EP1388380A1 - Low-alloy copper alloy and hollow component produced thereby - Google Patents

Low-alloy copper alloy and hollow component produced thereby Download PDF

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Publication number
EP1388380A1
EP1388380A1 EP03014379A EP03014379A EP1388380A1 EP 1388380 A1 EP1388380 A1 EP 1388380A1 EP 03014379 A EP03014379 A EP 03014379A EP 03014379 A EP03014379 A EP 03014379A EP 1388380 A1 EP1388380 A1 EP 1388380A1
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EP
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Prior art keywords
copper alloy
weight
alloy
low
phosphorus
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Granted
Application number
EP03014379A
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German (de)
French (fr)
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EP1388380B1 (en
Inventor
Meinhard Hecht
Mathias Dr.-Ing. Konczalla
Ulrich Naumann
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KM Europa Metal AG
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KM Europa Metal AG
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Priority to DK03014379T priority Critical patent/DK1388380T3/en
Publication of EP1388380A1 publication Critical patent/EP1388380A1/en
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Publication of EP1388380B1 publication Critical patent/EP1388380B1/en
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Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/053—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure characterised by the material of the blanks

Definitions

  • the invention relates to the use of a low-alloy phosphorus deoxidized Copper alloy for the production of hollow profile components by internal high pressure forming according to the features of claim 1 and one from the Hollow section component made of copper alloy.
  • Internal hydroforming is understood to mean processes in which tubular Workpieces or hollow profiles are formed with active media support.
  • improved properties can be manufactured with high precision using other methods would not be possible or could only be realized with much higher effort.
  • suitable components and Materials especially the knowledge of the process control limits of importance. For example, an internal pressure that is too low and one that is applied at the same time Too much displacement of the pipe ends to unfold or kink the Workpiece lead, whereas a strong internal pressure with too little Pushing the pipe ends results in failure due to tearing or bursting can pull.
  • the object of the invention is for use in hydroforming for the production of hollow profile components to show low-alloy phosphorus-deoxidized copper alloy, which in the undeformed Condition has an increased yield strength and an increased tendency to harden already at low degrees of deformation.
  • Another object of the invention is to achieve a high pressure forming to show manufactured hollow profile component with improved material properties.
  • the invention solves the procedural part of the task through the use a low alloy phosphorus deoxidized copper alloy (Cu-DHP) with the Features of claim 1.
  • the copper alloy is 0.030 to 0.080% by weight of at least one element made of tin (Sn), zinc (Zn), iron (Fe) and silver (Ag) existing group as well as the by standardization prescribed phosphorus content of 0.015 to 0.040 wt .-%, and at least 99.90% by weight copper and the remainder unavoidable impurities.
  • the elements tin and zinc are preferably used, in particular in Proportions of 0.030 to 0.050 wt .-%, preferably tin with a mass fraction of 0.050% by weight (claims 2 and 3). Also additions of silver in the The order of magnitude of 0.008 to 0.010% by weight (claim 4) also leads to one Increasing the yield strength or the 0.2% proof stress. It is the same with an alloy of silver with a mass fraction of 0.002 to 0.007% by weight and at the same time iron with a mass fraction of 0.005 to 0.010% by weight (Claim 5).
  • Residual weight fractions include the sum of As, Bi, Cd, Co, Cr, Mn, Ni, O, Pb, S, Sb, Se, Si and Te.
  • a phosphorus-deoxidized is particularly advantageous Copper alloy with a weight fraction of 99.90% to 99.95% copper considered with addition of tin in the order of 0.030 to 0.050% by weight, in particular 0.050% by weight.
  • the objective part of the task is a profile component according to the Features of claim 6 solved. This is made from a DHP copper Prepared composition described above, especially in one Tin content from 0.030 to 0.050% by weight.
  • the hollow profile component is preferably a piece of pipe with at least one branch, especially a T-piece.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Conductive Materials (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Powder Metallurgy (AREA)
  • Treatment And Processing Of Natural Fur Or Leather (AREA)
  • Contacts (AREA)
  • Metal Extraction Processes (AREA)
  • Ceramic Products (AREA)
  • Filtering Materials (AREA)

Abstract

Low-alloyed phosphorus-deoxidized copper alloy used in the manufacture of hollow profile parts by inner high pressure deformation is new. The copper alloy contains (in weight %) 0.030-0.080 Sn, Zn, Fe and/or Ag, 0.015-0.040 O, and at least 99.90 Cu. An independent claim is also included for a hollow profile part produced by inner high pressure deformation of a low-alloyed phosphorus-deoxidized copper alloy.

Description

Die Erfindung betrifft die Verwendung einer niedriglegierten phosphordesoxidierten Kupferlegierung für die Herstellung von Hohlprofilbauteilen durch Innenhochdruckumformung nach den Merkmalen des Patentanspruchs 1 sowie ein aus der Kupferlegierung hergestelltes Hohlprofilbauteil.The invention relates to the use of a low-alloy phosphorus deoxidized Copper alloy for the production of hollow profile components by internal high pressure forming according to the features of claim 1 and one from the Hollow section component made of copper alloy.

Unter Innenhochdruckumformung sind Prozesse zu verstehen, bei denen rohrförmige Werkstücke bzw. Hohlprofile unter Wirkmedienunterstützung umgeformt werden. Mit dem Verfahren der Innenhochdruckumformung sind Hohlprofilbauteile mit verbesserten Eigenschaften in hoher Präzision herstellbar, die mit anderen Verfahren nicht oder nur mit ungleich höherem Aufwand realisierbar wären. Für die erfolgreiche Anwendung des Verfahrens ist neben der Auswahl geeigneter Bauteile und Werkstoffe vor allem das Wissen um die Prozeßführungsgrenzen von Bedeutung. Beispielsweise kann ein zu geringer Innendruck und eine gleichzeitig aufgebrachte zu große Verschiebung der Rohrenden zum Auffalten oder zum Knicken des Werkstücks führen, wohingegen ein starker Innendruck bei zu geringem Nachschieben der Rohrenden ein Versagen durch Reißen bzw. Bersten nach sich ziehen kann.Internal hydroforming is understood to mean processes in which tubular Workpieces or hollow profiles are formed with active media support. With The process of hydroforming involves using hollow profile components improved properties can be manufactured with high precision using other methods would not be possible or could only be realized with much higher effort. For the successful Application of the process is in addition to the selection of suitable components and Materials especially the knowledge of the process control limits of importance. For example, an internal pressure that is too low and one that is applied at the same time Too much displacement of the pipe ends to unfold or kink the Workpiece lead, whereas a strong internal pressure with too little Pushing the pipe ends results in failure due to tearing or bursting can pull.

Außer nahtlosen und geschweißten Rohren werden auch alternative rohrförmige Halbzeuge mit dieser Verfahrenskombination erfolgreich umgeformt, wobei neben verschiedenen Stahlwerkstoffen auch Nichteisenmetalle zum Einsatz kommen. Insbesondere zur Herstellung von Fittingen im Rohrleitungsbau kommen sauerstoffreie, mit Phosphor desoxidierte Kupfersorten mit dem EN-Kurzzeichen Cu-DHP zum Einsatz mit einem vorgeschriebenen Restphosphorgehalt von 0,015 bis 0,040 %. DHP-Kupfer ist sehr gut schweiß- und hartlötbar und die wichtigste Kupfersorte im Maschinen, Apparate- und Rohrleitungsbau.In addition to seamless and welded tubes, alternative tubular ones are also available Semi-finished products successfully formed with this combination of processes, in addition to various steel materials and non-ferrous metals are used. In particular for the manufacture of fittings in pipeline construction Oxygen-free copper types deoxidized with phosphorus with the EN abbreviation Cu-DHP for use with a prescribed residual phosphorus content of 0.015 to 0.040%. DHP copper is very easy to weld and braze and is the most important Type of copper in machines, apparatus and pipeline construction.

Obwohl Kupfer sehr duktil also sehr gut kaltverformbar ist und während der Kaltumformung zunehmende Verfestigungen zeigt, kann es zu Problemen bei der Innenhochdruckumformung in Form von Falten und Rissen kommen. Diese Fehler können nicht allein auf die Verfahrensparameter zurückgeführt werden.Although copper is very ductile, it can be cold worked very well and during cold forming shows increasing hardening, there can be problems with hydroforming come in the form of folds and tears. These mistakes can cannot be attributed solely to the process parameters.

Hiervon ausgehend liegt der Erfindung die Aufgabe zugrunde, für die Verwendung bei der Innenhochdruckumformung zur Herstellung von Hohlprofilbauteilen eine niedriglegierte phosphordesoxidierte Kupferlegierung aufzuzeigen, welche im unverformten Zustand eine erhöhte Streckgrenze besitzt sowie eine erhöhte Verfestigungsneigung bereits bei geringen Umformgraden aufweist.Proceeding from this, the object of the invention is for use in hydroforming for the production of hollow profile components to show low-alloy phosphorus-deoxidized copper alloy, which in the undeformed Condition has an increased yield strength and an increased tendency to harden already at low degrees of deformation.

Eine weitere Aufgabe der Erfindung ist es, ein durch Innenhochdruckumformung hergestelltes Hohlprofilbauteil mit verbesserten Materialeigenschaften aufzuzeigen.Another object of the invention is to achieve a high pressure forming to show manufactured hollow profile component with improved material properties.

Die Erfindung löst den verfahrensmäßigen Teil der Aufgabe durch die Verwendung einer niedriglegierten phosphordesoxidierten Kupferlegierung (Cu-DHP) mit den Merkmalen des Patentanspruchs 1. Hiernach soll die Kupferlegierung 0,030 bis 0,080 Gew.-% mindestens eines Elements einer aus Zinn (Sn), Zink (Zn), Eisen (Fe) und Silber (Ag) bestehenden Gruppe besitzen sowie den durch Normung vorgeschriebenen Phosphorgehalt von 0,015 bis 0,040 Gew.-%, sowie wenigstens 99,90 Gew.-% Kupfer und als Rest unvermeidbare Verunreinigungen. The invention solves the procedural part of the task through the use a low alloy phosphorus deoxidized copper alloy (Cu-DHP) with the Features of claim 1. According to this, the copper alloy is 0.030 to 0.080% by weight of at least one element made of tin (Sn), zinc (Zn), iron (Fe) and silver (Ag) existing group as well as the by standardization prescribed phosphorus content of 0.015 to 0.040 wt .-%, and at least 99.90% by weight copper and the remainder unavoidable impurities.

Durch Versuche hat sich gezeigt, daß das Kaltverfestigungsverhalten von DHP-Cu, insbesondere durch die Zugabe von Zinn, bis an die maximal mögliche Grenze für DHP-Cu erhöht werden kann. Es hat sich auch gezeigt, daß Zugaben in der Größenordnung von Verunreinigungen, also etwa in der Größenordnung von 0,001 Gew.-%, keinen relevanten Einfluß auf das Kaltverfestigungsverhalten haben.Experiments have shown that the work hardening behavior of DHP-Cu, especially by adding tin up to the maximum possible limit for DHP-Cu can be increased. It has also been shown that encores in the Magnitude of impurities, i.e. of the order of 0.001 % By weight have no relevant influence on the work hardening behavior.

Vorzugsweise kommen die Elemente Zinn und Zink zum Einsatz, insbesondere in Anteilen von 0,030 bis 0,050 Gew.-%, vorzugsweise Zinn mit einem Massenanteil von 0,050 Gew.-% (Ansprüche 2 und 3). Auch Zugaben von Silber in der Größenordnung von 0,008 bis 0,010 Gew.-% (Anspruch 4) führen ebenso zu einer Erhöhung der Streckgrenze bzw. der 0,2 %-Dehngrenze. Ebenso verhält es sich bei einer Zulegierung von Silber mit einem Massenanteil von 0,002 bis 0,007 Gew.-% und gleichzeitig von Eisen mit einem Massenanteil von 0,005 bis 0,010 Gew.-% (Anspruch 5).The elements tin and zinc are preferably used, in particular in Proportions of 0.030 to 0.050 wt .-%, preferably tin with a mass fraction of 0.050% by weight (claims 2 and 3). Also additions of silver in the The order of magnitude of 0.008 to 0.010% by weight (claim 4) also leads to one Increasing the yield strength or the 0.2% proof stress. It is the same with an alloy of silver with a mass fraction of 0.002 to 0.007% by weight and at the same time iron with a mass fraction of 0.005 to 0.010% by weight (Claim 5).

Die im Rahmen der Erfindung als unvermeidbare Verunreinigungen bezeichneten Restgewichtsanteile umfassen die Summe von As, Bi, Cd, Co, Cr, Mn, Ni, O, Pb, S, Sb, Se, Si und Te.The so-called inevitable impurities in the context of the invention Residual weight fractions include the sum of As, Bi, Cd, Co, Cr, Mn, Ni, O, Pb, S, Sb, Se, Si and Te.

Als besonders vorteilhafte wird die Verwendung einer phosphordesoxidierten Kupferlegierung mit einem Gewichtsanteil von 99,90 % bis 99,95 % Kupfer erachtet bei Zulegierung von Zinn in der Größenordnung von 0,030 bis 0,050 Gew.-%, insbesondere von 0,050 Gew.-%.The use of a phosphorus-deoxidized is particularly advantageous Copper alloy with a weight fraction of 99.90% to 99.95% copper considered with addition of tin in the order of 0.030 to 0.050% by weight, in particular 0.050% by weight.

Der gegenständliche Teil der Aufgabe wird durch ein Profilbauteil nach den Merkmalen des Patentanspruchs 6 gelöst. Dieses ist aus einem DHP-Kupfer der zuvor beschriebenen Zusammensetzung hergestellt, insbesondere bei einem Zinngehalt von 0,030 bis 0,050 Gew.-%.The objective part of the task is a profile component according to the Features of claim 6 solved. This is made from a DHP copper Prepared composition described above, especially in one Tin content from 0.030 to 0.050% by weight.

Das Hohlprofilbauteil ist vorzugsweise ein Rohrstück mit wenigstens einem Abzweig, insbesondere ein T-Stück.The hollow profile component is preferably a piece of pipe with at least one branch, especially a T-piece.

Claims (6)

Verwendung einer niedriglegierten phosphordesoxidierten Kupferlegierung für die Herstellung von Hohlprofilbauteilen durch Innenhochdruckumformung, wobei die Kupferlegierung folgende Zusammensetzung aufweist: 0,030 bis 0,080 Gew.-% mindestens eines Elements einer aus Zinn (Sn), Zink (Zn), Eisen (Fe), Silber (Ag) beste- henden Gruppe 0,015 bis 0,040 Gew.-% Phosphor (P) >= 99,90 Gew.-% Kupfer (Cu) Rest unvermeidbare Verunreinigungen.
Use of a low-alloy, phosphorus-deoxidized copper alloy for the production of hollow profile components by hydroforming, the copper alloy having the following composition: 0.030 to 0.080% by weight at least one element one made of tin (Sn), zinc (Zn), iron (Fe), silver (Ag) best- group 0.015 to 0.040% by weight Phosphorus (P) > = 99.90% by weight Copper (Cu) rest unavoidable impurities.
Verwendung nach Anspruch 1, wobei die Kupferlegierung 0,030. bis 0,050 Gew.-% Zinn (Sn) aufweist.Use according to claim 1, wherein the copper alloy is 0.030. up to 0.050% by weight Has tin (Sn). Verwendung nach Anspruch 1, wobei die Kupferlegierung 0,030 bis 0,050 Gew.-% Zink (Zn) aufweist.Use according to claim 1, wherein the copper alloy 0.030 to 0.050 wt .-% Has zinc (Zn). Verwendung nach Anspruch 1, wobei die Kupferlegierung 0,008 bis 0,010 Gew.-% Silber (Ag) aufweist.Use according to claim 1, wherein the copper alloy is 0.008 to 0.010% by weight. Silver (Ag) has. Verwendung nach Anspruch 1, wobei die Kupferlegierung 0,002 bis 0,007 Gew.-% Silber (Ag) und 0,005 bis 0,010 Gew.-% Eisen (Fe) aufweist. Use according to claim 1, wherein the copper alloy 0.002 to 0.007 wt .-% Silver (Ag) and 0.005 to 0.010 wt .-% iron (Fe). Hohlprofilbauteil, hergestellt durch Innenhochdruckumformung aus einer niedriglegierten phosphordesoxidierten Kupferlegierung, wobei die Kupferlegierung folgende Zusammensetzung aufweist: 0,030 bis 0,080 Gew.-% mindestens eines Elements einer aus Zinn (Sn), Zink (Zn), Eisen (Fe), Silber (Ag) beste- henden Gruppe 0,015 bis 0,040 Gew.-% Phosphor(P) >= 99,90 Gew.-% Kupfer (Cu) Rest unvermeidbare Verunreinigungen.
Hollow profile component, produced by internal high pressure forming from a low-alloy, phosphorus-deoxidized copper alloy, the copper alloy having the following composition: 0.030 to 0.080% by weight at least one element one made of tin (Sn), zinc (Zn), iron (Fe), silver (Ag) best- group 0.015 to 0.040% by weight Phosphorus (P) > = 99.90% by weight Copper (Cu) rest unavoidable impurities.
EP03014379A 2002-08-09 2003-06-26 Low-alloy copper alloy and hollow component produced thereby Expired - Lifetime EP1388380B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DK03014379T DK1388380T3 (en) 2002-08-09 2003-06-26 Use of low alloy copper alloy and hollow profile element made thereof

Applications Claiming Priority (2)

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DE10237052A DE10237052A1 (en) 2002-08-09 2002-08-09 Use of a low-alloy copper alloy and hollow profile component made from it
DE10237052 2002-08-09

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EP1388380A1 true EP1388380A1 (en) 2004-02-11
EP1388380B1 EP1388380B1 (en) 2005-05-25

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US (1) US7160401B2 (en)
EP (1) EP1388380B1 (en)
CN (1) CN1475591A (en)
AT (1) ATE296173T1 (en)
DE (2) DE10237052A1 (en)
DK (1) DK1388380T3 (en)
ES (1) ES2239287T3 (en)
HU (1) HU228551B1 (en)
PT (1) PT1388380E (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2716403A1 (en) 2012-09-12 2014-04-09 KME France SAS Copper alloys for heat exchangers

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005014940B4 (en) * 2005-04-01 2008-07-24 Viega Gmbh & Co. Kg Fitting and method of making a fitting
JP4479510B2 (en) * 2005-01-17 2010-06-09 日立電線株式会社 Copper alloy conductor, trolley wire / cable using the same, and method for producing copper alloy conductor
CN100520138C (en) * 2007-06-19 2009-07-29 高新张铜股份有限公司 Technique for processing semihard phosphorus deoxidized copper pipes
DE202017100202U1 (en) * 2017-01-16 2018-04-17 Kme Germany Gmbh & Co. Kg copper product

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JPS5636334A (en) * 1979-08-29 1981-04-09 Matsushita Seiko Co Ltd Manufacture of three way joint for copper pipe
US4284436A (en) * 1975-10-24 1981-08-18 Mihaly Stefan Process for the production of bands or sheets of isotropic mechanical properties from copper or copper alloys
EP0439764A2 (en) * 1990-02-02 1991-08-07 EUROPA METALLI - LMI S.p.A. Process for manufacturing hollow one-piece metal elements
US5407499A (en) * 1985-04-19 1995-04-18 Km Kabelmetal A.G. Making a mold for continuous casting
US20020005235A1 (en) * 2000-07-07 2002-01-17 Km Europa Metal Ag Copper-nickel alloy for use in manufacturing containers for holding molten metals

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US4284436A (en) * 1975-10-24 1981-08-18 Mihaly Stefan Process for the production of bands or sheets of isotropic mechanical properties from copper or copper alloys
JPS5636334A (en) * 1979-08-29 1981-04-09 Matsushita Seiko Co Ltd Manufacture of three way joint for copper pipe
US5407499A (en) * 1985-04-19 1995-04-18 Km Kabelmetal A.G. Making a mold for continuous casting
EP0439764A2 (en) * 1990-02-02 1991-08-07 EUROPA METALLI - LMI S.p.A. Process for manufacturing hollow one-piece metal elements
US20020005235A1 (en) * 2000-07-07 2002-01-17 Km Europa Metal Ag Copper-nickel alloy for use in manufacturing containers for holding molten metals

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2716403A1 (en) 2012-09-12 2014-04-09 KME France SAS Copper alloys for heat exchangers

Also Published As

Publication number Publication date
HU0302517D0 (en) 2003-10-28
US7160401B2 (en) 2007-01-09
DK1388380T3 (en) 2005-09-26
CN1475591A (en) 2004-02-18
HUP0302517A2 (en) 2004-03-01
PT1388380E (en) 2005-08-31
HU228551B1 (en) 2013-03-28
HUP0302517A3 (en) 2004-04-28
US20040120842A1 (en) 2004-06-24
ES2239287T3 (en) 2005-09-16
DE50300570D1 (en) 2005-06-30
EP1388380B1 (en) 2005-05-25
ATE296173T1 (en) 2005-06-15
DE10237052A1 (en) 2004-02-19

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