0% by weight. An increase in the zinc content at the expense of the copper content makes the alloy cheaper. Zinc, like manganese, reduces the density of the alloy, albeit to a lesser extent than aluminum. Zinc also improves hot formability.
Vorteilhafterweise kann der Mn-Anteil mindestens 23,0 Gew.-% betragen. Mangan stabilisiert die kubisch-raumzentrierte Kristallstruktur. Hierdurch wird die Warmumformbarkeit verbessert. Mangan vermindert zudem den Preis der Legierung und deren Dichte.The Mn content can advantageously be at least 23.0% by weight. Manganese stabilizes the body-centered cubic crystal structure. This improves the hot formability. Manganese also reduces the price of the alloy and its density.
Ferner kann in einer bevorzugten Ausgestaltung der Erfindung der Al-Anteil mindestens 12,0 Gew.-% betragen. Ein hoher AI-Anteil führt zu einer Reduzierung der Dichte der Legierung. Al hat zudem eine besonders stark festigkeitssteigernde Wirkung, welche erheblich höher ist als der Effekt durch Mangan. CuZnMnAl-Legierungen haben deshalb erheblich höhere Festigkeiten als beispielsweise CuZnMn-Legierungen.Furthermore, in a preferred embodiment of the invention, the Al fraction can be at least 12.0% by weight. A high Al content leads to a reduction in the density of the alloy. Al also has a particularly strong strengthening effect, which is considerably higher than the effect of manganese. CuZnMnAl alloys therefore have considerably higher strengths than, for example, CuZnMn alloys.
Vorteilhafterweise kann der Al-Anteil der Legierung so gewählt werden, dass er nicht größer als ein Viertel der Summe der Anteile von Zn und Mn ist. Die so ausgewählten Legierungen zeichnen sich durch eine besonders vorteilhafte Kombination von Festigkeit, Härte, Dichte und Warmumformbarkeit aus.The Al proportion of the alloy can advantageously be selected so that it is not greater than a quarter of the sum of the proportions of Zn and Mn. The alloys selected in this way are characterized by a particularly advantageous combination of strength, hardness, density and hot formability.
Bei einer besonders vorteilhaften Ausführungsform der Erfindung können der Zn-Anteil 30,0 bis 31,5 Gew.-%, der Mn-Anteil 25,0 bis 26,5 Gew.-% und der Al-Anteil 12,0 bis 13,5 Gew.-% betragen. Bei dieser Zusammensetzung der Legierung ergeben sich besonders günstige Eigenschaften im Hinblick auf Verschleißbeständigkeit, Dichte, Kosten und Warmumformbarkeit.In a particularly advantageous embodiment of the invention, the Zn content can be 30.0 to 31.5% by weight, the Mn content 25.0 to 26.5% by weight and the Al content 12.0 to 13, 5% by weight. This composition of the alloy results in particularly favorable properties with regard to wear resistance, density, costs and hot formability.
In vorteilhafter Ausgestaltung der Erfindung kann die Kupfer-Zink-Legierung im Gusszustand bei Raumtemperatur ein Gefüge aufweisen, das aus einer Cu-Zn-reichen γ-Phase, einer kubischen Mischkristallphase in der Struktur des β-Mangans, einer Al-Cu-reichen δ-Phase und einer Al8Mn5-Phase besteht. Ein solches Gefüge wandelt sich bei Temperaturen zwischen 700 und 800 °C in ein einphasiges Gefüge um, das nur aus einer kubisch-raumzentrierten β-Mischkristallphase besteht. Dieses einphasige Gefüge ist bei niedrigen bis moderaten Umformgeschwindigkeiten hinreichend gut warmumformbar, insbesondere strangpressbar. Bevorzugt kann die Cu-Zn-reiche γ-Phase einen Volumen-Anteil von ungefähr 40 % aufweisen.In an advantageous embodiment of the invention, the copper-zinc alloy in the cast state at room temperature can have a structure that consists of a Cu-Zn-rich γ phase, a cubic mixed crystal phase in the structure of β-manganese, an Al-Cu-rich δ Phase and an Al 8 Mn 5 phase. Such a structure changes at temperatures between 700 and 800 ° C into a single-phase structure that only consists of a body-centered cubic β-mixed crystal phase consists. This single-phase structure can be hot-formed sufficiently well at low to moderate forming speeds, in particular it can be extruded. The Cu-Zn-rich γ phase can preferably have a volume fraction of approximately 40%.
Die Kupfer-Zink-Legierung kann vorteilhafterweise zur Herstellung von Halbzeug verwendet werden, wobei das Halbzeug warmumgeformt ist, also einem Warmumformschritt unterzogen wurde. Die Warmumformung kann insbesondere ein Strangpressen sein.The copper-zinc alloy can advantageously be used for the production of semifinished products, the semifinished product being hot-formed, that is to say has been subjected to a hot-forming step. The hot forming can in particular be an extrusion.
Alternativ kann die Kupfer-Zink-Legierung auch zur Beschichtung eines Bauteils verwendet werden. Die Beschichtung kann beispielsweise durch thermisches Spritzen aufgebracht werden. Da sich die Legierung insbesondere durch eine hohe Verschleißbeständigkeit auszeichnet, kommen als Bauteile insbesondere Werkzeuge und Gleitelemente in Betracht.Alternatively, the copper-zinc alloy can also be used to coat a component. The coating can be applied, for example, by thermal spraying. Since the alloy is particularly characterized by high wear resistance, tools and sliding elements in particular come into consideration as components.
Die Erfindung wird anhand eines Ausführungsbeispiels näher erläutert.The invention is explained in more detail using an exemplary embodiment.
Es wurde ein Werkstoff aus einer Legierung mit der Zusammensetzung CuZn31 Mn26Al13 wie folgt hergestellt: Die Legierung wurde in einem Tammann-Ofen unter Verwendung der binären Kupfer-Vorlegierungen CuZn, CuMn und CuAl erschmolzen. Die Schmelze wurde mit Graphit abgedeckt. Die Legierung wurde in Form eines Bolzens abgegossen.A material was produced from an alloy with the composition CuZn31 Mn26Al13 as follows: The alloy was melted in a Tammann furnace using the binary copper master alloys CuZn, CuMn and CuAl. The melt was covered with graphite. The alloy was cast in the form of a bolt.
In gleicher Weise wurden Vergleichswerkstoffe im Gusszustand mit einer Zusammensetzung gemäß Tabelle 1 hergestellt. Tabelle 1 dokumentiert die an den Werkstoffen gemessenen Härtewerte.
Tabelle 1 dokumentiert die außergewöhnlich große Härte des Werkstoffs CuZn31Mn26Al13. Gegenüber dem Werkstoff CuZn31 Mn26Al8 weist er eine um 19 % größere Härte auf. Gleichzeitig ist er noch warmumformbar: Der gegossene Bolzen kann in einem Ofen mit Gaskonvektion aufgeheizt und anschließend mit moderater Pressgeschwindigkeit durch eine konische Matrize extrudiert werden. Das Verhältnis zwischen der Querschnittsfläche des Bolzens und Querschnittsfläche des extrudierten Produkts liegt im Bereich von 5 bis 10.Table 1 documents the extraordinarily high hardness of the material CuZn31Mn26Al13. Compared to the material CuZn31 Mn26Al8, it has a 19% greater hardness. At the same time, it can still be hot-formed: the cast billet can be heated in a furnace with gas convection and then extruded through a conical die at a moderate pressing speed. The ratio between the cross-sectional area of the bolt and the cross-sectional area of the extruded product is in the range of 5 to 10.
Die große Härte des Werkstoffs CuZn31Mn26Al13 führt zu herausragenden Verschleißeigenschaften. Dies wurde in einem tribologischen Dauerlauftest, der unter Verwendung eines Scheibe-Platte-Tribometers durchgeführt wurde, bestätigt. Bei der aus CuZn31Mn26Al13 hergestellten Probe wurde nahezu keine verschleißbedingte Gewichtsabnahme am Probenkörper festgestellt während an Vergleichsproben aus typischen Werkstoffen für Gleitelemente signifikante Gewichtsabnahmen festgestellt wurden.The great hardness of the material CuZn31Mn26Al13 leads to excellent wear properties. This was confirmed in a tribological endurance test carried out using a disc-and-plate tribometer. In the case of the sample made of CuZn31Mn26Al13, almost no wear-related decrease in weight was found on the specimen, while significant weight decreases were found on comparative samples made of typical materials for sliding elements.
Claims (9)
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| DE102020002524.2A DE102020002524A1 (en) | 2020-04-25 | 2020-04-25 | Manganese and aluminum-containing copper-zinc alloy |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4166739A (en) | 1976-03-18 | 1979-09-04 | Raychem Corporation | Quarternary β-brass type alloys capable of being rendered heat recoverable |
| JPH03264630A (en) * | 1990-03-14 | 1991-11-25 | Furukawa Electric Co Ltd:The | Copper alloy for connector and terminal |
| EP0911419A1 (en) * | 1997-10-21 | 1999-04-28 | Ykk Corporation | Nickel-free copper alloy |
| EP3212815A1 (en) * | 2014-10-28 | 2017-09-06 | Advanced Alloy Holdings PTY Ltd | Metal alloys including copper |
| CN109338202A (en) * | 2018-11-23 | 2019-02-15 | 中国科学院兰州化学物理研究所 | A kind of high entropy copper alloy of high toughness wear resistant |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19801074C2 (en) | 1998-01-14 | 2002-01-31 | Federal Mogul Wiesbaden Gmbh | Process for the production of a layer composite material for sliding elements |
| DE10159949C1 (en) | 2001-12-06 | 2003-05-22 | Wieland Werke Ag | Use of a copper-aluminum alloy as bearing material in the manufacture of wear resistant sliding bearings used in the car industry |
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2020
- 2020-04-25 DE DE102020002524.2A patent/DE102020002524A1/en active Pending
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4166739A (en) | 1976-03-18 | 1979-09-04 | Raychem Corporation | Quarternary β-brass type alloys capable of being rendered heat recoverable |
| JPH03264630A (en) * | 1990-03-14 | 1991-11-25 | Furukawa Electric Co Ltd:The | Copper alloy for connector and terminal |
| EP0911419A1 (en) * | 1997-10-21 | 1999-04-28 | Ykk Corporation | Nickel-free copper alloy |
| EP3212815A1 (en) * | 2014-10-28 | 2017-09-06 | Advanced Alloy Holdings PTY Ltd | Metal alloys including copper |
| CN109338202A (en) * | 2018-11-23 | 2019-02-15 | 中国科学院兰州化学物理研究所 | A kind of high entropy copper alloy of high toughness wear resistant |
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