EP0711843A2 - 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
EP0711843A2
EP0711843A2 EP95116168A EP95116168A EP0711843A2 EP 0711843 A2 EP0711843 A2 EP 0711843A2 EP 95116168 A EP95116168 A EP 95116168A EP 95116168 A EP95116168 A EP 95116168A EP 0711843 A2 EP0711843 A2 EP 0711843A2
Authority
EP
European Patent Office
Prior art keywords
copper
total content
zinc
zinc alloy
content
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.)
Granted
Application number
EP95116168A
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German (de)
English (en)
Other versions
EP0711843B1 (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
Original Assignee
Wieland Werke AG
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Filing date
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
Application granted granted Critical
Publication of EP0711843B1 publication Critical patent/EP0711843B1/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, in particular for the production of fittings, connecting pieces and other objects in short-term or persistent contact with drinking water.
  • Copper-zinc alloys with copper contents between 57 and 63% and zinc contents between 36 and 40% are preferably used for the production of drinking water installations (the% data relate to the weight). Their machining properties are of particular importance for the further processing and finishing of these materials. By alloying the element lead in contents of up to typically 3.5%, excellent machinability is achieved, since lead has practically no miscibility with the matrix elements copper and zinc and acts as chip breaker in the form of homogeneously distributed, globular excretion particles.
  • the materials CuZn36Pb3, CuZn39Pb2 and CuZn39Pb3 represent examples of such alloys, also known as free-cutting brass.
  • EP-OS 0.506.995 describes a machinable copper-zinc alloy with additions of rare earths, in particular lanthanum, cerium, praseodymium, neodymium or mixed metal.
  • rare earths in particular lanthanum, cerium, praseodymium, neodymium or mixed metal.
  • lead is added in a content of up to 3.5%, so that the demand for a significant reduction in the level of non-lead cannot be met.
  • the invention is therefore based on the object for the above.
  • Dispersoids act as chip breakers in a similar way to lead when they are present as discrete particles. They are already introduced into the melt in the form of powders with the appropriate particle size. On the one hand, the dispersoid must be so thermally stable that it does not decompose or melt during the casting process, on the other hand it must be thermodynamically stable against reactions with the matrix elements copper and zinc. In order to achieve the lowest possible segregation in the melt and the solidified casting structure, the dispersoid particles must be readily wettable and their 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 machinability of a copper-zinc alloy can be improved by adding elements which are immiscible with the matrix elements in the solid state, but which form intermetallic phases with the participation of copper and / or zinc. To avoid primary crystallization from the melt, they should not have high melting temperatures.
  • the elements lanthanum, yttrium and scandium form intermetallic compounds with melting points with copper and zinc below 980 ° C.
  • Zircon reacts with copper at 1116 ° C to Cu4Zr and at about 1050 ° C to Cu6Zr.
  • the intermetallic phases are then, like the dispersion particles, as discrete particles at the grain boundaries.
  • the total content of the added elements lanthanum, yttrium, zirconium is preferably 0.2 to 2.5%.
  • intermetallic phases can also be set without the matrix elements being involved.
  • the phase-forming elements are initially dissolved in the melt.
  • the actual phases are formed from the elements added to each other due to their higher enthalpies of formation compared to corresponding phases with copper and / or zinc.
  • these phases have extraordinary thermodynamic stability, which is generally also expressed by their high melting temperatures.
  • the selection criteria for suitable third-element pairings must therefore be the complete miscibility of both components in the copper-zinc melt, a significantly higher enthalpy of formation of the compound to be set than that of compounds made of copper and / or zinc with the added components, and only a slight difference in density between the melt and the intermetallic phase be taken into account.
  • the total content of the elements forming these intermetallic phases is preferably 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 the precipitation-forming elements aluminum, cobalt, magnesium, titanium is preferably 1 to 3% and the silver content 3 to 5%.
  • the total content of all additives is a maximum of 10%.
  • the ratio of the copper content to the zinc content is in particular between 1.4 and 1.7.
  • Elemental copper and nickel were melted together with a CuAl master alloy at 1450 ° C. After the melt had cooled to 1100 ° C., elemental zinc was added.
  • the composition of the melt was CuZn37 (Ni3Al) 2. Of the 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 Ni3Al phase is preferably in finely divided form in the ⁇ mixed crystals.
  • Table 3 shows the mechanical characteristics determined in the cold-worked 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 test (see above conditions).

Landscapes

  • 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)
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 true EP0711843A2 (fr) 1996-05-15
EP0711843A3 EP0711843A3 (fr) 1996-12-11
EP0711843B1 EP0711843B1 (fr) 1999-05-19

Family

ID=6531891

Family Applications (1)

Application Number Title Priority Date Filing Date
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)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005071123A1 (fr) * 2004-01-15 2005-08-04 Ningbo Powerway Group Co., Ltd. Alliages de laition sans plomb a decoupe libre

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
WO2004024964A2 (fr) * 2002-09-13 2004-03-25 Olin Corporation Alliage a base de cuivre durcissant par vieillissement et traitement
DE10301552B3 (de) 2003-01-16 2004-06-24 Rehau Ag + Co. Korrosionsbeständige Messinglegierung für Trinkwasserformteile
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

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1959509A (en) 1930-06-14 1934-05-22 Lucius Pitkin Inc Copper base alloy
JPS54135618A (en) 1978-04-13 1979-10-22 Sumitomo Metal Mining Co Cuttable presssformable brass bismuth alloy
US5137685A (en) 1991-03-01 1992-08-11 Olin Corporation Machinable copper alloys having reduced lead content
EP0506995A1 (fr) 1991-03-30 1992-10-07 Toyo Brass Co. Ltd. Alliage utilisable pour systèmes d'adduction d'eau et présentant des propriétés améliorées pour l'usinabilité et la mise en forme
US5167726A (en) 1990-05-15 1992-12-01 At&T Bell Laboratories Machinable lead-free wrought copper-containing alloys

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT979083B (it) * 1973-02-13 1974-09-30 Tonolli A E C Spa Ottoni bifasici non fragili a caldo contenenti zirconio
JPS5236733B2 (fr) * 1973-06-21 1977-09-17
GB1478162A (en) * 1973-11-21 1977-06-29 New Jersey Zinc Co Powder-metallurgy of cobalt containing brass alloys
JPS5629643A (en) * 1979-08-16 1981-03-25 Furukawa Kinzoku Kogyo Kk Corrosion resistant free cutting brass
JPS6013416B2 (ja) * 1980-09-16 1985-04-06 三菱マテリアル株式会社 展伸加工性および耐候性にすぐれた白色Ｃｕ合金
JPS59133341A (ja) * 1983-01-19 1984-07-31 Mitsubishi Metal Corp 耐食性および熱間加工性にすぐれた高強度Ｃｕ合金
JPS6082634A (ja) * 1983-10-12 1985-05-10 Nippon Mining Co Ltd 耐食性に優れた銅合金
JPS6082632A (ja) * 1983-10-12 1985-05-10 Nippon Mining Co Ltd 耐食性に優れた銅合金
JPS63100144A (ja) * 1986-05-23 1988-05-02 Nippon Mining Co Ltd 耐食性に優れた銅合金
JPS6473035A (en) * 1987-09-14 1989-03-17 Yoshida Kogyo Kk Cu shape memory alloy
JPH02145736A (ja) * 1988-11-25 1990-06-05 Kobe Steel Ltd 耐脱亜鉛腐食性が優れた銅合金
JPH03170647A (ja) * 1989-11-28 1991-07-24 Nippon Mining Co Ltd 特殊黄銅の製造方法
JPH03291342A (ja) * 1990-04-06 1991-12-20 Chuetsu Gokin Chuko Kk 耐摩耗性銅合金
JPH042416A (ja) * 1990-04-17 1992-01-07 Sumitomo Electric Ind Ltd ワイヤ放電加工用電極線
US5256214A (en) * 1990-10-31 1993-10-26 Olin Corporation Copper alloys and method of manufacture thereof
US5258108A (en) * 1991-12-27 1993-11-02 Blue Star Technologies, Ltd. Fluid-treatment and conditioning apparatus and method
KR100191702B1 (ko) * 1992-06-02 1999-06-15 에카르트 마이너즈, 클라우스 랠러 황동 합금
US5330712A (en) * 1993-04-22 1994-07-19 Federalloy, Inc. Copper-bismuth alloys
US5360591A (en) * 1993-05-17 1994-11-01 Kohler Co. Reduced lead bismuth yellow brass

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1959509A (en) 1930-06-14 1934-05-22 Lucius Pitkin Inc Copper base alloy
JPS54135618A (en) 1978-04-13 1979-10-22 Sumitomo Metal Mining Co Cuttable presssformable brass bismuth alloy
US5167726A (en) 1990-05-15 1992-12-01 At&T Bell Laboratories Machinable lead-free wrought copper-containing alloys
US5137685A (en) 1991-03-01 1992-08-11 Olin Corporation Machinable copper alloys having reduced lead content
US5137685B1 (en) 1991-03-01 1995-09-26 Olin Corp Machinable copper alloys having reduced lead content
EP0506995A1 (fr) 1991-03-30 1992-10-07 Toyo Brass Co. Ltd. Alliage utilisable pour systèmes d'adduction d'eau et présentant des propriétés améliorées pour l'usinabilité et la mise en forme

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PAIGE, COVINO, CORROSION, vol. 48, no. 12, pages 1040 - 1046

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005071123A1 (fr) * 2004-01-15 2005-08-04 Ningbo Powerway Group Co., Ltd. Alliages de laition sans plomb a decoupe libre
US7628872B2 (en) 2004-01-15 2009-12-08 Ningbo Powerway Alloy Material Co., Ltd. Lead-free free-cutting copper-antimony alloys

Also Published As

Publication number Publication date
DE4438485A1 (de) 1996-05-02
FI955074A (fi) 1996-04-29
FI955074A0 (fi) 1995-10-25
FI111856B (fi) 2003-09-30
DE4438485C2 (de) 1998-05-20
US5766377A (en) 1998-06-16
DE59505964D1 (de) 1999-06-24
EP0711843B1 (fr) 1999-05-19
EP0711843A3 (fr) 1996-12-11

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