EP0711843B1 - Utilisation d'un alliage de cuivre-zinc pour installations d'eau potable - Google Patents

Utilisation d'un alliage de cuivre-zinc pour installations d'eau potable Download PDF

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Publication number
EP0711843B1
EP0711843B1 EP95116168A EP95116168A EP0711843B1 EP 0711843 B1 EP0711843 B1 EP 0711843B1 EP 95116168 A EP95116168 A EP 95116168A EP 95116168 A EP95116168 A EP 95116168A EP 0711843 B1 EP0711843 B1 EP 0711843B1
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EP
European Patent Office
Prior art keywords
copper
total content
zinc alloy
elements
zinc
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP95116168A
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German (de)
English (en)
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EP0711843A2 (fr
EP0711843A3 (fr
Inventor
Gert Dipl.-Ing. Dr. rer. nat. Müller
Harald Dipl.-Chem. Siegele
Michael Dipl.-Ing. Dr. Rer. Nat. Bohsmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wieland Werke AG
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Wieland Werke AG
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Publication date
Application filed by Wieland Werke AG filed Critical Wieland Werke AG
Publication of EP0711843A2 publication Critical patent/EP0711843A2/fr
Publication of EP0711843A3 publication Critical patent/EP0711843A3/fr
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
    • 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 the use of a copper-zinc alloy for drinking water installations, especially for manufacturing of fittings, connectors and other Objects in short or persistent contact with Drinking water.
  • EP-OS 0.506.995 describes a machinable copper-zinc alloy with rare earth additives, especially lanthanum, Cerium, praseodymium, neodymium or mixed metal.
  • rare earth additives especially lanthanum, Cerium, praseodymium, neodymium or mixed metal.
  • As an essential Lead is included in the material up to alloyed to 3.5%, so that the demand for a clear Reduction of the nonchalance can not be met can.
  • the invention is therefore based on the object for the above. Propose a copper alloy to use the one Favorable machining behavior for further processing and contains neither lead nor bismuth as components.
  • the object is achieved by the use of a Copper-zinc alloy with the composition specified in claim 1 dissolved.
  • Dispersoids act in a similar way to lead as a chip breaker, if they exist as discrete particles. you will be already in the form of powders with the appropriate particle size introduced into the melt.
  • the dispersoid must a thermally so stable that it is in the casting process does not decompose or melt, on the other hand thermodynamically stable against reactions with the matrix elements copper and be zinc.
  • the dispersoid particles In order to achieve a segregation that is as low as possible to achieve in the melt and the solidified casting structure, the dispersoid particles must be well wettable and you specific weight should correspond approximately to that of the melt.
  • the compounds listed in Table 1 meet these criteria.
  • the melting point of the dispersoid serves as a measure for assessing its thermal stability.
  • the total content of the dispersoids is preferably 0.5 to 3 %.
  • the elements yttrium and zirconium form copper and zinc intermetallic compounds with melting points below 980 ° C.
  • Zirconium reacts with copper at 1116 ° C to Cu 4 Zr and at about 1050 ° C to Cu 6 Zr.
  • the intermetallic phases are then, like the dispersion particles, as discrete particles at the grain boundaries.
  • the total content of the elements added is preferably Yttrium and zirconium 0.2 to 2.5%.
  • Copper and / or zinc can also have intermetallic phases can be set without involving the matrix elements.
  • the phase-forming elements are initially in the melt solved.
  • the actual phases are formed from the added ones Elements among themselves, due to their higher educational enthalpies compared to corresponding phases with Copper and / or zinc.
  • these phases have an extraordinary thermodynamic Stability, which is also generally characterized by its high Expresses melting temperatures.
  • the total content of these is preferably intermetallic Phase-forming elements 0.5 to 3%.
  • the intermetallic phases listed in Table 2 essentially meet the criteria mentioned.
  • the enthalpies of formation are not known for some compounds, but their suitability can be estimated from their melting temperatures.
  • the standard enthalpy of formation of ⁇ -CuZn is about -18 kJ / mol for comparison.
  • the total content of all additives is a maximum of 10%.
  • Elemental copper and nickel were melted together with a Cu-Al master alloy at 1450 ° C. After the melt had cooled to 1100 ° C., elemental zinc was added. The composition of the melt was CuZn37 (Ni 3 Al) 2. The melt was poured off in a stand mold. The cast structure was then thermoformed with a degree of deformation of 55%, followed by 15% cold forming.
  • Fig. 1 shows the casting structure of the material at 500 times magnification.
  • the intermetallic Ni 3 Al phase is preferably in finely divided form in the ⁇ mixed crystals.
  • Table 3 shows the mechanical characteristics determined in the cold-deformed state (Brinell hardness HB, tensile strength Rm, yield strength Rp 0.2, elongation A10, machining index Zi).
  • the material has a machining index of approx. 80 to 90.
  • Elemental copper was smelted together with a Cu-Co master alloy. After the addition of elemental zinc, the alloy with the composition CuZn39Co3 according to embodiment 1 was cast and processed.
  • the mechanical characteristics of the cold-formed material are also summarized in Table 3 .
  • the machining index is approximately 70 to 80.
  • Fig. 6 shows a corresponding chip sample (see above conditions). Mechanical characteristics of the materials mentioned in the exemplary embodiments in comparison to commercial materials. Condition: 15% cold formed.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Domestic Plumbing Installations (AREA)
  • Contacts (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)

Claims (7)

  1. Utilisation d'un alliage cuivre-zinc exempt de plomb et de bismuth qui est constitué par au moins une addition d'au moins un des groupes suivants a) à d), le reste par du cuivre et du zinc dans un rapport de 1,3 à 2,0 :
    a) le groupe constitué par des matières dispersées stables à la chaleur Cr2Ta, Dy2O3, Er2O3, MoB, Mo2C, NbC, Nd2O3, Sm2O3, WS2, WSi2, Yb2O3, ZrC, selon une teneur totale de 0,1 à 5,0 % en poids,
    b) le groupe constitué par les éléments yttrium et zirconium, selon une teneur totale de 0,1 à 5,0 % en poids,
    c) le groupe constitué par les éléments lanthane et nickel formant des phases intermétalliques selon une teneur totale de 0,1 à 5,0 % en poids, auxquels à chaque fois est adjoint au moins un autre parmi les éléments aluminium, niobium, antimoine, zinc, selon une teneur totale de 0,1 à 5,0 % en poids,
    d) le groupe constitué par les éléments argent, cobalt, magnésium, titane, formant une précipitation dans une teneur totale de 1,0 à 5,0 % en poids,
    pour des installations d'eau potable, en particulier pour la fabrication de robinetteries et de pièces de liaison qui sont en contact aussi bien temporaire que prolongé avec des eaux potables.
  2. Utilisation d'un alliage cuivre-zinc selon la revendication 1, pour lequel la teneur totale des matières dispersées est de 0,5 à 3 %, pour le but selon la revendication 1.
  3. Utilisation d'un alliage cuivre-zinc selon la revendication 1 ou 2, pour lequel la teneur totale des éléments ajoutés yttrium et zirconium est de 0,2 à 2,5 %, pour le but selon la revendication 1.
  4. Utilisation d'un alliage cuivre-zinc selon une ou plusieurs des revendications 1 à 3, pour lequel la teneur totale des éléments formant des phases intermétalliques est de 0,5 à 3 %, pour le but selon la revendication 1.
  5. Utilisation d'un alliage cuivre-zinc selon une ou plusieurs des revendications 1 à 4, pour lequel la teneur des éléments formant une précipitation cobalt, magnésium, titane est choisie dans la gamme de 1 à 3 % et la teneur en argent dans la gamme de 3 à 5 % de manière que la teneur totale des éléments ne dépasse pas 5 %, pour le but selon la revendication 1.
  6. Utilisation d'un alliage cuivre-zinc selon une ou plusieurs des revendications 1 à 5, pour lequel la teneur totale de tous les additifs est au maximum de 10 %, pour le but selon la revendication 1.
  7. Utilisation d'un alliage cuivre-zinc selon une ou plusieurs des revendications 1 à 6, pour lequel le rapport de la teneur en cuivre à la teneur en zinc est entre 1,4 et 1,7, pour le but selon la revendication 1.
EP95116168A 1994-10-28 1995-10-13 Utilisation d'un alliage de cuivre-zinc pour installations d'eau potable Expired - Lifetime EP0711843B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4438485 1994-10-28
DE4438485A DE4438485C2 (de) 1994-10-28 1994-10-28 Verwendung einer Kupfer-Zink-Legierung für Trinkwasserinstallationen

Publications (3)

Publication Number Publication Date
EP0711843A2 EP0711843A2 (fr) 1996-05-15
EP0711843A3 EP0711843A3 (fr) 1996-12-11
EP0711843B1 true EP0711843B1 (fr) 1999-05-19

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ID=6531891

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EP95116168A Expired - Lifetime EP0711843B1 (fr) 1994-10-28 1995-10-13 Utilisation d'un alliage de cuivre-zinc pour installations d'eau potable

Country Status (4)

Country Link
US (1) US5766377A (fr)
EP (1) EP0711843B1 (fr)
DE (2) DE4438485C2 (fr)
FI (1) FI111856B (fr)

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* Cited by examiner, † Cited by third party
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JPH11189856A (ja) * 1997-10-24 1999-07-13 Toto Ltd 黄銅材、黄銅管材及びそれらの製造方法
DE10158130C1 (de) * 2001-11-27 2003-04-24 Rehau Ag & Co Verwendung einer korrosionsbeständigen Kupfer-Zink-Legierung für Trinkwasserformteile
US20030145681A1 (en) * 2002-02-05 2003-08-07 El-Shall M. Samy Copper and/or zinc alloy nanopowders made by laser vaporization and condensation
KR20050050654A (ko) * 2002-09-13 2005-05-31 올린 코포레이션 시효 경화 구리계 합금 및 이의 가공방법
DE10301552B3 (de) * 2003-01-16 2004-06-24 Rehau Ag + Co. Korrosionsbeständige Messinglegierung für Trinkwasserformteile
CN1291051C (zh) * 2004-01-15 2006-12-20 宁波博威集团有限公司 无铅易切削锑黄铜合金
US20060048553A1 (en) * 2004-09-03 2006-03-09 Keyworks, Inc. Lead-free keys and alloys thereof
CN1730692B (zh) * 2005-08-09 2010-04-28 河北工业大学 一种功能合金材料及其制备方法和用途
DE102007015442B4 (de) * 2007-03-30 2012-05-10 Wieland-Werke Ag Verwendung einer korrosionsbeständigen Kupferlegierung
TWI485271B (zh) * 2013-01-09 2015-05-21 Globe Union Ind Corp Low shrinkage corrosion resistant brass alloy
CN104451247B (zh) * 2014-11-20 2017-04-19 大连海事大学 具有防垢功能的纳米颗粒增强合金材料，其制备方法及应用
CN106086514B (zh) * 2016-08-27 2017-12-05 泰州永盛包装股份有限公司 一种氧化钕弥散强化铜基合金及其制备方法

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Also Published As

Publication number Publication date
DE4438485A1 (de) 1996-05-02
EP0711843A2 (fr) 1996-05-15
FI955074A0 (fi) 1995-10-25
DE4438485C2 (de) 1998-05-20
FI955074A (fi) 1996-04-29
DE59505964D1 (de) 1999-06-24
EP0711843A3 (fr) 1996-12-11
US5766377A (en) 1998-06-16
FI111856B (fi) 2003-09-30

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