EP2906733B1 - Material for electric contact components - Google Patents

Material for electric contact components Download PDF

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Publication number
EP2906733B1
EP2906733B1 EP12780079.5A EP12780079A EP2906733B1 EP 2906733 B1 EP2906733 B1 EP 2906733B1 EP 12780079 A EP12780079 A EP 12780079A EP 2906733 B1 EP2906733 B1 EP 2906733B1
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Prior art keywords
nickel
metal strip
silicon
cobalt
proportion
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German (de)
French (fr)
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EP2906733A1 (en
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Dirk Rode
Thomas Helmenkamp
Hark Schulze
Albert Rumbach
Johann JÜSTEN
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KME Special Products GmbH and Co KG
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KME Germany GmbH
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C9/00—Alloys based on copper
    • C22C9/04—Alloys based on copper with zinc as the next major constituent

Definitions

  • the invention relates to a material for a metal strip for the production of electrical contact components according to the features in the preamble of patent claim 1 and to the use of such a material for an electrically conductive metal strip for the production of electrical contact components according to the features of patent claim 5.
  • Contact components find a variety of applications in the field of electrical engineering and electronics. As mechanically connectable and separable fasteners whose main task is the production of an electrically conductive contact. In addition to the closing of circuits as well as direct couplings with electronic components can be realized.
  • the particular design is based both on country-specific standards and on the requirements to be met in the field of application.
  • High-quality plug contacts have a stable contact resistance, in which the preservation of the low contact resistance is in the foreground.
  • a change in the contact resistance is usually due to the electrical breakdown of corrosion or foreign layers.
  • they In order to obtain a durable contact surface for such contact components, they often have a tin or chrome coating up to a silver or gold coating.
  • a copper alloy for plug contacts which has a zinc content (Zn) in wt .-% of 23% to 28%.
  • Other constituents are represented by at least 0.01%, with silicon (Si) up to 3%, while nickel (Ni) accounts for up to 5%.
  • the JP 2009/013499 A also discloses a copper material for plug contacts with a proportion of zinc (Zn) in wt .-% of 20% to 41%.
  • the proportion of nickel (Ni) ranges from 0.1% to 5.0%, with the tin content (Sn) of 0.5% to 5.0%.
  • the DE 103 08 779 B3 shows a lead-free copper alloy and its use. Their constituents in wt .-% are for copper (Cu) at least 60% to a maximum of 70% and thus quite high. On the other hand, a content of nickel (Ni) of 0.01% to 0.5% is proposed, while the content of tin (Sn) is from 0.5% to 3.5%. A possible proportion of silicon (Si) may range from 0.01% to 0.5%.
  • US 4,362,579 discloses a copper material for electrical parts made of 0.4-8Ni, 0.1-3Si, 10-35Zn and balance copper.
  • the present invention is therefore based on the object to improve a material for a metal strip for the production of electrical contact components in such a way that it meets the necessary properties for use for an electrically conductive material for the production of electrical contact components despite cost-effective shares of its individual alloying partners.
  • a material for a metal strip for the production of electrical contact components, in particular of plug contacts consisting of a curable alloy with proportions in wt .-% of Zinc (Zn) from 25.0% to 33.0%, Tin (Sn) from 0.5% to 1.2% as well Nickel (Ni) from 0.8% to 2.5% and Silicon (Si) from 0.1% to 0.6%.
  • Zinc Zinc
  • Tin Tin
  • Ni Nickel
  • Si Silicon
  • the remainder of the material is formed from copper (Cu) and impurities caused by melting. Furthermore, the proportion of nickel (Ni) may be at least partially replaced by cobalt (Co). Thus, nickel (Ni) can also be 100% and thus completely replaced by cobalt (Co). The ratio of the proportions of nickel (Ni) and / or cobalt (Co) to the element silicon (Si) ranges from 3.5: 1 to 7.5: 1.
  • the metal strip for the production of electrical contact components consists of the hardenable alloy CuZn30Sn1Ni1Si0,2.
  • the particular advantage lies not only in the high content of zinc (Zn) and the associated favorable production price in the increased strength of the material. Compared to copper, the increased strength is due to the formation of mixed crystals. The solidification achieved in this way is one of the possible strength-increasing processes in order to obtain a hard material from an otherwise relatively soft metal.
  • the precipitation hardening with nickel (Ni) silicides allows a significantly higher strength with good elongations and thus increased flexibility. This is especially true in comparison with pure mixed-crystal-strengthened and cold-strengthened special brasses, such as, for example, CuZn25Sn1. In this way, even in high strength conditions such. B. in R780 (R m ⁇ 780 MPa) still achieve an elongation at break A 50 of> 3% (DIN 50125). The relaxation resistance is significantly better than for CuSn4 and CuZn25Sn1.
  • the proportion of nickel (Ni) may be at least partially replaced by cobalt (Co).
  • a ratio of nickel (Ni) and / or cobalt (Co) to silicon (Si) should be maintained at 3.5: 1 to 7.5: 1.
  • this ratio can be from 4.0: 1 to 5.0: 1.
  • Phosphorus from 0.001% to 0.05%
  • Boron from 0.02% to 0.5%
  • Silver from 0.02% to 0.5%
  • Manganese from 0.03% to 0.8%
  • Chrome from 0.01% to 0.7%
  • Aluminum from 0.02% to 0.5%
  • Magnesium from 0.01% to 0.4%
  • Iron from 0.01% to 0.6% as well Zircon (Zr) from 0.01% to 0.4%
  • Arsenic from 0.001% to 0.1%.
  • the elements contained in the group may optionally be present in the present material.
  • phosphorus (P) and / or boron (B) can be added in the stated amount, serving as a deoxidizer. Their presence causes the free oxygen (O) dissolved in the melt to become bound. In this way, the hydrogen disease is counteracted by preventing the formation of gas bubbles as well as oxidations of alloying constituents.
  • phosphorus (P) serves to improve the tile properties of the present copper alloy during casting.
  • manganese (Mn) When manganese (Mn) is added, its solidifying property on the copper alloy is primarily used. At the same time manganese (Mn) also serves as a deoxidizer.
  • the addition of aluminum (Al) increases the hardness of the material and its yield strength. The said positive increases go thereby without reducing the toughness of the material. Overall, the addition of aluminum (Al) serves to improve the strength, machinability, and wear resistance and oxidation resistance of the alloy at high temperatures.
  • chromium (Cr) and magnesium (Mg) serves to improve the oxidation resistance at high temperatures. This can be better Results can be achieved by mixing chromium (Cr) and magnesium (Mg) with aluminum (Al).
  • zirconium improves the hot workability of the material.
  • the invention shows a use of the copper material for an electrically conductive metal strip.
  • the metal strip is used for the production of electrical contact components, in particular of plug contacts.
  • the metal strip used in this way can be surface-tinned.
  • the metal strip used may comprise a tin-silver layer (SnAg).

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Contacts (AREA)
  • Conductive Materials (AREA)

Description

Die Erfindung betrifft einen Werkstoff für ein Metallband zur Fertigung von elektrischen Kontaktbauteilen gemäß den Merkmalen im Oberbegriff von Patentanspruch 1 sowie die Verwendung eines solchen Werkstoffs für ein elektrisch leitfähiges Metallband zur Fertigung elektrischer Kontaktbauteile gemäß den Merkmalen von Patentanspruch 5.The invention relates to a material for a metal strip for the production of electrical contact components according to the features in the preamble of patent claim 1 and to the use of such a material for an electrically conductive metal strip for the production of electrical contact components according to the features of patent claim 5.

Kontaktbauteile finden im Bereich der Elektrotechnik sowie der Elektronik vielfältige Einsatzmöglichkeiten. Als mechanisch miteinander verbindbare sowie trennbare Verbindungselemente besteht deren Hauptaufgabe in der Herstellung eines elektrisch leitfähigen Kontakts. Neben dem Schließen von Stromkreisen sind so auch direkte Kopplungen mit elektronischen Bauelementen realisierbar.Contact components find a variety of applications in the field of electrical engineering and electronics. As mechanically connectable and separable fasteners whose main task is the production of an electrically conductive contact. In addition to the closing of circuits as well as direct couplings with electronic components can be realized.

Die jeweilige Ausgestaltung orientiert sich sowohl an länderspezifischen Normen als auch an den zu erfüllenden Anforderungen im Einsatzbereich.The particular design is based both on country-specific standards and on the requirements to be met in the field of application.

Insbesondere in Form von Hand lösbarer elektrischer Steckkontakte sind somit auch erhöhte Anforderungen an deren mechanische Belastbarkeit gestellt.In particular, in the form of hand-releasable electrical plug contacts thus increased demands are placed on their mechanical strength.

Hochwertige Steckkontakte weisen einen stabilen Kontaktwiderstand auf, bei denen der Erhalt des geringen Übergangswiderstandes im Vordergrund steht. Eine Veränderung des Kontaktwiderstandes ist zumeist auf das elektrische Durchbrechen von Korrosions- oder Fremdschichten zurückzuführen. Um eine möglichst haltbare Kontaktoberfläche für derartige Kontaktbauteile zu erhalten, weisen diese oftmals eine Zinn- oder Chrombeschichtung bis hin zu einer Silber- oder Goldbeschichtung auf.High-quality plug contacts have a stable contact resistance, in which the preservation of the low contact resistance is in the foreground. A change in the contact resistance is usually due to the electrical breakdown of corrosion or foreign layers. In order to obtain a durable contact surface for such contact components, they often have a tin or chrome coating up to a silver or gold coating.

Für die Herstellung derartiger Steckkontakte finden zumeist Metallbänder aus einer Kupferlegierung Verwendung, aus denen die jeweiligen Formen ausgestanzt werden. Je nach verwendeter Menge der Legierungspartner Zink oder Zinn handelt es sich dann entweder um Messing oder knetbare Bronze, wie beispielsweise CuSn4 bis CuSn8. Letzterer. Werkstoff weist eine hervorragende Biegbarkeit bei mittlerer Festigkeit auf. Da es sich hierbei um mischkristall- und kaltverfestigte Werkstoffe handelt, ist deren Beständigkeit gegenüber Relaxation allerdings relativ niedrig. Zudem nimmt die Biegbarkeit bei hohen Festigkeitszuständen > R700 (Rm ≥ 700 MPa, DIN EN 1173/95) deutlich ab, was sich in größeren Biegeradien mit stärkerer Rissbildung niederschlägt.For the production of such plug contacts are usually metal bands of a copper alloy use, from which the respective shapes are punched out. Depending on the amount of alloying partners zinc or tin used, it is then either brass or malleable bronze, such as CuSn4 to CuSn8. The latter. Material has excellent flexibility with medium strength. However, since these are mixed-crystal and work-hardened materials, their resistance to relaxation is relatively low. In addition, the bendability at high strength conditions> R700 (R m ≥ 700 MPa, DIN EN 1173/95) decreases significantly, which is reflected in larger bending radii with greater cracking.

Da es sich bei elektrischen Kontaktbauteilen um Massenartikel handelt, sind die Einkaufspreise für den jeweiligen Grundwerkstoff von hoher Bedeutung. Ausschlaggebend ist der jeweilige Gehalt an Kupfer innerhalb der Legierung. Aufgrund des hohen Zinkanteils in Messing weisen Kupferlegierungen mit einem hohen Kupferanteil daher einen demgegenüber um rund 20 % höheren Preis auf.Since electrical contact components are mass-produced, the purchase prices for the respective base material are of great importance. Decisive is the respective content of copper within the alloy. Due to the high proportion of zinc in brass, copper alloys with a high copper content therefore have a price that is around 20% higher.

Aus der JP 2008/208466 A ist eine Kupferlegierung für Steckkontakte bekannt, welche einen Zinkanteil (Zn) in Gew.-% von 23 % bis 28 % aufweist. Weitere folgende Bestandteile sind mit mindestens 0,01 % vertreten, wobei Silizium (Si) bis maximal 3 % reicht, während Nickel (Ni) einen Anteil von bis zu 5 % ausmacht.From the JP 2008/208466 A a copper alloy for plug contacts is known, which has a zinc content (Zn) in wt .-% of 23% to 28%. Other constituents are represented by at least 0.01%, with silicon (Si) up to 3%, while nickel (Ni) accounts for up to 5%.

Die JP 2009/013499 A offenbart ebenfalls einen Kupferwerkstoff für Steckkontakte mit einem Anteil an Zink (Zn) in Gew.-% von 20 % bis 41 %. Der Anteil an Nickel (Ni) reicht dabei von 0,1 % bis 5,0 %, wobei der Zinnanteil (Sn) von 0,5 % bis 5,0 % beträgt.The JP 2009/013499 A also discloses a copper material for plug contacts with a proportion of zinc (Zn) in wt .-% of 20% to 41%. The proportion of nickel (Ni) ranges from 0.1% to 5.0%, with the tin content (Sn) of 0.5% to 5.0%.

Die DE 103 08 779 B3 zeigt eine bleifreie Kupferlegierung sowie deren Verwendung auf. Deren Bestandteile in Gew.-% liegen für Kupfer (Cu) bei wenigstens 60 % bis maximal 70 % und damit recht hoch. Demgegenüber wird ein Anteil an Nickel (Ni) von 0,01 % bis 0,5 % vorgeschlagen, während sich der Anteil an Zinn (Sn) von 0,5 % bis 3,5 % bewegt. Ein möglicher Anteil an Silizium (Si) kann von 0,01 % bis 0,5 % reichen.The DE 103 08 779 B3 shows a lead-free copper alloy and its use. Their constituents in wt .-% are for copper (Cu) at least 60% to a maximum of 70% and thus quite high. On the other hand, a content of nickel (Ni) of 0.01% to 0.5% is proposed, while the content of tin (Sn) is from 0.5% to 3.5%. A possible proportion of silicon (Si) may range from 0.01% to 0.5%.

US 4 362 579 offenbart einen Kupferwerkstoff für elektrischen Teile aus 0.4-8 Ni, 0.1-3 Si, 10-35 Zn und Rest Kupfer. US 4,362,579 discloses a copper material for electrical parts made of 0.4-8Ni, 0.1-3Si, 10-35Zn and balance copper.

Insbesondere der hohe Anteil an Kupfer zieht recht hohe Einkaufspreise für den Grundwerkstoff mit sich. Weiterhin bieten auch die Anteile der weiteren Legierungspartner in Bezug auf verbesserte Werkstoffeigenschaften noch Raum für Verbesserungen.In particular, the high proportion of copper attracts quite high purchase prices for the base material. Furthermore, the shares of the other alloying partners in terms of improved material properties still offer room for improvement.

Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, einen Werkstoff für ein Metallband zur Fertigung von elektrischen Kontaktbauteilen dahingehend zu verbessern, dass dieser trotz kostengünstiger Anteile seiner einzelnen Legierungspartner die notwendigen Eigenschaften zur Verwendung für ein elektrisch leitfähiges Material zur Fertigung von elektrischen Kontaktbauteilen erfüllt.The present invention is therefore based on the object to improve a material for a metal strip for the production of electrical contact components in such a way that it meets the necessary properties for use for an electrically conductive material for the production of electrical contact components despite cost-effective shares of its individual alloying partners.

Die Lösung dieser Aufgabe besteht nach der Erfindung in einem Werkstoff für ein Metallband zur Fertigung von elektrischen Kontaktbauteilen gemäß den Merkmalen von Patentanspruch 1.The solution to this problem consists according to the invention in a material for a metal strip for the production of electrical contact components according to the features of claim 1.

Hiernach wird ein Werkstoff für ein Metallband zur Fertigung von elektrischen Kontaktbauteilen, insbesondere von Steckkontakten, vorgeschlagen, bestehend aus einer aushärtbaren Legierung mit Anteilen in Gew.-% an Zink (Zn) von 25,0 % bis 33,0 %, Zinn (Sn) von 0,5 % bis 1,2 % sowie Nickel (Ni) von 0,8 % bis 2,5 % und Silizium (Si) von 0,1 % bis 0,6 %. Hereinafter, a material for a metal strip for the production of electrical contact components, in particular of plug contacts, proposed, consisting of a curable alloy with proportions in wt .-% of Zinc (Zn) from 25.0% to 33.0%, Tin (Sn) from 0.5% to 1.2% as well Nickel (Ni) from 0.8% to 2.5% and Silicon (Si) from 0.1% to 0.6%.

Zudem kann der Werkstoff optional wenigstens ein Element aus der folgenden Gruppe aufweisen:

  • Phosphor (P), Bor (B), Silber (Ag), Mangan (Mn), Chrom (Cr), Aluminium (Al), Magnesium (Mg), Eisen (Fe), Zirkon (Zr) oder Arsen (As).
In addition, the material may optionally comprise at least one element from the following group:
  • Phosphorus (P), boron (B), silver (Ag), manganese (Mn), chromium (Cr), aluminum (Al), magnesium (Mg), iron (Fe), zirconium (Zr) or arsenic (As).

Sofern alle Elemente aus der Gruppe vorhanden sind, bilden diese einen maximalen Gesamtanteil von 4,55 % des Werkstoffs. Grundsätzlich weist keines der Elemente aus der Gruppe bei seinem Vorhandensein einen 0,8 % überschreitenden Anteil an der Gesamtlegierung auf.If all elements of the group are present, they form a maximum total of 4.55% of the material. In principle, none of the elements from the group has, in its presence, a proportion of the total alloy exceeding 0.8%.

Der Rest des Werkstoffs wird aus Kupfer (Cu) sowie erschmelzungsbedingten Verunreinigungen gebildet. Weiterhin kann der Anteil an Nickel (Ni) zumindest teilweise durch Cobalt (Co) ersetzt sein. Somit kann Nickel (Ni) auch zu 100% und somit vollständig durch Cobalt (Co) ersetzt sein. Das Verhältnis der Anteile von Nickel (Ni) und/oder Cobalt (Co) zu dem Element Silizium (Si) reicht von 3,5 : 1 bis 7,5 : 1.The remainder of the material is formed from copper (Cu) and impurities caused by melting. Furthermore, the proportion of nickel (Ni) may be at least partially replaced by cobalt (Co). Thus, nickel (Ni) can also be 100% and thus completely replaced by cobalt (Co). The ratio of the proportions of nickel (Ni) and / or cobalt (Co) to the element silicon (Si) ranges from 3.5: 1 to 7.5: 1.

Das Metallband zur Fertigung von elektrischen Kontaktbauteilen besteht aus der aushärtbaren Legierung CuZn30Sn1Ni1Si0,2.The metal strip for the production of electrical contact components consists of the hardenable alloy CuZn30Sn1Ni1Si0,2.

Der besondere Vorteil liegt neben dem hohen Gehalt an Zink (Zn) und dem damit einhergehenden günstigen Herstellungspreis in der gesteigerten Festigkeit des Werkstoffs. Gegenüber Kupfer beruht die erhöhte Festigkeit auf der Mischkristallbildung. Die so erreichte Verfestigung ist eine der möglichen festigkeitssteigernden Vorgänge, um aus einem ansonsten relativ weichen Metall einen harten Werkstoff zu erhalten.The particular advantage lies not only in the high content of zinc (Zn) and the associated favorable production price in the increased strength of the material. Compared to copper, the increased strength is due to the formation of mixed crystals. The solidification achieved in this way is one of the possible strength-increasing processes in order to obtain a hard material from an otherwise relatively soft metal.

Weiterhin lässt sich durch die Ausscheidungshärtung mit Nickel (Ni) - Siliziden eine deutlich höhere Festigkeit bei guten Dehnungen und damit erhöhter Biegbarkeit erzielen. Dies insbesondere gegenüber reinen mischkristallverfestigten und kaltverfestigten Sondermessingen, wie beispielsweise CuZn25Sn1. Auf diese Weise lässt sich auch in hohen Festigkeitszuständen wie z. B. bei R780 (Rm ≥ 780 MPa) noch eine Bruchdehnung A50 von > 3 % erzielen (DIN 50125). Dabei ist die Relaxationsbeständigkeit deutlich besser als bei CuSn4 und CuZn25Sn1.Furthermore, the precipitation hardening with nickel (Ni) silicides allows a significantly higher strength with good elongations and thus increased flexibility. This is especially true in comparison with pure mixed-crystal-strengthened and cold-strengthened special brasses, such as, for example, CuZn25Sn1. In this way, even in high strength conditions such. B. in R780 (R m ≥ 780 MPa) still achieve an elongation at break A 50 of> 3% (DIN 50125). The relaxation resistance is significantly better than for CuSn4 and CuZn25Sn1.

Vorteilhafte Weiterbildungen des grundsätzlichen Erfindungsgedankens sind Gegenstand der abhängigen Patentansprüche 2 bis 7. Hiernach kann der bevorzugte Anteil in Gew.-% an Zink (Zn) von 27,0 % bis 31,0 %, Zinn (Sn) von 0,5 % bis 1,2 % sowie Nickel (Ni) von 0,8 % bis 2,0 % und Silizium (Si) von 0,1 % bis 0,6 % betragen.Advantageous developments of the basic concept of the invention are the subject of the dependent claims 2 to 7. Hereinafter, the preferred proportion in wt .-% of Zinc (Zn) from 27.0% to 31.0%, Tin (Sn) from 0.5% to 1.2% as well Nickel (Ni) from 0.8% to 2.0% and Silicon (Si) from 0.1% to 0.6% be.

Es kann der Anteil an Nickel (Ni) zumindest teilweise durch Cobalt (Co) ersetzt sein.The proportion of nickel (Ni) may be at least partially replaced by cobalt (Co).

Für eine optimale Ausscheidungshärtung ist ein Verhältnis von Nickel (Ni) und/oder Cobalt (Co) zu Silizium (Si) von 3,5 : 1 bis 7,5 : 1 einzuhalten. Vorzugsweise kann dieses Verhältnis von 4,0 : 1 bis 5,0 : 1 betragen.For optimal precipitation hardening, a ratio of nickel (Ni) and / or cobalt (Co) to silicon (Si) should be maintained at 3.5: 1 to 7.5: 1. Preferably, this ratio can be from 4.0: 1 to 5.0: 1.

Die optionale Anwesenheit einzelner Elemente aus der Gruppe in Anteilen in Gew.-% beträgt bei ihrem Vorhandensein bevorzugt: Phosphor(P) von 0,001 % bis 0,05 %, Bor (B) von 0,02 % bis 0,5 %, Silber (Ag) von 0,02 % bis 0,5 %, Mangan (Mn) von 0,03 % bis 0,8 %, Chrom (Cr) von 0,01 % bis 0,7 %, Aluminium (Al) von 0,02 % bis 0,5 %, Magnesium (Mg) von 0,01 % bis 0,4 %, Eisen (Fe) von 0,01 % bis 0,6 % sowie Zirkon (Zr) von 0,01 % bis 0,4 % und Arsen (As) von 0,001 % bis 0,1 %. The optional presence of individual elements from the group in proportions in% by weight is preferred in their presence: Phosphorus (P) from 0.001% to 0.05%, Boron (B) from 0.02% to 0.5%, Silver (Ag) from 0.02% to 0.5%, Manganese (Mn) from 0.03% to 0.8%, Chrome (Cr) from 0.01% to 0.7%, Aluminum (Al) from 0.02% to 0.5%, Magnesium (Mg) from 0.01% to 0.4%, Iron (Fe) from 0.01% to 0.6% as well Zircon (Zr) from 0.01% to 0.4% and Arsenic (As) from 0.001% to 0.1%.

Die in der Gruppe enthaltenen Elemente können optional in dem vorliegenden Werkstoff vorhanden sein. So können Phosphor (P) und/oder Bor (B) in der angegebenen Menge zugegeben werden, wobei sie als Desoxidationsmittel dienen. Deren Vorhandensein bewirkt, dass der in der Schmelze gelöste freie Sauerstoff (O) gebunden wird. Auf diese Weise wird der Wasserstoffkrankheit entgegengewirkt, indem die Bildung von Gasblasen sowie Oxidationen von Legierungsbestandteilen verhindert wird.The elements contained in the group may optionally be present in the present material. Thus, phosphorus (P) and / or boron (B) can be added in the stated amount, serving as a deoxidizer. Their presence causes the free oxygen (O) dissolved in the melt to become bound. In this way, the hydrogen disease is counteracted by preventing the formation of gas bubbles as well as oxidations of alloying constituents.

Darüber hinaus dient Phosphor (P) dazu, die Flieseigenschaften der vorliegenden Kupferlegierung beim Gießen zu verbessern.In addition, phosphorus (P) serves to improve the tile properties of the present copper alloy during casting.

Bei Zugabe von Mangan (Mn) wird primär dessen verfestigende Eigenschaft auf die Kupferlegierung genutzt. Gleichzeitig dient Mangan (Mn) auch ebenfalls als Desoxidationsmittel.When manganese (Mn) is added, its solidifying property on the copper alloy is primarily used. At the same time manganese (Mn) also serves as a deoxidizer.

Durch die Zugabe von Alumnium (Al) erhöht sich die Härte des Werkstoffs sowie dessen Dehngrenze. Die besagten positiven Erhöhungen gehen dabei ohne Verminderung der Zähigkeit des Werkstoffs einher. Insgesamt dient die Zugabe von Aluminium (Al) dazu, die Festigkeit, die Bearbeitbarkeit sowie die Verschleißbeständigkeit und die Oxidationsresistenz der Legierung bei hohen Temperaturen zu verbessern.The addition of aluminum (Al) increases the hardness of the material and its yield strength. The said positive increases go thereby without reducing the toughness of the material. Overall, the addition of aluminum (Al) serves to improve the strength, machinability, and wear resistance and oxidation resistance of the alloy at high temperatures.

Die Zugabe von Chrom (Cr) und Magnesium (Mg) dient zur Verbesserung der Oxidationsresistenz bei hohen Temperaturen. Hierbei können bessere Ergebnisse erzielt werden, indem Chrom (Cr) und Magnesium (Mg) mit Aluminium (Al) gemischt werden.The addition of chromium (Cr) and magnesium (Mg) serves to improve the oxidation resistance at high temperatures. This can be better Results can be achieved by mixing chromium (Cr) and magnesium (Mg) with aluminum (Al).

Die Zugabe von Eisen (Fe) in der zuvor aufgezeigten Größenordnung wirkt kornfeinend und insgesamt verfestigend. In Verbindung mit Phosphor (P) bilden sich Eisenphosphiede.The addition of iron (Fe) in the previously indicated order of magnitude has a grain-refining and overall strengthening effect. In conjunction with phosphorus (P) Eisenphosphiede form.

Durch die Zugabe von Zirkon (Zr) wird die Warmumformbarkeit des Werkstoffs verbessert.The addition of zirconium (Zr) improves the hot workability of the material.

Weiterhin bewirkt die Zugabe von Arsen (As) eine Verringerung der Entzinkungsneigung.Furthermore, the addition of arsenic (As) causes a reduction in Entzinkungsneigung.

Im Ergebnis wird ein Kupferwerkstoff aufgezeigt, welcher aufgrund seines geringen Kupferanteils eine kostengünstige Möglichkeit zur Herstellung von elektrischen Kontaktbauteilen ermöglicht. Trotz des geringen Anteils an Kupfer (Cu) werden dennoch die notwendigen Eigenschaften zur Verwendung für ein elektrisch leitfähiges Material zur Fertigung von elektrischen Kontaktbauteilen erfüllt. Der so erzeugte Kupferwerkstoff kann in Form von Metallbändern Verwendung finden, welche zur Fertigung von elektrischen Kontaktbauteilen dienen.As a result, a copper material is shown, which due to its low copper content enables a cost-effective possibility for the production of electrical contact components. Despite the small proportion of copper (Cu), the necessary properties for use for an electrically conductive material for the production of electrical contact components are nevertheless fulfilled. The copper material produced in this way can be used in the form of metal strips which serve for the production of electrical contact components.

Weiterhin zeigt die Erfindung eine Verwendung des Kupferwerkstoffs für ein elektrisch leitfähiges Metallband auf. Das Metallband dient zur Fertigung von elektrischen Kontaktbauteilen, insbesondere von Steckkontakten.Furthermore, the invention shows a use of the copper material for an electrically conductive metal strip. The metal strip is used for the production of electrical contact components, in particular of plug contacts.

Je nach Anforderung kann das so verwendete Metallband oberflächlich verzinnt sein.Depending on the requirement, the metal strip used in this way can be surface-tinned.

In einer alternativen Ausgestaltung kann das verwendete Metallband eine Zinn-Silber-Schicht (SnAg) aufweisen.In an alternative embodiment, the metal strip used may comprise a tin-silver layer (SnAg).

Claims (7)

  1. Material for a metal strip for producing electrical contact components, in particular plug contacts, consisting of a precipitation hardening copper alloy having the following alloying components in % wt.: Zinc (Zn) 25.0 % to 33.0 % Tin (Sn) 0.5% to 1.2 % Nickel (Ni) 0.8 % to 2.5 % Silicon (Si) 0.1 % to 0.6 %,
    optionally at least one element from the following group:
    phosphorus (P), boron (B), silver (Ag), manganese (Mn), chromium (Cr),
    aluminium (Al), magnesium (Mg), iron (Fe), zirconium (Zr) or arsenic (As),
    wherein the proportion of an individual element from the group is at most 0.8 % and the proportion of all elements from the group is at most 4.55 %, with the remainder copper (Cu) and impurities resulting from the melting process, wherein nickel (Ni) is at least partly replaceable by cobalt (Co) and the ratio of nickel (Ni) and/or cobalt (Co) to silicon (Si) ranges from 3.5 : 1 to 7.5 : 1.
  2. Material according to claim 1, characterised by a proportion in % wt. of Zinc (Zn) 27.0 % to 31.0 % Tin (Sn) 0.5 % to 1.2 % Nickel (Ni) 0.8 % to 2.0 % Silicon (Si) 0.1 % to 0.6 %,
    wherein nickel (Ni) is at least partly replaceable by cobalt (Co).
  3. Material according to either of claims 1 and 2, characterised in that the ratio of nickel (Ni) and/or cobalt (Co) to silicon (Si) is from 4.0 : 1 to 5.0 : 1.
  4. Material according to any one of claims 1 to 3, characterised in that the optional elements in the group when they are present correspond to the following proportions in % wt.: Phosphorus(P) 0.001 % to 0.05 % Boron (B) 0.02 % to 0.5 % Silver (Ag) 0.02 % to 0.5 % Manganese (Mn) 0.03 % to 0.8 % Chromium (Cr) 0.01 % to 0.7 % Aluminium (Al) 0.02 % to 0.5 % Magnesium (Mg) 0.01 % to 0.4 % Iron (Fe) 0.01 % to 0.6 % Zirconium (Zn) 0.01 % to 0.4 % Arsenic (As) 0.001 % to 0.1 %.
  5. Use of a material according to any one of claims 1 to 4 for an electrically conductive metal strip for producing electrical contact components, in particular plug contacts.
  6. Use of a material for an electrically conductive metal strip according to claim 5, characterised in that the metal strip is tinned strip.
  7. Use of a material for an electrically conductive metal strip according to claim 5 or 6, characterised in that the metal strip has a tin-silver layer.
EP12780079.5A 2012-10-10 2012-10-10 Material for electric contact components Active EP2906733B1 (en)

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US11293084B2 (en) * 2016-10-28 2022-04-05 Dowa Metaltech Co., Ltd. Sheet matertal of copper alloy and method for producing same
DE102018100440A1 (en) * 2018-01-10 2019-07-11 Phoenix Contact Gmbh & Co. Kg A method of making a cold-formable crimp contact, method of making an electro-mechanical crimp connection and crimp contact
JP6713074B1 (en) * 2019-04-16 2020-06-24 Ｄｏｗａメタルテック株式会社 Copper alloy sheet and method for producing the same

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JP3413864B2 (en) * 1993-02-05 2003-06-09 三菱伸銅株式会社 Connector for electrical and electronic equipment made of Cu alloy
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JP4068626B2 (en) * 2005-03-31 2008-03-26 日鉱金属株式会社 Cu-Ni-Si-Co-Cr-based copper alloy for electronic materials and method for producing the same
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JP5191725B2 (en) * 2007-08-13 2013-05-08 Ｄｏｗａメタルテック株式会社 Cu-Zn-Sn based copper alloy sheet, manufacturing method thereof, and connector
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WO2014056466A1 (en) 2014-04-17
JP6147351B2 (en) 2017-06-14
MX351542B (en) 2017-10-19
DK2906733T3 (en) 2016-09-26
CN104704134A (en) 2015-06-10
PL2906733T3 (en) 2017-11-30
ES2593624T3 (en) 2016-12-12
HK1205768A1 (en) 2015-12-24
JP2015537117A (en) 2015-12-24
MX2015004305A (en) 2015-11-13

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